Clarkcomanthus littoralis ( Carpenter, 1888 )

Kogo, Ichizo, Fujita, Toshihiko & Kubodera, Tsunemi, 2019, Shallow-water Comatulids (Echinodermata: Crinoidea) from Ambon and Lombok Islands, Indonesia, Species Diversity 24, pp. 229-246 : 235

Clarkcomanthus littoralis ( Carpenter, 1888)

Actinometra littoralis Carpenter, 1888: 346 , pl. 67 figs 1, 2.

Clarkcomanthus littoralis — Rowe et al. 1986: 236, fig. 7c–f; Fabricius 1994: 1228 (table); Messing 1994: 239 (list); 1998b: 189 (table); 2007: 97; Rowe and Gates 1995: 141; Kogo 1998: 51, fig. 40; MarshallCrossland and Price 1999: 25; Pilcher and Messing 2001: 16 (table); Kirkendale and Messing 2003: 529; Kogo and Fujita 2005: 335; Summers et al. 2014: 336.

Material examined. 19 specimens. Ambon Is. NSMT E-8169 (1 specimen), E-8180 (1), Eri, 10 m, December 4, 1992 . Lombok Is. NSMT E-8199 (3), Gili Air I ., February 3, 1994; NSMT E-8206 (1), E-8212 (1), E-8216 (1), E-8222 (1), E-8223 (1), E-8225 (2), E-8229 (1), E-8230 (1), E-8234 (1), E-8238 (1), Gili Air I ., February 5, 1994; NSMT E-8251 (2), E-8254 (1), Kodek, February 15, 1994 .

Description. Centrodorsal small, discoidal, circular, pentagonal or stellate in aboral view, 2–3 mm across, up to 0.5 mm thick, with 0–12 cirrus sockets in 1 aligned row. Cirri absent or weak, if present, up to X, 11–13, 6– 8 mm long. Longest cirrals (4 th –6 th) about 1.5 times longer than wide; 2–3 most distal cirrals with a small aboral spine or tubercle. Radials narrowly exposed, in contact laterally. IBr 2: Ibr 1 oblong, in contact laterally; Ibr 2 (axil) triangular or low pentagonal, free laterally. IIBr and IIIBr 4(3+4) or 2. Arms 14– c. 50; anterior arms 85–130 mm, posterior arms 35–80mm long; first syzygy at br 3+4. PII longest, 14–26 mm long, of 36–48 segments; combs of 6–11 teeth confluent with outer edge of pinnulars; distal pinnulars often with secondary tooth. Pinnule combs to P 2.

Distribution. Western, northern, and eastern Australia, Indonesia, Melanesia ( Rowe et al. 1986); Sulu Sea ( Messing 1998b, 2007); Great Barrier Reef ( Fabricius 1994); Papua New Guinea ( Messing 1994); Micronesia ( Messing 1998b, 2007; Kirkendale and Messing 2003; Japan ( Kogo 1998; Pilcher and Messing 2001; Kogo and Fujita 2005). Depth range: 1–144 m ( Rowe et al. 1986).