Kraussillichirus, 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 : 111

Kraussillichirus gen. nov.

http://zoobank.org/urn:lsid:zoobank.org:act:07353B50-6C2E-

4CD3-A3DF-F37D1497A8C3

Type species. Callianassa kraussi Stebbing, 1900 , by original designation and monotypy.

Diagnosis. Anterior branchiostegal lobe sclerotised, well produced anteriorly beyond junction with oblique branchiostegal ridge with which it articulates by means of a virtual condyle. Rostrum obsolete or obtusely triangular, flat, not reaching cornea. Pleomere 1 tergite divided into 2 sections by unsclerified band; tergite weakly sclerotised, if so only posteriorly; pleura oblique thin rods independent of tergite dorsally, separated by extensive flexible region; sternite a thin transverse plate. Antennular peduncle length more than 3 times the width of both eyestalks, longer than antennal peduncle. Maxilliped 3 ischium and merus less than twice as long as wide at their articulation; crista dentata absent (or few proximal spines only); propodus about as wide as long, free distal margin transverse or nearly so; exopod present. Male major cheliped merus with denticulate blade, more prominent over proximal half of lower margin. Male minor cheliped much narrower than major, carpus longer than palm, fingers shorter than palm. Pereopod 3 propodus subpentagonal, with strong broadly rounded proximal lobe on lower margin, lower margin straight-concave or weakly convex. Pereopod 4 subchelate. Male pleopod 1 consisting of 2 articles, article 2 longer than wide, with or without slight apical notch. Male pleopod 2 appendix interna absent. Pleopods 3–5 appendices internae barely emerging from endopod margin. Uropodal endopod with convex anterior margin, acute-rounded apex, straight-slightly curved posterior margin, longer than wide. Telson with convex lateral margins and rounded posterolateral corners, posterior margin convex, with medial lobe.

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

Remarks. Callianassa kraussi was included in the subgenus Callichirus by De Man (1928) and the genus Callichirus by Sakai (2005b and later). Kraussillichirus resembles Callichirus but differs in lacking its ornamented pleomeres 3–6 and having an ovoid uropodal endopod (fig. 14o). The only species appears to be estuarine ( Hanekom and Russell, 2015; Siebert and Branch, 2005) as are species of Lepidophthalmus , which it also somewhat resembles.