Allacanthos Smalley, 1964

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), Zootaxa 3905 (3), pp. 301-344 : 326

publication ID	https://doi.org/ 10.5281/zenodo.235127
DOI	https://doi.org/10.5281/zenodo.5491534
persistent identifier	https://treatment.plazi.org/id/710D87BB-290F-1611-D6BD-FC56FE2BFA67
treatment provided by	Plazi
scientific name	Allacanthos Smalley, 1964
status

Treatment

Allacanthos Smalley, 1964 View in CoL

Pseudothelphusa (Allacanthos) Smalley, 1964b: 8

Type species. Allacanthos pittieri ( Rathbun, 1896) [by original designation].

Diagnosis. Exognath of third maxilliped between 0.6 to 0.7 times the length of endognath ischium. G1 straight, spermatic channel emerging on cephalic side; subdistal portion of mesio-cephalic, lateral sides with field of minute spines; marginal suture on mesial side, straight along most of stem; marginal process simple, short; distal part with large mesial lobe, narrow lateral lobe; field of apical spines weakly developed on internal surface of lateral lobe.

Distribution. The species of this genus are distributed in southeastern Costa Rica and western Panama, Pacific drainage.

Remarks. The relationships with other pseudothephusid genera, inferred by the G1 morphology, were discussed by Rodriguez (1982).

Kingdom	Animalia
Phylum	Arthropoda
Class	Malacostraca
Order	Decapoda
Family	Pseudothelphusidae