Calliapagurops 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 : 108-109

Calliapagurops de Saint Laurent, 1973

Calliapagurops de Saint Laurent, 1973: 515 .— Sakai, 1999a: 8.—

Ngoc-Ho, 2002: 540–541.— Sakai, 2005b: 207.— Sakai, 2011: 492.

Type species. Calliapagurops charcoti de Saint Laurent, 1973 , 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 spine-like; anterolateral spines prominent. Pleomere 1 tergite undivided or with weak transverse ridge. Eyestalk cylindrical, with subspherical terminal pigmented cornea. Antennal scaphocerite elongate, longer than wide, with free acute tip. Maxilliped 3 ischium and merus less than twice as long as wide at their articulation; merus with 2 or more distal spines on distal free margin; 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 clearly oblique. 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 oval, lower margin convex, not proximally lobed (slightly produced distally), lower margin weakly convex. Pereopod 4 propodus minutely chelate, fixed finger as long as dactylus. Male pleopod 1 consisting of 2 articles, article 2 longer than wide, with or without slight apical notch. Male pleopod 2 appendix interna free, articulating, distal on mesial endopodal margin. Female pleopod 2 endopod 2–3 times as long as wide. Pleopods 3–5 appendices internae barely emerging from endopodal margin. Uropodal endopod with convex anterior margin, acute-rounded apex, straight-slightly curved posterior margin, longer than wide. Telson convex-sided, widest near midpoint, posterior margin concave between rounded posterolateral corners, with transverse row of robust setae.

Remarks. The two species of Calliapagurops differ from all other callianassoids in having cylindrical eyestalks with terminal cornea. Ngoc-Ho (2002) pointed out numerous similarities between Calliapagurops and Corallianassa , similarities borne out in the morphological analysis (Robles et al., in press) but not by the molecular data, where the genus is closer to Grynaminna . Sakai(2011) argued that Calliapagurops and its subfamily Calliapaguropinae belong in Eucalliacidae because of differences from Callichirus and Callichirinae , namely the absence of the dorsal oval, the unique eyestalks and a small appendix interna on the male pleopod 2. He listed no similarities to Eucalliacidae – there are few.