Colossendeis mycterismos, Bamber, Roger N., 2004

Bamber, Roger N., 2004, with description of three new species, Zootaxa 458, pp. 1-12 : 7-9

Colossendeis mycterismos sp. nov. ( Fig. 3 )

Material: 1 adult specimen, holotype (MNHN­Py 1027), station DW47, East coast of Taiwan, N/ O 'Fishery Researcher 1', TAIWAN 2000, 22º56.0'N 121º25.6'E, 498 m; 02/08/ 2000, coll. Bouchet, Richer­IRD & Chan.

Description: a comparatively small Colossendeis , trunk ( Fig. 3 A, B) typical of the genus, glabrous, unarticulated and without tubercles on lateral processes or anterior of cephalon; lateral processes separated by less than their own diameter. Ocular tubercle a tall dome bearing a distal pointed “spire”; anterior eyes evident, unpigmented. Abdomen fusiform, held above the horizontal, extending to tip of first coxa of fourth leg. Proboscis longer than trunk, widest at one­third its length, thence tapering rapidly distally (form C2 of Fry and Hedgpeth, 1969); initially rising from the cephalon, distally turning down.

Palp ( Fig. 3 A) of 10 articles, third and fifth articles (P3 and P5) of equal length, P6 to P10 subequal. Oviger of 10 articles, articles 4 and 6 elongate, slender; strigilis ( Fig. 3 C)with simply crenulate compound spines on articles 7 to 10, terminal claw nearly half length of tenth article, not forming pseudochela, but with flattened expansion along ventral margin.

Third leg ( Fig. 3 D, E) coxae subequal, naked; long articles sparsely setose, femur shorter than first tibia, second tibia longest; tarsus two­thirds length of propodus, main claw one quarter length of propodus, these three together one fifth length of second tibia (‘brevitarsal’).

Measurements of holotype (mm): trunk length (anterior of cephalon to tip of 4th lateral process) 4.1; width across 2nd lateral processes 1.7; proboscis length 5.33; palp article 3 (P3) 2.35, P5 2.35, P6 0.66, P7 0.66, P8 0.55, P9 0.55, P10 0.66; third leg, first coxa 0.59, second coxa 0.6, third coxa 0.59, femur 9.5, first tibia 12.24, second tibia 13.53, tarsus 1.0, propodus 1.5, main claw 0.4.

Etymology: from the Greek ‘ mykterismos ’, meaning ‘turning up the nose, sneering’, alluding to the holotype holding its proboscis in a raised position (adjective).

Remarks: There is no described species of Colossendeis with sixth and seventh palp articles subequal and tarsus two­thirds of the propodus length. With the third and fifth palp articles subequal, and a narrowly tapering proboscis, the present species resembles the Melanesian species C. pipetta and C. sinuosa ; however, both of those species have their proboscides distally tubular, and tarsus longer than propodus. Gonopores were not evident, so the gender of the present specimen is not known.

Figures

FIGURE 3. Colossendeis mycterismos sp. nov., holotype, A, body, lateral; B, body, dorsal; C, distal oviger articles, with detail of terminal claw and compound spine; D, third leg; E, distal articles of third leg. Scale line = 2.5 mm for A and B, 1 mm for C and E, 4 mm for D.