Jocullianassa, 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 : 95

Jocullianassa gen. nov.

http://zoobank.org/urn:lsid:zoobank.org:act:1AC3D163-8895-

45EF-8EC6-E87B435B9FDF

Type species. Callianassa joculatrix De Man, 1905 , by present designation.

Diagnosis. Rostrum acute, anteriorly directed, as long as eyestalks. Pleomere 1 tergite fused, divided into 2 sections by transverse step. Cornea with scattered reduced pigmentation. Antennular peduncle articles 2 and 3 with single lateral row of 6–10 well-spaced long setae along lower margin. Antennal scaphocerite simple, longer than wide, acute. Maxilliped 3 merus tapering, not mesially produced, longer than wide at ischium-merus suture. Male major cheliped merus with proximal perpendicular spine on lower margin; propodus distal margin with deep notch at base of fixed finger. Pereopod 3 propodus bean-shaped, lower margin concave, leading to broadly rounded proximal lobe. Male pleopod 2 absent. Uropodal endopod ovoid, usually longer than wide, anterior margin straight or slightly convex, posterodistal margin evenly convex. Uropodal exopod about 1.5–1.8 times as long as wide, distal margin clearly differentiated from anterior margin, anterodistal corner right-angled, 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. Jocullianassa joculatrix is relatively easily recognised by the combination of its acute rostrum, sharp basal spine on the merus of the major cheliped and the excavate lower margin of the propodus on pereopod 3 ( Komai and Tachikawa, 2008). Jocullianassa joculatrix is far removed from the type species of Trypaea , the genus in which it was included by Sakai (2011). The species is common in collections from the Indo-West Pacific.