Anacalliax de Saint Laurent, 1973

Poore, Gary C. B., Dworschak, Peter C., Robles, Rafael, Mantelatto, Fernando L. & Felder, Darryl L., 2019, A new classification of Callianassidae and related families (Crustacea: Decapoda: Axiidea) derived from a molecular phylogeny with morphological support, Memoirs of Museum Victoria (Mem. Mus. Vic.) 78, pp. 73-146 : 82

Anacalliax de Saint Laurent, 1973

Anacalliax de Saint Laurent, 1973: 515 .— Manning and Felder, 1991: 786–787.— Sakai, 1999a: 126.— Sakai, 2005b: 210.— Sakai, 2011: 343.

Anacalliaopsis Sakai, 2011: 342 (type species: Callianassa agassizi Biffar, 1971 , by original designation and monotypy) syn. nov.

Type species. Callianassa argentinensis Biffar, 1971b , by original designation and monotypy.

Diagnosis. With characters of the family.

Remarks. The genus is the sole member of the family. Sakai (2011) erected a new genus Anacalliaopsis for a single species Callianassa agassizi . He did not explain how the species differed from Anacalliax argentinensis except in his key where the only difference was in the posterior margin of the telson (other characters used are identical or not compared). Anacalliax argentinensis has a concave margin whereas A. agassizi has a convex margin, differences that, if substantiated, would be best treated at species level. Otherwise, the two share similar maxillipeds, chelipeds and pleopods.