Wednesday, May 4, 2016

[Ichthyology • 2016] Potamotrygon wallacei • A New Species of Neotropical Freshwater Stingray (Chondrichthyes: Potamotrygonidae) from the Rio Negro, Amazonas, Brazil: the Smallest Species of Potamotrygon


Potamotrygon wallacei 
Carvalho, Rosa & Araújo, 2016 DOI:  10.11646/zootaxa.4107.4.5


Abstract

A new species of Potamotrygon is described from the Rio Negro drainage, Amazonas, Brazil. In spite of being cited or pictured several times in the scientific and aquarium fish literature since the 19th Century, it had been misidentified and still lacked a scientific name. Potamotrygon wallacei, n. sp., is diagnosed by the following characters: dorsal surface of disc light brown, with black irregularly-shaped vermiculate markings forming an amphora- or Ω-shaped figure on mid-disc, delimiting light brown reniform areas at disc center, and with subcircular light brown ocellate markings on disc margins; small body size (smallest known Potamotrygon species; largest examined specimen measured 310 mm DW); dorsal spines on tail usually rather low, without broad bases, in one to rarely three irregular rows, but extending posteriorly only to tail mid-length and not to caudal stings, with altogether relatively few spines; denticles on posterior mid-disc and tail base Y-shaped, with a central, anterior, bulbous cusp and usually two posterior pairs of smaller, rounded cusps; and single (anterior) angular cartilage. The new species is similar to P. orbignyi and other "reticulated" species in having a single (anterior) angular cartilage and in the color pattern of the tail, but is easily distinguished based on its size, dorsal tail spine arrangement, and specific details of color pattern.

Keywords: Potamotrygon wallacei n. sp., Myliobatiformes, morphology, systematics, taxonomy, Pisces




Marcelo R. de Carvalho, Ricardo S. Rosa and Maria Lúcia G. de Araújo. 2016. A New Species of Neotropical Freshwater Stingray (Chondrichthyes: Potamotrygonidae) from the Rio Negro, Amazonas, Brazil: the Smallest Species of PotamotrygonZootaxa. 4107(4);  DOI:  10.11646/zootaxa.4107.4.5

[Ichthyology • 2015] Systematics and Morphology of Potamotrygon orbignyi (Castelnau, 1855) and allied forms (Myliobatiformes: Potamotrygonidae)


FIGURE 34. Original illustrations of Potamotrygon orbignyi (left side) and Potamotrygon dumerilii (right side, indicated by an arrow), modified from Castelnau (1855, plates 48 and 49).

Abstract

The Neotropical freshwater stingray Potamotrygon orbignyi (Castelnau, 1855), and other similar "reticulated" species occurring in northern South American basins, were submitted to a thorough taxonomic analysis based on an extensive external and internal morphological study. The identity of Porbignyi and the taxonomic status of the related nominal species Potamotrygon dumerilii (Castelnau, 1855), Potamotrygon reticulata (Günther, 1880), and Potamotrygon humerosa Garman, 1913, are defined. Taxonomic and morphological analyses revealed that P. reticulata and P. dumerilii fall within the range of variation found in Porbignyi and were consequently treated as junior synonyms, corroborating previous works. The extensive variation in coloration observed in P. orbignyi could not be divided into consistent morphotypes; P. orbignyi is therefore a widespread species in the upper, mid and lower Amazonas basin, the Orinoco drainage, and in rivers of Suriname and the Guianas. Additionally, P. humerosa and Potamotrygon marinae Deynat, 2007 were found to present characters that support their validity, and are redescribed based on newly collected material. Potamotrygon humerosa occurs predominantly in the mid and lower Amazonas River and in lower reaches of many of its affluents, whereas P. marinae is known only from French Guiana and Suriname. Characters that proved valuable as diagnostic indicators, either in combination or as derived features, are primarily from coloration, dermal denticles and spines (morphology, development and distribution), meristic features (e.g. numbers of tooth rows, vertebrae and mesopterygial radials), morphometric proportions (e.g. snout length, tail width at base and length), and size at sexual maturity.

Keywords: Pisces, Taxonomy, Neotropical freshwater stingrays, anatomy, Potamotrygon humerosaPotamotrygon marinae


Silva, João P. C. B. D. and Marcelo R. de Carvalho. 2015. Systematics and Morphology of Potamotrygon orbignyi (Castelnau, 1855) and allied forms (Chondrichthyes: Myliobatiformes: Potamotrygonidae). Zootaxa. 3982(1): 1–82. DOI: 10.11646/zootaxa.3982.1.1

Tuesday, May 3, 2016

[Herpetology • 2016] Hemiphyllodactylus cicak • Phylogenetic Relationships of Geckos of the Hemiphyllodactylus harterti Group, A New Species from Penang Island, Peninsular Malaysia, and A Likely Case of True Cryptic Speciation


Hemiphyllodactylus cicak 
Cobos, Grismer, Wood, Quah, Anuar & Muin, 2016

Abstract

An integrative taxonomic analysis based on the mitochondrial gene ND2 and its flanking tRNAs, morphology, and color pattern indicates that a newly discovered gecko described herein as Hemiphyllodactylus cicak sp. nov. from Penang Hill on the Island of Penang, Peninsular Malaysia is a member of the H. harterti group. Hemiphyllodactylus cicak sp. nov. is most closely related to the clade composed of the sister species H. harterti from Bukit Larut, Perak in the Bintang Mountain Range and H. bintik from Gunung Tebu, Terengganu from the Timur Mountain Range. These three allopatric species form a monophyletic group that extends approximately 270 km across three isolated mountain ranges in northern Peninsular Malaysia. The molecular analysis also indicates that H. titiwangsaensis from the Titiwangsa Mountain Range is composed of three genetically distinct allopatric populations. The southern two populations from Fraser’s Hill and Genting Highlands, Pahang have an uncorrected pairwise sequence divergence of 3.5% whereas these two populations have 12.4 and 12.8 % sequence divergences, respectively, from the northern population at Cameron Highlands, Pahang. Although the high sequence divergence clearly distinguishes the southern two populations from the former as a different species, all three populations are morphologically indistinguishable, leading to the hypothesis of a true, cryptic speciation event.

Keywords: Hemiphyllodactylus, Malaysia, Penang, phylogeny, new species, cryptic speciation, Reptilia



Anthony Cobos, L Lee Grismer, Perry L Wood, Jr., Evan S H Quah, Shahrul Anuar and Mohd. Abdul Muin. 2016. Phylogenetic Relationships of Geckos of the Hemiphyllodactylus harterti Group, A New Species from Penang Island, Peninsular Malaysia, and A Likely Case of True Cryptic Speciation. Zootaxa.  4107(3); DOI:  10.11646/zootaxa.4107.3.5

[Herpetology • 2016] Dendropsophus mapinguari • A New Species of Clown Tree Frog, Dendropsophus leucophyllatus Species Group (Anura, Hylidae), from Amazonia


Dendropsophus mapinguari
Peloso, Orrico, Haddad, Lima-Filho & Sturaro, 2016

Abstract
We describe a new species of Dendropsophus (Anura: Hylidae: Hylinae: Dendropsophini) from the Amazon river (= Rio Amazonas) basin, state of Amazonas, northern Brazil. The new taxon is included in the D. leucophyllatus group based on its phylogenetic position and on the presence of a pair of pectoral glands (a likely synapomorphy of the group). The species is distinguished from other species in the group by its color pattern and the morphology of hand and feet tubercles. In order to assess the phylogenetic relationships of the new taxon, we compiled a dataset including mitochondrial and nuclear DNA sequence data for all but one species in the D. leucophyllatus group, plus a series of hylid outgroups. A tree-alignment (direct optimization) parsimony analysis firmly support the new species as the sister taxon of D. sarayacuensis. The monophyly of the D. leucophyllatus species group is not recovered in our analysis and the issue is discussed further.

Keywords: Amazon, Amphibia, Biodiversity, Hylinae, Phylogeny, Systematics, Taxonomy 


The newfound frog gets its name from a legendary rain forest beast called the mapinguari.
PHOTOGRAPH BY P. PELOSO  on.natgeo.com/1VHiRPc


Pedro L.V. Peloso, Victor G.D. Orrico, Célio F.B. Haddad, Geraldo R. Lima-Filho and Marcelo J. Sturaro. 2016. A New Species of Clown Tree Frog, Dendropsophus leucophyllatus Species Group, from Amazonia (Anura, Hylidae). South American Journal of Herpetology. 11(1); 66-80.  DOI: 10.2994/SAJH-D-16-00003.1

New Amazon Frog Named After Mythical Monster
http://on.natgeo.com/1VHiRPc via @NatGeo

Monday, May 2, 2016

[Invertebrate • 2016] Orientothele alyratus • A New Genus and New Species of Diplurid Spider (Araneae: Mygalomorphae: Dipluridae) from northeast India


Orientothele alyratus  
Mirza, Sanap & Kunte, 2016

Abstract
A new diplurid genus and species is described from northeast India based on a single female specimen from Jampui hills. Orientothele gen. nov. is placed in the subfamily Diplurinae based on the presence of one row of teeth on the chelicerae. The new genus and species can be diagnosed from most diplurid genera in lacking lyra on the prolateral face of maxilla, paired claw with one row of teeth, maxilla with numerous cuspules, scopulae absent on all legs, and spermathecae consisting of two elongate stalks with bulbous receptacles at their tips which are bent inwards. Ischnothele indicola Tikader, 1969 is here treated as incertae sedis with regards to its generic placement in light of the discovery of Orientothele gen. nov.

Keywords: mygalomorphae; new genus; northeast India; Orientothele gen. nov.; Orientothele alyratus sp. nov.


Taxonomic accounts

Family Dipluridae Simon, 1889
Subfamily Diplurinae Simon, 1889
Orientothele gen. nov.
urn:lsid:zoobank.org:act:1C88D2EE-9B55-4E67-8201-3232D7604038

Type species: Orientothele alyratus gen. et. sp. nov.

Diagnosis. Orientothele gen. nov. is here placed in the subfamily Diplurinae based on the presence of one row of teeth on the chelicerae. The new genus and species can be diagnosed from most diplurid genera in lacking lyra on the prolateral face of the maxilla, paired claw with one row of teeth, maxilla with numerous cuspules, scopulae absent on all legs, and spermathecae consists of two elongate stalks with bulbous receptacles at their tips which are bent inwards. Male unknown.

Description. A medium sized spider in relation to members of this family reaching a total length of 17.2 mm excluding chelicerae length. All legs bearing three claws, superior tarsal claws with a single row of sigmoid dentition and inferior tarsal claw with three dentitions. Scopulae absent. Two pairs of spinnerets and the posterior lateral spinneret long and widely spaced. Apical segment of posterior lateral spinnerets entire, no pseudosegmentation seen. Metatarsi of all legs with distal preening combs. Chelicerae with 13 promarginal teeth in a row of teeth and with 28 basosomal teeth. Maxillary and labial cuspules present. Labio-sternal collar well developed. Sternum cordate and the posterior edge nearly separating coxa IV. Carapace smooth, glabrous, with soft golden setae. Caput low. Fovea transverse, short. Spermathecae consists of two elongate stalks with bulbous receptacles at their tips which are bent inwards. Spigots on posterior lateral spinnerets fused and flagelliform. Base of spigot smooth with undulating grooved surface. Filiform trichobothria 13–20 present in a row on tarsi of all legs and palp. Spines present on all legs including tarsi of all legs.

Distribution. Presently known from borders of Tripura and Mizoram in northeast India

Comparisons. The new genus cannot be placed in the known subfamilies following diagnosis provided by Raven (1985). However, with an amended diagnosis by Drolshagen and Bäckstam (2009) the new genus may be placed in the subfamily Diplurinae in bearing the synapomorphy of a single row of teeth on chelicerae. Within Diplurinae the Orientothele gen. nov. differs from Metriura in bearing a single row of teeth on superior tarsal claws (vs. 2 in Metriura), from Diplura, Trechona, and Harmonicon in lacking prolateral maxillary lyra (vs. absent in Diplura, Trechona, and Harmonicon).

Etymology. The proposed generic name is a compound work formed by the word ‘Oriento’ = Oriental referring to the location of the type locality and the later word is a term assigned to members of the family Dipluridae. The sex of the proposed name is masculine.


Orientothele alyratus sp. nov.
urn:lsid:zoobank.org:act:9C25943D-F606-4399-9165-2E059DDE5CC4

Type. Holotype:♀, NCBS AR142 collected from Belianchip, Jampui Hills in North Tripura district, Tripura, India (23.968854°, 92.277980°; elevation 644 m). Collected by Rajesh Sanap and Zeeshan Mirza on November 30, 2014.

Diagnosis. As for the genus

Description of holotype female NCBS AR142 ( Figure 1). Holotype in general good condition with an exposed ventral cavity from a dissection to retrieve spermathecae. The abdomen is laterally compressed likely an artifact of preservation. The posterior lateral spinnerets lack the apical segment which has been removed for scanning electron imaging.

Etymology. The specific epithet is a Latinized compound word for “alyrate” with a Latin suffix ‘us’ referring to the absence of lyra on the prolateral face of maxilla.


Zeeshan A. Mirza, Rajesh V. Sanap and Krushnamegh Kunte. 2016. A New Genus and New Species of Diplurid Spider (Araneae: Mygalomorphae: Dipluridae) from northeast India. Journal of Asia-Pacific Biodiversity.  DOI:  10.1016/j.japb.2016.03.013

Saturday, April 30, 2016

[Ornithology • 2016] Reproductive Biology of the Sapayoa Sapayoa aenigma, the “Old World suboscine” of the New World


A Sapayoa Sapayoa aenigma emerges from its nest in the Panamanian rainforest.  

photos: J.M. Hite
  DOI: 10.1642/AUK-16-5.1 

ABSTRACT
The Sapayoa (Sapayoa aenigma), a low-density resident of Chocó rainforests from Panama to Ecuador, has long perplexed ornithologists. It was originally described as a manakin (Pipridae), but molecular work has revealed its closest living relatives to be Old World suboscines (Eurylaimides) and supported its placement in the monotypic family of Sapayoidae. Despite such phylogenetic intrigue, little is known about the Sapayoa's general life history or reproductive biology; only one nest has been described. We present information on 2 actively attended and 13 inactive Sapayoa nests in Darién National Park, Panama. We provide the first detailed description of individual effort at an active nest, family group dynamics during the nesting period, the plumage of immature birds, and the range of vocalizations produced. We also present the first documentation of cooperative breeding and compile several recent nesting observations, extending the published Sapayoa breeding period by several months. Furthermore, we describe unusual behaviors among provisioning birds, including mounting between individuals of the same sex and mounting of a female by immature male helpers during chick provisioning. The receiving individual gave a conspicuous solicitation display before each mounting. Finally, we highlight elements of the Sapayoa's natural history that echo its Old World relatives and contrast with members of the New World Tyranni. For example, the Sapayoa resembles the eurylaimid broadbills—and differs starkly from the manakins—in diet, nest structure, breeding system, and mode of parental care.

Keywords: cooperative breeding, helpers, mounting, Old World suboscines, Sapayoa aenigma, Sapayoidae

Sapayoa aenigma, Nusagandi, Panama 
photo: Jan Axel 



Sarah A. Dzielski, Benjamin M. Van Doren, Jack P. Hruska, and Justin M. Hite. 2016. Reproductive Biology of the Sapayoa (Sapayoa aenigma), the “Old World suboscine” of the New World [Biología reproductiva de Sapayoa aenigma, el “suboscín del Viejo Mundo” que habita el Nuevo Mundo]. The Auk. 133(3); 347-363. DOI: 10.1642/AUK-16-5.1


Field Study Helps Confirm The Sapayoa Is Like No Other Bird In The New World
An Old World bird in a New World rainforest http://phy.so/380909066 via @physorg_com


The Sapayoa, a rainforest bird from Central and South America, is an evolutionary enigma—genetic analysis shows that its closest relatives are bird species living across the ocean in Asia and Africa. Now, new research in The Auk: Ornithological Advances demonstrates for the first time that its natural history links it to its evolutionary relatives thousands of miles away.

How the Sapayoa ended up so far from other members of its lineage remains a mystery, and little is known about its reproductive biology or social behavior. However, new field work in Panama by Sarah Dzielski and Benjamin Van Doren of Cornell University and their colleagues reveals that Sapayoas consistently build nests that hang over the water along ravine-bottom streams. One of the active nests they observed was attended by a family group comprised of an adult male and female and two immature males, all four of which brought food to the two chicks. The researchers were surprised by the social behavior they observed, which included mounting between individuals of the same sex, possibly to establish dominance and maintain social cohesion.
These are the first extended observations of Sapayoa breeding behavior, and they provide hints at how this unusual bird is connected with its roots. Many of the Sapayoa's Old World relatives are cooperative breeders, getting help from family groups, and the pear-shaped hanging nest also is consistent with Old World "suboscines," the group of birds to which Sapayoas belong.
Dzielski, Van Doren, and their colleagues Jack Hruska and Justin Hite searched for Sapayoa nests as part of an expedition to Panama's Darién National Park in summer 2014, observing the family group at their focal nest for more than 70 hours over ten days. "Nest searching was always an adventure," says Dzielski. "We found countless abandoned nests, and while checking inside for eggs or evidence that the nest was active, we found all sorts of surprises. In a few instances, a large grasshopper the size of a mouse hopped out from under the flap and scared the daylights out of us!"
"The Sapayoa is so different from other passerine birds that it is currently placed in its own family, Sapayoidae, but relatively little is known about its natural history," adds Van Doren. "This gap in scientific knowledge was the reason we traveled to eastern Panama to learn about this enigmatic species. We hoped that more information about the Sapayoa's natural history would cast its surprising evolutionary relationships in a new and clearer light."
"The Sapayoa has long been a mystery bird. When my colleagues and I identified it as the only Old World suboscine in the New World in 2003, it only became more mysterious," says Jon Fjeldså of the University of Copenhagen, who led the research team that first identified the Sapayoa's unusual origins. "How did it arrive in South America? Why does it resemble a manakin? And does it still behave like an Old World suboscine? I am excited to learn that it indeed does!"



RESUMEN
Sapayoa aenigma, un ave residente en bajas densidades en los bosques húmedos del Chocó desde Panamá hasta Ecuador, ha confundido a los ornitólogos por bastante tiempo. Aunque la especie originalmente fue descrita como un saltarín (Pipridae), estudios moleculares recientes revelaron que sus parientes más cercanos son los suboscinos del viejo mundo (Eurylaimides) y sustentan su ubicación en la familia monotípica Sapayoidae. A pesar de esta intriga filogenética se sabe muy poco sobre la historia de vida o la biología reproductiva de Sapayoa; sólo se ha descrito un nido. En este trabajo presentamos información de 2 nidos activos y 13 nidos inactivos de Sapayoa encontrados en el Parque Nacional Darién, Panamá. Presentamos la primera descripción detallada del esfuerzo individual en un nido activo, la dinámica del grupo familiar durante el periodo de anidación, el plumaje de las aves inmaduras y el repertorio de vocalizaciones. También presentamos la primera evidencia de cría cooperativa y recopilamos varias observaciones recientes de anidación que extienden el periodo reproductivo conocido de Sapayoa en varios meses. Además describimos comportamientos inusuales entre las aves que proveen alimento a sus crías, incluyendo la monta entre individuos del mismo sexo y entre un individuo joven y una hembra adulta durante la alimentación de los polluelos. El individuo que recibía la monta ejecutaba antes un despliegue para solicitarla. Finalmente, resaltamos elementos de la historia natural de Sapayoa que se asemejan a las de sus parientes del Viejo Mundo y contrastan con las de miembros de Tyranni en el Nuevo Mundo. Por ejemplo, Sapayoa se asemeja a los Eurylaimidae (y difiere drásticamente de los Pipridae) en dieta, estructura de los nidos, sistema reproductivo y modo de cuidado parental.

Palabras clave: ayudantes del nido, cría cooperativa, monta, Sapayoa aenigma, Sapayoidae, suboscines del viejo mundo

[Paleontology • 2016] Sarmientosaurus musacchioi • A Basal Lithostrotian Titanosaur (Dinosauria: Sauropoda) with a Complete Skull: Implications for the Evolution and Paleobiology of Titanosauria


Sarmientosaurus musacchioi
Martínez, Lamanna, Novas, Ridgely, Casal, Martínez, Vita & Witmer, 2016
 Life reconstruction of two individuals of the new titanosaurian dinosaur species Sarmientosaurus musacchioi in their ~95 million-year-old habitat in southern Chubut Province, central Patagonia, Argentina, with a digital rendering of the skull in the same position as the head of the foreground individual.

life reconstruction & skull by Mark A. Klingler, Carnegie Museum of Natural History and WitmerLab, Ohio University   DOI: 10.1371/journal.pone.0151661

Abstract

We describe Sarmientosaurus musacchioi gen. et sp. nov., a titanosaurian sauropod dinosaur from the Upper Cretaceous (Cenomanian—Turonian) Lower Member of the Bajo Barreal Formation of southern Chubut Province in central Patagonia, Argentina. The holotypic and only known specimen consists of an articulated, virtually complete skull and part of the cranial and middle cervical series. Sarmientosaurus exhibits the following distinctive features that we interpret as autapomorphies: (1) maximum diameter of orbit nearly 40% rostrocaudal length of cranium; (2) complex maxilla—lacrimal articulation, in which the lacrimal clasps the ascending ramus of the maxilla; (3) medial edge of caudal sector of maxillary ascending ramus bordering bony nasal aperture with low but distinct ridge; (4) ‘tongue-like’ ventral process of quadratojugal that overlaps quadrate caudally; (5) separate foramina for all three branches of the trigeminal nerve; (6) absence of median venous canal connecting infundibular region to ventral part of brainstem; (7) subvertical premaxillary, procumbent maxillary, and recumbent dentary teeth; (8) cervical vertebrae with ‘strut-like’ centroprezygapophyseal laminae; (9) extremely elongate and slender ossified tendon positioned ventrolateral to cervical vertebrae and ribs. The cranial endocast of Sarmientosaurus preserves some of the most complete information obtained to date regarding the brain and sensory systems of sauropods. Phylogenetic analysis recovers the new taxon as a basal member of Lithostrotia, as the most plesiomorphic titanosaurian to be preserved with a complete skull. Sarmientosaurus provides a wealth of new cranial evidence that reaffirms the close relationship of titanosaurs to Brachiosauridae. Moreover, the presence of the relatively derived lithostrotian Tapuiasaurus in Aptian deposits indicates that the new Patagonian genus represents a ‘ghost lineage’ with a comparatively plesiomorphic craniodental form, the evolutionary history of which is missing for at least 13 million years of the Cretaceous. The skull anatomy of Sarmientosaurus suggests that multiple titanosaurian species with dissimilar cranial structures coexisted in the early Late Cretaceous of southern South America. Furthermore, the new taxon possesses a number of distinctive morphologies—such as the ossified cervical tendon, extremely pneumatized cervical vertebrae, and a habitually downward-facing snout—that have rarely, if ever, been documented in other titanosaurs, thus broadening our understanding of the anatomical diversity of this remarkable sauropod clade. The latter two features were convergently acquired by at least one penecontemporaneous diplodocoid, and may represent mutual specializations for consuming low-growing vegetation.

Systematic Paleontology

Saurischia Seeley 1887 
Sauropodomorpha Huene 1932 

Sauropoda Marsh 1878 
Titanosauriformes Salgado, Coria, and Calvo 1997 

Titanosauria Bonaparte and Coria 1993 
Lithostrotia Upchurch, Barrett, and Dodson 2004 

Sarmientosaurus gen. nov.
urn:lsid:zoobank.org:act:537DFE26-54EC-4978-AC86-E83A04FA74DE

Sarmientosaurus musacchioi sp. nov.
urn:lsid:zoobank.org:act:C1090B8D-D051-44F3-B869-8B4A0C802176


Sarmientosaurus head posture, brain & eye: Digital renderings of the skull and reconstructed brain endocast and eye of the new titanosaurian dinosaur species Sarmientosaurus musacchioi.
At left is the skull rendered semi-transparent in left side view, showing the relative size and position of the brain endocast (in blue, pink, yellow, and red) and the inferred habitual head posture. At center is the isolated brain endocast in left side view, and at right is a left/front view of the skull showing the reconstructed eyeball and its associated musculature. Scale bar equals five centimeters.
Credit: WitmerLab, Ohio University.  

Holotype. MDT-PV 2, an originally articulated cranial and cervical skeleton consisting of the nearly complete skull, the partial axis associated with its rib from the right side and articulated with the cranial part of the third cervical vertebra, a fragment of the fifth cervical vertebra, the nearly complete sixth cervical vertebra and its right rib, the partial seventh cervical vertebra, and a section of ossified cervical tendon.

Diagnosis.  Basal lithostrotian titanosaurian sauropod diagnosed by the following autapomorphies: (1) maximum (rostroventral—caudodorsal) diameter of orbit nearly 40% rostrocaudal length of cranium (as measured from tip of snout to occipital condyle); (2) complex maxilla—lacrimal articulation, with ascending ramus of maxilla embedded in and bordered laterally and medially by lacrimal dorsal process; (3) medial edge of caudal sector of maxillary ascending ramus bordering bony nasal aperture with low but well-defined ridge; (4) ‘tongue-like’ ventral process of quadratojugal that overlaps quadrate caudally; (5) separate foramina for all three branches of the trigeminal nerve; (6) absence of median venous canal connecting infundibular region to ventral part of brainstem; (7) premaxillary teeth subvertical, maxillary teeth procumbent, and dentary teeth recumbent; (8) middle cervical vertebrae with ‘strut-like’ (as opposed to ‘sheet-like’) centroprezygapophyseal laminae; (9) extremely elongate and slender ossified tendon extending along cervical series ventrolateral to vertebrae and ribs.

Etymology. Sarmiento, for the Patagonian town and the administrative department in which it is located, the latter of which has yielded numerous Cretaceous dinosaur fossils; saurus, Greek, ‘lizard.’ The specific name honors the late Dr. Eduardo Musacchio, a model scientist and educator at the Universidad Nacional de la Patagonia San Juan Bosco in Comodoro Rivadavia, Argentina.

Locality and horizon. Estancia Laguna Palacios (44°54'11.6'' S, 69°22'56.7'' W), Sierra Nevada Anticline, Golfo San Jorge Basin, south-central Chubut Province, central Patagonia, Argentina (Fig 1). Uppermost section of the Lower Member of the Upper Cretaceous Bajo Barreal Formation, Chubut Group. The specimen was found in situ in a tuffaceous sandstone that is regarded as Cenomanian—Turonian in age.



Fig 33. Comparison of titanosauriform sauropod dinosaur skulls in right lateral view.
(A) Giraffatitan brancai (redrawn and modified from Wilson and Sereno [103]). (B) Abydosaurus mcintoshi (redrawn and modified from Chure et al. [98]). (C) Sarmientosaurus musacchioi gen. et sp. nov. (D) Nemegtosaurus mongoliensis (redrawn and modified from Wilson [11]). (E) Rapetosaurus krausei (redrawn from Curry Rogers and Forster [13]). (F) Tapuiasaurus macedoi (redrawn from Zaher et al. [14]). Not to scale.

Conclusions
Sarmientosaurus musacchioi is the first titanosaurian sauropod from southern South America for which an articulated, virtually complete adult skull has been discovered. Phylogenetic analyses demonstrate that the new taxon is an archaic member of the titanosaurian subclade Lithostrotia, occupying a position more derived than Malawisaurus but more basal than taxa frequently regarded as nemegtosaurids (Nemegtosaurus, Rapetosaurus, and Tapuiasaurus) and saltasaurid titanosaurs such as Alamosaurus, Neuquensaurus, and Saltasaurus. As such, Sarmientosaurus is the most basal known titanosaur to be represented by a well-preserved skull. The new taxon exhibits a previously-undocumented cranial form that consists of an amalgam of plesiomorphic titanosauriform features such as a comparatively broad snout with a large narial fossa and a deep mandibular adductor chamber with more derived morphologies such as an elongate rostral process of the prefrontal (Figs 33 and 34). These characters offer novel cranial support for the phylogenetic hypothesis that titanosaurians are closely related to Brachiosauridae and other titanosauriforms—a hypothesis that, although now well-established, had previously been based primarily on evidence from the postcranial skeleton. Furthermore, the occurrence of the more derived lithostrotian Tapuiasaurus in the Aptian of Brazil raises the possibility that the new Patagonian taxon represents a titanosaurian ‘ghost lineage,’ the evolutionary history of which remains undocumented for almost all of the mid-Cretaceous.


Rubén D. F. Martínez , Matthew C. Lamanna, Fernando E. Novas, Ryan C. Ridgely, Gabriel A. Casal, Javier E. Martínez, Javier R. Vita and Lawrence M. Witmer. 2016. A Basal Lithostrotian Titanosaur (Dinosauria: Sauropoda) with a Complete Skull: Implications for the Evolution and Paleobiology of Titanosauria.  PLoS ONE. 11(4): e0151661. DOI: 10.1371/journal.pone.0151661

Newly discovered titanosaurian dinosaur from Argentina, Sarmientosaurus http://phy.so/380898167 via @physorg_com
Intact skull sheds light on Sarmientosaurus | The London Free Press http://www.lfpress.com/2016/04/26/heads-up-intact-skull-sheds-light-on-big-long-necked-dinosaurs

[Primatology • 2016] Phylogeny and Divergence Times of Lemurs inferred with Recent and Ancient Fossils in the Tree



Abstract

Paleontological and neontological systematics seek to answer evolutionary questions with different datasets. Phylogenies inferred for combined extant and extinct taxa provide novel insights into the evolutionary history of life. Primates have an extensive, diverse fossil record and molecular data for living and extinct taxa are rapidly becoming available. We used two models to infer the phylogeny and divergence times for living and fossil primates, the tip-dating (TD) and fossilized birth-death process (FBD). We collected new morphological data, especially on the living and extinct endemic lemurs of Madagascar. We combined the morphological data with published DNA sequences to infer near-complete (88% of lemurs) time-calibrated phylogenies. The results suggest that primates originated around the Cretaceous-Tertiary boundary, slightly earlier than indicated by the fossil record and later than previously inferred from molecular data alone. We infer novel relationships among extinct lemurs, and strong support for relationships that were previously unresolved. Dates inferred with TD were significantly older than those inferred with FBD, most likely related to an assumption of a uniform branching process in the TD compared to a birth-death process assumed in the FBD. This is the first study to combine morphological and DNA sequence data from extinct and extant primates to infer evolutionary relationships and divergence times, and our results shed new light on the tempo of lemur evolution and the efficacy of combined phylogenetic analyses.

Key words: total evidence; primatology; Bayesian phylogenetics; calibration; chronogram




James P. Herrera and Liliana M. Dávalos. 2016. Phylogeny and Divergence Times of Lemurs inferred with Recent and Ancient Fossils in the Tree. Syst Biol. (2016). DOI:  10.1093/sysbio/syw035
An exhaustive lemur family tree sheds new light on these threatened primates http://www.huffingtonpost.com/entry/lemur-family-tree_us_57190fc7e4b0d0042da87f80 via @HuffPostScience

[Botany • 2014] สายน้ำค้าง | The Genus Rhynchoglossum Blume (Gesneriaceae) in Thailand


สายน้ำหยด | Rhynchoglossum mirabilis Patthar. 


Abstract

The genus Rhynchoglossum Blume in Thailand is revised. Three species are recognised, R. obliquum Blume, R. mirabilis Patthar. and R. saccatum Patthar., the latter two newly described here and endemic to Thailand. A key to the species and illustrations are provided.

Keywords: Taxonomy; Rhynchoglossum; new species; Thailand





Nannapat Pattharahirantricin. 2014. The Genus Rhynchoglossum Blume (Gesneriaceae) in Thailand.
Thai Forest Bulletin (Botany). 42: 24–34.

[Botany • 2016] Miliusa malnadense • A New Species of Miliusa (Annonaceae) from the Western Ghats of Karnataka, India


Miliusa malnadense



Within Magnoliales, Annonaceae is the most species-rich family (Chatrou et al. 2012). Miliusa Leschenault ex De Candolle (1832: 213) is placed in tribe Miliusae, subfamily Malmeoideae, according to the recent infrafamilial classification (Chatrou et al. 2012). Chaowasku et al. (2014) provided insights into the evolutionary relationships of tribe Miliusae, and Chaowasku & Keßler (2013) reconstructed the phylogeny of Miliusa with four well-supported clades. Miliusa is distributed across the Austro-Malesian region with most species exhibiting a restricted distribution to certain areas (Mols & Kessler 2003). Species known from India exhibit a high degree of endemism (Kundu 2006).

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FIGURE 2. Miliusa malnadense.
A
. Twig showing new foliage and bud. B. Leaf. C. Monocarps. D. Lateral section of mature flower. E. Mature flower.
Photographs by Navendu Page.


Miliusa malnadense Page & Nerlekar, sp. nov., 
This species can be distinguished by the presence of pubescent young branches, coppery red young leaves, inner petals glabrous outside, apices and margins densely puberulous inside and purple coloured, carpels elongated, curved and pubescent throughout its length, ovoid-oblong stigma and globose monocarps 

Etymology:— The specific epithet ‘‘malnadense’’ refers to the Kartanaka part of the Western Ghats from Shimoga to Kodagu which is the currently known distribution range of this species.

Distribution and associated species :— Miliusa malnadense is so far known only from the Kudremukh national park in the Western Ghats mountain range which is one of the global biodiversity hotspots (Myers et al. 2000). Miliusa malnadenseis  probably  restricted  to  forests  at  elevations  above  1000  m  in  the  Shola-Grassland  ecosystem  that  harbor  significant proportion of endemic taxa (Robin & Nandini 2012). Associated species observed in the type locality were species of the genus Ochlandra Thwaites, Lasianthus Jack, Cinnamomum Schaeffer, Myristica dactyloides Gaertner, Euonymus indicus B.Heyne ex Wall. and Schefflera micrantha (C.B.Clarke) Gamble.

Conservation status:— Data Deficient.


 Navendu Page and Ashish Nerlekar. 2016. A New Species of Miliusa (Annonaceae) from the Western Ghats of Karnataka, India. Phytotaxa. 245(1):79-83 .  DOI: 10.11646/phytotaxa.245.1.10



New species of evergreen tree for India  

[Botany • 2016] Sciaphila yakushimensis • A New Mycoheterotrophic Plant (Triuridaceae) from Yakushima Island, Japan


Sciaphila yakushimensis
Suetsugu, Tsukaya & H. Ohashi 



A new species of Sciaphila (Triuridaceae), Sciaphila yakushimensis Suetsugu, Tsukaya & H. Ohashi, is described and illustrated from Yakushima Island, Kagoshima Pref., Japan. The new species is similar to S. nana, but it is clearly distinguishable by the blackish purple aerial parts, the clavate style with dense papillae, and the filaments not longer than the anthers. A key to the Japanese Sciaphila based on total flower characteristics and another based primarily on stylar characteristics are provided for convenience of easy identification of these rare mycoheterotrophic plants.

Key words: Distribution, Japan, mycoheterotrophic plants, new species, Sciaphila, Triuridaceae, Yakushima Island.




Kenji Suetsugu, Hirokazu Tsukaya and Hiroyoshi Ohashi. 2016. Sciaphila yakushimensis (Triuridaceae), A New Mycoheterotrophic Plant from Yakushima Island, Japan. Journal of Japanese Botany [J. Jpn. Bot.]91(1): 1–6  
New plant species discovered on Yakushima http://phy.so/375100878 via @physorg_com

Friday, April 29, 2016

[Botany • 2016] A Revision of Rhapis (Arecaceae)


Rhapis kebangensis Henderson sp. nov.
Phong Nga-Ke Bang National Park, Quang Binh, VIETNAM

 Abstract
A revision of the Asian palm genus Rhapis is given based on study of 167 herbarium specimens of wild origin from A, AAU, BH, BK, BKF, GH, HN, HNU, HPNP, IBSC, K, KUN, L, MO, NY, P, SYS, US and application of the Phylogenetic Species Concept to a database comprising 13 qualitative and 16 quantitative variables. Eleven species are recognized, including two new ones. Two species are divided into subspecies.

Keywords: dioecy, Palmae, Vietnam, China




Introduction
Rhapis is the name given to small, clustering, fan-leaved, dioecious palms that can form large colonies by rhizomes in the understory of tropical and subtropical Asian forests, often on limestone soils. The species are distributed from southern China through Vietnam, Laos, Thailand, and Cambodia, with an outlying population in western Sumatra. The first revision of the genus was that of Beccari (1931), where five species were recognized. Bailey (1939) recognized nine species, and in the most recent revision, Hastings (2003) recognized eight species. 

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Rhapis Linnaeus f. in Aiton (1789)

1. Rhapis evansii Henderson sp. nov.
Type:— LAOS. Vientiane: Vangvieng district, Ban Nathong, Tham Poukham, 250–350 m,
1 August 1999, T. Evans 56 (holotype K!, barcode K000462531). (Fig. 1)


2. Rhapis excelsa (Thunberg) Henry in Rehder (1930: 153).
Chamaerops excelsa Thunberg (1784: 130).
Trachycarpus excelsus (Thunberg) Wendland in Gay (1861: 429).
Lectotype (designated by Hastings 2003):— JAPAN. No locality, no date, C. Thunberg sheet number 24386 (lectotype UPS n.v., UPS image!)

3. Rhapis gracilis Burret (1930: 883).
Lectotype (here designated):— CHINA. Prov. Kwangtung: Win Foo, 180 m, 3 October 1928, S. Sin 5338 (lectotype IBSC!) (the holotype at B was destroyed)


4. Rhapis humilis Blume (1836: 54).
Lectotype (designated here):— JAPAN. No locality, no date, C. Thunberg sheet number 24385 (lectotype UPS n.v., UPS image!)


5. Rhapis kebangensis Henderson sp. nov.
Type:—VIETNAM. Quang Binh: Ba Trach district, Phong Nga-Ke Bang National Park.
20 October 2015, A. Henderson & Nguyen Quoc Dung 4048 (holotype FIPI!, isotype NY!). (Fig. 3)


6. Rhapis laosensis Beccari (1910: 225).
Lectotype (designated by Hastings 2003):—LAOS. Saraburi, no date, C. Thorel 3154 (lectotype P!, isolectotype FI!)

6a. Rhapis laosensis subsp. laosensis 
6b. Rhapis laosensis subsp. macrantha (Gagnepain) Henderson comb. & stat. nov.
 Basionym: Rhapis macrantha Gagnepain (1937: 160). 
Type:—VIETNAM. Nord-Annam, Province de Nghe-An (Vinh), Réserve forestière de Co Ba (Ke-Nhe), 15 May 1914, F. Fleury 32535 (holotype P!)


7. Rhapis micrantha Beccari (1910: 220). 
Lectotype (designated by Hastings 2003):—VIETNAM. Dong Ban mountains, Kien Khe 19 April 1884, H.-F. Bon 2345 (lectotype P!, isolectotype FI!)

8. Rhapis puhuongensis Trudgen, Tran Thi Phuong Anh & Henderson (2008: 182). 
Type:—VIETNAM. Nghe An: Quy Hop district, Pu Huong Nature Reserve, behind Reserve office, 300 m, 19°20’N, 105°10’E, 18 March 2007, X. P. Vu, V. D. Nguyen, H. Q. Bui, C. T. Nguyen R. de Kok, T. Utteridge, A. Moore, M. Briggs, M. Trudgen, V. C. Nguyen & D. D. Tran HNK 1748 (holotype HN n.v., isotypes AAU!, K!, NY!, P!)

9. Rhapis robusta Burret (1937: 587).
Lectotype (here designated):— CHINA. Kwangsi: Lungchow, 7 July 1935, S. Ko 55429 (lectotype IBSC!)(the holotype at B was destroyed)


10. Rhapis subtilis Beccari (1910: 227). 
Type:— LAOS. Lakon, 1866–1868, C. Thorel 3099 (holotype P!, isotype FI!)
10a. Rhapis subtilis subsp. subtilis 
10b. Rhapis subtilis subsp. siamensis Henderson comb. & stat. nov. 
Basionym: Rhapis siamensis Hodel (1997: 19). 
Type:—THAILAND. Phatthalung: 13 km N of Phatthalung and 5 km E of main road along side road to coast, 25 April 1997, D. Hodel & P. Vatcharakorn 1652 (holotype BK n.v., isotypes BH!, MO!)

 11. Rhapis vidalii Averyanov, Nguyen Tien Hiep & Phan Ke Loc (2006: 12). 
Type:—VIETNAM. Hoa Binh: Mai Chau district, Van Mai municipality, highway 7, 15 km post, between 20°35’N, 105°02’E and 20°34’N, 105°02’E, 300–350 m, 12 December 2002, D. Harder, N. T. Hiep, L. Averyanov, DKH 8123 (holotype HN n.v., isotype LE n.v.)


Andrew HENDERSON. 2016. A Revision of Rhapis (Arecaceae). Phytotaxa. 258(2): 137–152. DOI: 10.11646/phytotaxa.258.2.3