Athanopsis Coutière, 1897

Anker, Arthur, 2023, Alpheid shrimps of the genera Athanas Leach, 1814, Athanopsis Coutière, 1897 and Pseudathanas Bruce, 1983 of the coasts of the Arabian Peninsula (Malacostraca: Decapoda: Caridea), Zootaxa 5383 (2), pp. 179-215 : 194-195

Genus Athanopsis Coutière, 1897

Athanopsis Coutière 1897: 301 .

Emended diagnosis. Body not compressed, not particularly slender. Carapace smooth, unarmed dorsally and laterally, occasionally with small postrostral tubercle. Rostrum broadly triangular in dorsal view, often narrowing distally, unarmed dorsally and ventrally; tip rounded or truncate in lateral view. Orbital teeth present, small, bluntly triangular. Pterygostomial angle rounded, not protruding; branchiostegite with scarce setae; cardiac notch well developed. All pleonites with distoventrally rounded pleura; sixth pleuron with articulated plate. Telson broad, with two pairs of small to minute spiniform setae on dorsal surface; posterior margin rounded, with two pairs of spiniform setae; anal tubercles absent. Eyes well developed, partly visible or concealed in dorsal view; cornea slightly reduced but well pigmented. Antennular peduncle stout, short; stylocerite well developed, distally blunt or subacute, overreaching distal margin of first article, sometimes exceeding distal margin of second article; ventromesial carina armed with strong tooth; second article short, subquadrate; lateral flagellum with short fused portion and well-developed accessory ramus with aesthetascs. Antenna with basicerite stout, armed with small, sharp tooth; scaphocerite with broad blade and stout distolateral tooth. Mandible with two-articulated palp; molar and incisor processes well developed. Third maxilliped with well-developed exopod; coxa with acutely produced lateral plate; ultimate article tapering into corneous tip, latter usually armed with some spiniform or stiff setae. First pereiopods (= chelipeds) enlarged in both sexes, typically unequal in size and asymmetrical in shape, sometimes subequal and subsymmetrical, carried flexed beneath body when not in use; ischium robust, with dorsal margin typically armed with spiniform setae; merus with smooth margins, ventral surface deeply excavated; carpus short, cup-shaped, without setal rows on mesial surface; chelae usually greatly swollen; palm with or without small tubercles and setal brushes on ventral surface or fingers; fingers of major chela armed with variously shaped teeth, without snapping mechanism. Second pereiopod with ischium unarmed; carpus with five subarticles; chela simple, without modifications. Third and fourth pereiopods moderately stout; ischium armed with typically two spiniform setae; merus unarmed or armed with spiniform setae, its distolateral margin often projecting as subacute tooth; propodus with several spiniform setae; dactylus simple, conical. Fifth pereiopod with ischium unarmed or armed with one spiniform seta; merus with or without spiniform setae; propodus with spiniform setae and short cleaning brush; dactylus simple. Second male pleopod with appendix masculina shorter or subequal in length to appendix interna; second female pleopod with appendix interna only. Uropodal protopod with enlarged, distally produced lateral lobe; exopod with diaeresis straight for most part, unarmed. Gill-exopod formula provided in Table 2 .

1, 2, 3

same remarks as for Table 1.

Species included. Type species A. platyrhynchus Coutière 1897 ; A. dentipes Miya, 1980 ; A. brevirostris Banner & Banner, 1981 ; A. australis Banner & Banner, 1982 ; A. rubricinctuta Berggren, 1991 ; A. saurus Anker 2011 ; A. gotoi Anker, 2012 ; A. tarahomii Marin, Sheibani & Sari, 2014 ; A. dawa sp. nov. (described below).