Tuesday, June 20, 2017

[Crustacea • 2017] Strongly Carinate Species of Alpheopsis Coutière, 1897 (Malacostraca: Decapoda: Alpheidae) of the Tropical Atlantic and eastern Pacific, with Redescription of A. trigona (Rathbun, 1901) and Description of Three New Species


Alpheopsis paratrigona  Anker, 2017 


Abstract

The present study deals with four species of the alpheid shrimp genus Alpheopsis Coutière, 1897 characterised by the presence of at least one strong carina on the dorsal surface of the carapace. Alpheopsis trigona (Rathbun, 1901) is redescribed based on the holotype from Puerto Rico and additional material from US Virgin Islands and Florida. Two new species closely related to A. trigona, viz. Alpheopsis paratrigona sp. nov. and Alpheopsis gotrina sp. nov., are described, the first based on material from several localities in the tropical western Atlantic, and the second from the Pacific coast of Panama and Colombia. The three species together form a distinctive transisthmian clade within Alpheopsis, the A. trigona species complex, characterised by the presence of several strong longitudinal carinae on the carapace and very distinctive colour pattern. A more distantly related species, Alpheopsis aristoteles sp. nov., characterised by the presence of only one strong mid-dorsal carina in the anterior region of the carapace, is described based on material from São Tomé Island in the tropical eastern Atlantic.

Keywords: Crustacea, Caridea, marine shrimp, biodiversity, East Pacific, West Atlantic, East Atlantic, Caribbean Sea, Gulf of Guinea

Taxonomy 
Family Alpheidae Rafinesque, 1815 
Alpheopsis Coutière, 1897 

Alpheopsis paratrigona sp. nov.

Etymology. The specific name refers to the general resemblance of the new species to A. trigona.

Alpheopsis paratrigona sp. nov., male holotype (cl 4.5 mm) from Portobelo, Caribbean coast of Panama (MZUSP34222).
Photograph: A. Anker. 

Alpheopsis gotrina sp. nov.

Etymology. The new species’ name is an anagram of the specific epithet of its presumed closest relative, A. trigona.


Alpheopsis aristoteles sp. nov.

Etymology. The new species is named after the great Greek philosopher and scientist, Aristoteles (384–322BCE), and also the first naturalist who attempted a classification of animals based on morphology, anatomy and reproductive systems, in his famous “History of Animals” (Aristoteles 350 BCE).


Arthur Anker. 2017. Strongly Carinate Species of Alpheopsis Coutière, 1897 of the Tropical Atlantic and eastern Pacific, with Redescription of A. trigona (Rathbun, 1901) and Description of Three New Species (Malacostraca: Decapoda: Alpheidae). Zootaxa. 4277(2); 199–227. DOI:  10.11646/zootaxa.4277.2.2

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