Taxonomy of the freshwater crab Coccusa cristicervix Ng & Grinang, 2004 (Decapoda: Brachyura: Gecarcinucidae), with description of a new species of Thelphusula from Sarawak, Malaysia, Borneo

The taxonomy of the Sarawakian gecarcinucid freshwater crab Coccusa cristicervix Ng & Grinang, 2004, is revised with the recent discovery of males, and the species is transferred to Thelphusula Bott, 1969. The male abdomen, fi rst and second gonopods are described and fi gured for the fi rst time. A new species, Thelphusula pueh, is also described from swampy habitats in Kampung Sebako in Pueh, Lundu District, Sarawak

Biodiversity into your hands - A call for a virtual global natural history 'metacollection'

10.1186/1742-9994-10-55Frontiers in Zoology101

Range extensions along western Atlantic for Epialtidae crabs (Brachyura, Majoidea) genera Acanthonyx Latreille, 1828 and Epialtus H. Milne Edwards, 1834

The present study provided information extending the known geographical distribution of three species of majoid crabs, the epialtids Acanthonyx dissimulatus Coelho, 1993, Epialtus bituberculatus H. Milne Edwards, 1834, and E. brasiliensis Dana, 1852. Specimens of both genera from different carcinological collections were studied by comparing morphological characters. We provide new data that extends the geographical distributions of E. bituberculatus to the coast of the states of Paraná and Santa Catarina (Brazil), and offer new records from Belize and Costa Rica. Epialtus brasiliensis is recorded for the first time in the state of Rio Grande do Sul (Brazil), and A. dissimulatus is reported from Quintana Roo, Mexico. The distribution of A. dissimulatus, previously known as endemic to Brazil, has a gap between the states of Espírito Santo and Rio de Janeiro. However, this restricted southern distribution is herein amplified by the Mexican specimens