Coriollianassa, Poore & Dworschak & Robles & Mantelatto & Felder, 2019

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 : 93

Coriollianassa gen. nov.

http://zoobank.org/urn:lsid:zoobank.org:act:A26A8A5B-426A-

4110-9945-31A8B1F5831B

Type species. Callianassa coriolisae Ngoc-Ho, 2014, by present designation.

Diagnosis. Rostrum acute, anteriorly directed, as long as eyestalks, with a ventral keel. Pleomere 1 tergite fused, divided into 2 sections by transverse step. Cornea with scattered reduced pigmentation. Antennular peduncle exceeded by all or most of antennal peduncular article 5; articles 2 and 3 with single lateral row of 6–10 well-spaced long setae along lower margin. Antennal scaphocerite bifid. Maxilliped 3 merus distally oblique with obtuse angle between distal and lower margins, longer than wide at ischium-merus suture; crista dentata a prominent toothed ridge extending beyond proximal margin of merus. Male major cheliped merus with proximal curved spine on lower margin; carpus articulating by means of a short neck with merus. Pereopod 3 propodus oval, lower margin slightly convex, leading to narrow sharply rounded proximal lobe. Male pleopod 2 present or absent. Uropodal endopod ovoid, usually longer than wide, anterior margin straight or slightly convex, posterodistal margin evenly convex, with facial spiniform setae on rib. Uropodal exopod about 1.5– 1.8 times as long as wide, posterodistal margin with row of 6–8 long blade-like setae proximal to long setae on distal margin. Telson anterolateral lobe obsolete, undefined.

Etymology. An alliteration of the name of the type species and Callianassa , type genus of the family.

Remarks. Robles et al. (in press) recognised a well-defined genus on molecular and morphological grounds. Two of the four species included were undescribed. The genus is defined by the sharp anteriorly directed rostrum with a ventral keel, the long antennal peduncle, bifid scaphocerite, the unusual neck at the base of the carpus of the chelipeds and the usually bifid meral tooth on the major cheliped. Ngoc-Ho (2014) recognised the similarity between C. coriolisae and C. sibogae , notably the characteristic chelipeds, and realised their differences from Cheramus where they had been placed.