A new species of freshwater crab of the genus Allacanthos Smalley, 1964 (Crustacea, Decapoda, Pseudothelphusidae) from southern Costa Rica, Central America

作者：Magalhaes Celio^*; Rolier Lara Luis; Wehrtmann Ingo S

来源：Zootaxa, 2010, (2604): 52-60.

• taxonomy
• Costa Rica
• Central America
• Brachyura
• Potamocarcinini
• Neotropical region

A new species of pseudothelphusid crab, Allacanthos yawi n. sp., from the Rio Volcan drainage, Puntarenas Province, southern Costa Rica, Central America, is described and illustrated. This is the second species to be assigned to the genus Allacanthos Smalley, 1964. The new species is distinguished by its congener by having a first gonopod with a mesiolaterally flattened distal portion, a concave and nearly smooth subdistal portion of the lateral and cephalic sides, a narrow marginal process with a nearly straight distal border, and a lateral lobe with a sharp tip on the apex. An amended diagnosis for Allacanthos is provided.

• 出版日期2010-9-7