Tozeuma tomentosum (Baker, 1904)

Xu, Peng & Li, Xin-Zheng, 2015, Report on the Hippolytidae Bate (sensu lato) from China seas, Zoological Systematics 40 (2), pp. 107-165 : 126

Tozeuma tomentosum (Baker, 1904) ( Fig. 10 )

Tozeuma tomentosum Baker, 1904: 156 , pl. 30. Type locality: the gulfs and coast of South Australian.

Material examined. MBM046799 , 1 ovig. ♀ (cl 13.71 mm), South China Sea, 1959-2-16, st. 6091, 80 m, sandy mud, AT, no. 4-25, coll. Zhi-Can Tang ; MBM081148 , 1 ovig. ♀ (cl 14.97 mm), South China Sea, 1959-4-8, st. 6036, 102 m, mud, AT, no. S67B-1, coll. Shao-Zhong Wu ; MBM046802 , 1 ♂ (cl 6.17 mm), 1 ♀ (cl 15.36mm), South China Sea, 1959-4-25, st. 6141, 78 m, sandy mud, AT, no. L65B-34, coll. Xiu-Tong Ma.

Description. Integument hirsute, not smooth. Rostrum subequal in length to carapace, unarmed dorsally, armed ventrally with 5 teeth; lateral carina well developed, reaching behind orbital margin. Carapace with antennal tooth and strong pterygostomian tooth. Abdomen with third to fifth somites dentate posteriorly; fifth somite with 2 teeth on posteriormargin of pleura. Telson about 1.7 times as long as sixth somite; distal 1/3 of dorsal surface with 2 pairs of spines; posterior margin with 1 pair of oval-shaped spines.

Distal margin of 3 segments of antennular peduncle unarmed; stylocerite overreaching distal margin of second segment of antennular peduncle. Antennular peduncle not reaching midpoint of antennal scale. Antennal scale slender, 3.6 times as long as wide; with 1 spine distomedially.

Third maxilliped without exopod, reaching distal end of antennular peduncle; ultimate segment flattened, with 9 or 10 corneous spines distally. First pereopod thick and short; dactylus about 0.4 length of palm; chela about 2.2 times as long as carpus; merus about 1.7 times as long as carpus.

Second pereopod reaching distal end of antennular peduncle; chela small; dactylus shorter than palm; carpus subdivided into 3 articles, of which proximal one longest; merus 0.8 times as long as carpus; ischium about 0.6 times as long as merus. Ambulatory pereopods similar in structure; dactylus simple, not biunguiculate, flexor margin with 4–5 spinules; propodus with 2 rows of 8–12 spinules along entire length of flexor margin; merus generally armed with only 1 distolateral spine.

Extensor margin and distal end of dactylus each with 1 sharp spine; flexor margin of dactylus with 1 spine and 2 spinules; propodus with 7–10 spines along entire length of flexor margin; outer margin of merus armed with 1 or 2 sharp distolateral spines.

Distribution. South China Sea; Ryukyu Islands and Australian waters; 30– 120 m.

Figures

Fig. 10. Tozeuma tomentosum (Baker, 1904). A. Carapace, lateral view; B. Abdominal pleurae, lateral view; C. Antennal scale, dorsal view; D. Antennule, dorsal view; E. Telson, dorsal view; F. Third maxilliped, lateral view; G. First pereopod, lateral view; H. Second pereopod, lateral view; I. Third pereopod, lateral view; J. Dactylus of third pereopod, lateral view. Scale bars=1mm.