Published December 31, 2015 | Version v1
Taxonomic treatment Open

Achlidon Smalley 1964

Description

Achlidon Smalley, 1964b

Pseudothelphusa (Achlidon) Smalley, 1964b: 8.

Type species. Pseudothelphusa agrestis Rathbun, 1896 [by original designation].

Diagnosis. Third maxilliped with exopod about half-length or slightly greater than half-length of ischium. G1 slender, latero-mesially compressed, nearly straight, apical portion enlarged on caudo-mesial view. Marginal suture on mesial surface, not distorted to other surfaces. Spermatic channel opening, field of apical spines situated distally on apex; apex elongated, slim along caudo-cephalic axis.

Distribution. All species are distributed along central to southeastern Costa Rica in hydrographic basins from both the Caribbean and Pacific drainages.

Remarks. The relationships with the other pseudothephusid genera, inferred by the G1 morphology, were considered as unclear by Rodriguez (1982), who hypothetically placed it among the Hypolobocerini.

Notes

Published as part of Magalhães, Célio, Wehrtmann, Ingo S., Lara, Luis Rólier & Mantelatto, Fernando L., 2015, Taxonomy of the freshwater crabs of Costa Rica, with a revision of the genus Ptychophallus Smalley, 1964 (Crustacea: Decapoda: Pseudothelphusidae), pp. 301-344 in Zootaxa 3905 (3) on page 303, DOI: 10.5281/zenodo.235127

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Linked records

Additional details

Biodiversity

References

  • Smalley, A. E. (1964 b) The river crabs of Costa Rica, and the subfamilies of the Pseudothelphusidae. Tulane Studies in Zoology, 12 (1), 5 - 13.
  • Rathbun, M. J. (1896) Descriptions of two new species of fresh-water crabs from Costa Rica. Proceedings of the United States National Museum, 18 (1071), 377 - 379, pls. XIX - XXX. http: // dx. doi. org / 10.5479 / si. 00963801.18 - 1071.377
  • Rodriguez, G. (1982) Les crabes d'eau douce d'Amerique. Familie des Pseudothelphusidae. ORSTOM, Paris, 223 pp. [Faune Tropicale 22]