Exhippolysmata ensirostris ensirostris ( Kemp, 1914 )

Xu, Peng & Li, Xin-Zheng, 2015, Report on the Hippolytidae Bate (sensu lato) from China seas, Zoological Systematics 40 (2), pp. 107-165 : 128

Exhippolysmata ensirostris ensirostris ( Kemp, 1914) ( Fig. 11 )

Hippolysmata ensirostris Kemp, 1914: 113 , 118, figs. 1–4. Type locality: Colombo , Sri Lanka.

Hippolysmata (Exhippolysmata) ensirostris Holthuis, 1947: 74 .

Exhippolysmata ensirostris ensirostris Chace, 1997: 65 .

Material examined. MBM042360 , 5 ovig. ♀ (cl 9.28–13.16 mm), East China Sea, 1959-12-9, st. 4082, 81m, sand and gravel, AT, no. D143B-23, coll. Yu-Heng Cui.

Description. Long rostrum with apically upwards; 1.9 times longer than carapace; carapace with dentate crest in midline at base of rostrum; rostral crest composed of 7–12 teeth, followed by 2–6 teeth on remaining dorsal margin of rostrum; ventral margin armed with 7–16 teeth; carapace with antennal and pterygostomian teeth.

Pleura of fifth abdominal somites with small posteroventral tooth; sixth somite 1.3 times as long as fifth. Telson about 1.9 times as long as sixth abdominal somite; dorsal surface with 2 pairs of dorsolateral spines; posterior margin with 1 pairs of spines and 1 mesial pair of stiff setulose setae.

Basal segment of antennular peduncle suequal in length to distal two segments combined. Stylocerite not reaching end of basal segment. Third segment with small marginal spine on top of segment. Antennal scale 2.9 times as long as wide, with distolateral tooth falling short of rounded distal margin of blade.

Third maxilliped reaching distal margin of antennal scale, with developed exopod; ultimate segment with 5–8 corneous spines distally. First pereopod reaching middle of antennal scale with chela not expanded. Second pereopod reaching or slightly overreaching disal margin of antennal scale, distal of ischium with one sub-article; merus subdivided into 7–10 articles and carpus subdivided into 12–22 articles. Third to fifth pereopods with similar structure; merus with 7–12 acute spines, dactylus unguiculate with three spines on flexor margin; flexor margin of propodus with many slender spinules.

Distribution. East China Sea, South China Sea; India, Sri Lanka, Burma, and Sumatra and Java, Indonesia; 1– 100 m.

Figures

Fig. 11. Exhippolysmata ensirostris ensirostris (Kemp, 1914). A. Carapace, lateral view; B. Abdominal pleurae, lateral view; C. Antennular peduncle and antennal scale, dorsal view; D. Third maxilliped, lateral view; E. First pereopod, lateral view; F. Second pereopod, lateral view; G. Third pereopod, lateral view. Scale bars=1mm.