Neoanchisquilla australiensis, Ahyong, 1998

Ahyong, Shane T., 1998, Review of Neoanchisquilla Moosa, 1991 and Neclorida Manning, 1995 (Crustacea: Stomatopoda: Squilloidea), with descriptions of two new species of Neoanchisquilla from the Indian Ocean, Records of the Australian Museum 50 (2), pp. 217-229 : 220-222

Neoanchisquilla australiensis n.sp.

Fig. 2

Type material. HOLOTYPE: NTM Cr 012355, female (TL 25 mm), Northwest Shelf, Western Australia, 19°58.6- 59.l'S 117°49.0-49.4'E, 43 m, beam trawl, FRV Soela , 25 June 1983.

Diagnosis. Rostral plate slightly longer than broad; triangular; apex narrow, blunt. Raptorial claw dactylus with 7 teeth. TS6-7 lateral processes broadly rounded. Abdominal carinae spined as follows: SM 6, IM 6, LT 6, MG 2-5. Telson dorsal surface with median carina and numerous undivided carinae; ventral surface lacking rows of tubercles lateral to postanal carina.

Description of hoiotype. TL 25 mm. Eye small; stalk moderately inflated; cornea bilobed, extending slightly beyond A1 peduncle segment 1; Cl 421. A1 peduncle O.85CL. Al somite dorsal processes with acute apices. Antennal scale length 0.48CL. Rostral plate slightly longer than broad; triangular; apex rounded. Carapace anterior width O.50CL; anterolateral spines small, not extending

to base of rostral plate. Raptorial claw dactylus with 7 teeth. TS6-7 lateral processes broadly rounded. TS8 sternal keel subtruncate. AS 6 with blunt tubercle anterior to uropodal articulation. Abdominal carinae spined as follows: SM 6, IM 6, LT 6, MG 2-5. Telson prelaterallobe faintly

indicated, longer than margin of lateral tooth; denticles 7, 12-14, 1. Dorsolateral surface lacking accessory median carina; with six, well-developed supplementary longitudinal carinae; proximally with short, irregular carina and tubercles adjacentto median carina. Carinae of primary

teeth sinuous, irregular. Telson ventral surface with long, smooth postanal carina, lacking carinae or tubercles laterally, extending about 0.8 distance between anal pore and posterior margin. Uropodal protopod inner margin armed with 11 slender spines; with rounded, flattened ventral lobe anterior to endopod articulation. Terminal spines of uropodal protopod with lobe on outer margin of inner spine rounded, broader than adjacent spine, proximal margin concave. Uropodal exopod proximal segment with 6 graded movable spines on outer margin, distal 2 flattened with acute apices, distalmost slightly exceeding midlength of distal segment. Exopod distal segment shorter than proximal segment. Uropodal exopod proximal segment lacking tubercles ventrally, adjacent to articulation with protoPQd.

Measurements. Holotype female: TL 25 mm, CL 5.9 mm, CW lA mm, Al peduncle length 5.0 mm.

Colour in alcohol. Almost completely faded. Dark pigmentation around reflected marginal carina of the carapace; occasional scattered chromatophores laterally. A2 scale with black apex.

Remarks. The similarities and differences between N. australiensis and N. tuberculata are outlined under the account of the latter. Neoanchisquilla australiensis differs from N. semblatae in bearing seven instead of eight teeth on the dactylus of the raptorial claw; the rostral plate is triangular with a blunt, narrow apex, fewer intermediate carinae on the abdominal somites are armed, and the prelateral lobe of the telson is relatively longer.

Distribution. Known only from the type locality, the Australian Northwest Shelf.