DecaNet (World List of Decapoda)

Schubart, C.D.; Reimer, J.; Diesel, R. (1998). Morphological and molecular evidence for a new endemic freshwater crab, Sesarma ayatum sp. n., (Grapsidae, Sesarminae) from eastern Jamaica. Zoologica Scripta. 27(4): 373-380.

341321

10.1111/j.1463-6409.1998.tb00468.x [view]

Schubart, C.D.; Reimer, J.; Diesel, R.

1998

27(4): 373-380

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Recent morphological studies have shown that the Jamaican mountain stream crab, Sesarma bidentatum Benedict, 1892 (Sensu Abele 1992), consists of several allopatric forms. Three new species have been described from western Jamaica (summarized in Reimer et al. 1998) restricting the range of S. bidentatum to central and eastern Jamaica. In this study we used morphology and genetic markers to further distinguish crab populations from different East Jamaican river systems. Morphological characters such as the shape of male gonopods, front, chelar carpus, and walking legs, as well as mtDNA sequence (16s rRNA gene) comparisons were consistent in the separation of populations of S. bidentatum into two distinct groups. A new species, Sesarma ayatum sp. n., is described with a distribution from easternmost Jamaica to the eastern Blue Mountains.

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