Jara, Carlos G., Marcos Pérez-Losada, and Keith A. Crandall. (2003). A new species of freshwater anomuran crab of the genus Aegla Leach, 1821 (Crustacea: Decapoda: Aeglidae) from the Nahuelbuta Coastal Range, Chile. Proceedings of the Biological Society of Washington. 116(4):954-963.

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Jara, Carlos G., Marcos Pérez-Losada, and Keith A. Crandall

2003

116(4):954-963

Publication

Available for editors   [request]

Aegla occidentalis, a new species of the family Aeglidae, is described from the Tucapel River basin, on the western slope of the Nahuelbuta Coastal Range, in Chile. Morphologically, the new species closely resembles A. laevis (Latreille) from Central Chile but differs in having the apex of the carpal lobe of the chelipeds topped by two to four blunt scales mixed with a group of short, stout setae, the dorsum of the palmar crest slightly, if at all, concave, and the distal half of the subligulate rostrum not distorted. The morphological similarity between A. occidentalis and A. laevis contrasts with the high degree of genetic divergence between these two taxa, based on mtDNA sequence analysis. Our molecular results show A. occidentalis and Aegla bahamondei Jara to be sister species, with a 1.4%–1.6% average pairwise sequence divergence, compared with 5.9%–7.4% between A. occidentalis and A. laevis.

America, South

Crustacea

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