Himerometridae A. H. Clark, 1908b

Kogo, Ichizo, Fujita, Toshihiko & Kubodera, Tsunemi, 2019, Shallow-water Comatulids (Echinodermata: Crinoidea) from Ambon and Lombok Islands, Indonesia, Species Diversity 24, pp. 229-246 : 239

Family Himerometridae A. H. Clark, 1908b Himerometra robustipinna ( Carpenter, 1881)

Actinometra robustipinna Carpenter, 1881: 201 ; 1888: 330 (key).

Himerometra robustipinna —A. H. Clark 1908c: 213; 1909c: 7 (list); 1913: 25; 1918: 74 (key); 1941: 193, pl. 16 fig. 60, pl. 17 fig. 63, pl. 18 figs 68, 69; H. L. Clark 1946: 42; A. M. Clark and Rowe 1971: 21 (key); Gibbs et al. 1976: 111; Meyer et al. 1984: 180; Fabricius 1994: 1228 (table); Messing 1994: 239 (list); 1998b: 189 (table); Rowe and Gates 1995: 155; Kogo 1998: 59, fig. 47; MarshallCrossland and Price 1999: 27; Lane et al. 2000: 476 (table); Pilcher and Messing 2001: 16 (table); Kogo and Fujita 2005: 337; Mekhova and Britayev 2012: 912; Messing and Tay 2016: 644.

Antedon kraepelini Hartlaub, 1890: 183 .

Himerometra kraepelini — Reichensperger 1913: 96.

Antedon crassipinna Hartlaub, 1891: 32 , pl. 1 figs 1, 3, 5.

Himerometra crassipinna — Reichensperger 1913: 98.

Antedon inopinata Bell, 1894: 398 .

Material examined. 3 specimens. Ambon Is. NSMT E-8103 (1 specimen), Pombo I ., 10 m, November 25, 1992. Lombok Is. NSMT E-8204 (1), Kodek , February 15, 1994; NSMT E-8257 (1), Gili Air I ., February 3, 1994.

Description. Centrodorsal large, thick discoidal or low hemispherical, 7–10 mm across, 3–4 mm thick, with cirrus sockets in 2–3 crowded rows; aboral pole deeply concave. Cirri long and stout, XXXII–LVIII, 26–35, 25– 32 mm long. Proximal cirrals mostly as long as wide; 7–10 distal cirrals slightly shorter than wide with blunt aboral tubercle. Radials wholly concealed by centrodorsal. IBr 2: Ibr 1 oblong, proximal angle in contact laterally; Ibr 2 (axil) low pentagonal, free laterally. IIBr 4(3+4), rarely 2. IIIBr 2 or 4(3+4). IVBr 4(3+4), usually arising from outer sides of IIIBr. Arms 42–50, 85– 125 mm long; first syzygy at br 3+4; middle-distal brachials about 3 times wider than long. PII longest and stoutest, 18 mm long, of 23–28 segments; proximal pinnulars much larger than distal ones. PII–PIV similar in shape, excessively stouter and longer than succeeding pinnules.

Distribution. Sri Lanka, Bay of Bengal, Indonesia, northern Australia, Philippines, China, South Pacific Ocean (A. M. Clark and Rowe 1971); southern Vietnam ( Mekhova and Britayev 2012); Sumatra ( MarshallCrossland and Price 1999); Singapore ( Messing and Tay 2016); western, northern, and eastern Australia ( Rowe and Gates 1995); Papua New Guinea ( Messing 1994, 1998b); South China Sea ( Lane et al. 2000); Japan (A. M. Clark and Rowe 1971; Kogo 1998; Kogo and Fujita 2005). Depth range: 0–57 m ( Lane et al. 2000).