Oligometra serripinna ( Carpenter, 1881 )

Kogo, Ichizo, Fujita, Toshihiko & Kubodera, Tsunemi, 2019, Shallow-water Comatulids (Echinodermata: Crinoidea) from Ambon and Lombok Islands, Indonesia, Species Diversity 24, pp. 229-246 : 242

Oligometra serripinna ( Carpenter, 1881)

Antedon serripinna Carpenter, 1881: 182 .

Oligometra serripinna —A. H. Clark 1908a: 126 (list); 1918: 130; A. M. Clark and Rowe 1971: 19 (key); Vail 1987: 555; Liao and A. M. Clark 1995: 47, fig. 26; MarshallCrossland and Price 1999: 28; Messing and Tay 2016: 642, fig. 7C, D, F.

Oligometra serripinna serripinna —A. H. Clark 1947: 217.

Material examined. 10 specimens. Ambon Is. NSMT E-8120 (1 specimen), E-8123 (8), Pombo I ., 10 m, November 28, 1992; NSMT E-8166 (1), Silale, 10 m, December 3, 1992 .

Description. Centrodorsal discoidal, 1.5– 2 mm across, 1–1.5 mm thick, with cirrus sockets in 1 aligned row and flat aboral pole. Cirri X–XIV, 15–20, 6– 9 mm long. Cirrals wholly wider than long; beyond 3 rd with prominent transverse ridge; 3–4 most distal cirrals rarely with paired aboral spines. Radials narrowly exposed, in contact laterally. IBr 2: Ibr 1 oblong, free laterally; Ibr 2 (axil) pentagonal. Arms 10, 35–60 mm long; first syzygy at br 3+4. P 2 longest and stoutest, 5–6 mm long, of 12–15 segments, much longer than succeeding pinnules; middle pinnulars about 2 times longer than wide with spiny distal margin. P 1 intermediate in length between P 2 and P 3. Pa usually absent.

Distribution. Western Indian Ocean, Red Sea, Maldives, Sri Lanka, Bay of Bengal, Philippines, Indonesia, Japan (A. M. Clark and Rowe 1971); Sumatra ( MarshallCrossland and Price 1999); Singapore ( Messing and Tay 2016); Great Barrier Reef ( Vail 1987); South China Sea ( Lane et al. 2000); Taiwan (Liao and A. M. Clark 1995). Depth range: 0–90 m ( Lane et al. 2000).