Corallianassa Manning, 1987

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 : 109

Corallianassa Manning, 1987

Corallianassa Manning, 1987: 392–394 .— Poore, 2004: 184.— Ngoc-Ho, 2005: 71 .— Komai et al., 2015: 54–55 (synonymy).

Corallichirus Manning, 1992: 571–574 .— Sakai, 2011: 422–423 (type species: Corallianassa xutha Manning, 1988 , by original designation).

Type species. Callianassa longiventris A. Milne-Edwards, 1870 , by original designation.

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 spine-like; anterolateral spines prominent. Pleomere 1 tergite undivided or with weak transverse ridge. Maxilliped 3 ischium and merus linear, around twice as long as wide at their articulation; crista dentata of few separate spines proximally and toothed ridge distally overlapping proximal margin of merus; propodus about as wide as long, free distal margin transverse or nearly so. Male major cheliped merus with row of sharp oblique spines, usually 2 proximally and 1 or more along length of lower margin. Male minor cheliped half or more as wide as major, carpus as long as or shorter than palm, fingers as long as or longer than palm.Pereopod 3 propodus subpentagonal, with strong broadly rounded proximal lobe on lower margin, lower margin straight-concave, lower margin straight or weakly concave or weakly convex. Pereopod 4 subchelate. Male pleopod 1 consisting of 2 articles, article 2 ovoid, with shallow apical notch between rounded subdistal lobe and curved acute apex. Male pleopod 2 appendix interna free, articulating, distal on mesial endopod margin. Pleopods 3–5 appendices internae longer than wide, clearly emerging from margin of endopod. Uropodal endopod with convex anterior margin, acute-rounded apex, straight-slightly curved posterior margin, longer than wide. Telson converging to about half basal width from near anterior width over most of length to rounded posterolateral corners, posterior margin straight or with slight medial lobe.

Remarks. Corallianassa is best recognised by the prominent anterolateral spines, the hemispherical, elevated, distal cornea (distinguishing it from Calliapagurops ) and the absence of marginal teeth on the chelipeds (distinguishing it from Glypturus ; see Komai et al., 2015). Komai et al. (2015) reviewed the complex taxonomic history of Corallianassa , Corallichirus and Glypturus , and the unjustified confusion introduced by Sakai’s (2011) revival of Corallichirus , regarded as a synonym of Corallianassa since this was first proposed by Ngoc-Ho (2005).