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A new porcellanid species from the Caribbean Sea, with a discussion on the American "Petrolisthes lewisi-group" (Decapoda, Anomura, Porcellanidae)

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A new species of porcellanid crab, Petrolisthes hispaniolensis is described. This new species belongs to an American species assemblage, called here the P. lewisi-group, so far represented in the Caribbean Sea by P. jugosus (Streets, 1872) and P. magdalenensis Werding, 1978. The new species is clearly distinguished from the other two western Atlantic species by the shape of the carpus of the chelipeds, which bears some irregular, spine-tipped proximal teeth. The new species can also be distinguished by its coloration, as revealed by freshly collected specimens. Eine neue Porzellanide, Petrolisthes hispaniolensis wird beschrieben. Die neue Art gehört zu einer amerikanischen Artengruppe, die hier als P. lewisi-Gruppe bezeichnet wird und die im Karibischen Meer bisher durch P. jugosus (Streets, 1872) und P. magdalenensis Werding, 1978 vertreten ist. Die neue Art lässt sich leicht von den beiden anderen westatlantischen Arten an dem Carpus der Scherenbeine unterscheiden, der einige unregelmäßige spitze Zähne am proximalen Ende aufweist. Die Art ist bei frisch gesammeltem Material auch an ihrer Färbung zu erkennen.


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