Comatula pectinata ( Linnaeus, 1758 )

Kogo, Ichizo, Fujita, Toshihiko & Kubodera, Tsunemi, 2019, Shallow-water Comatulids (Echinodermata: Crinoidea) from Ambon and Lombok Islands, Indonesia, Species Diversity 24, pp. 229-246 : 231-232

Comatula pectinata ( Linnaeus, 1758)

Asterias pectinata Linnaeus, 1758: 663 .

Comatula pectinata —A. H. Clark 1909a: 394; 1909b: 148; 1931: 339, pl. 20 fig. 49, pl. 33 fig. 100, pl. 34 fig. 101, pl. 35 fig. 102, pl. 36 fig. 103, pl. 37 fig. 104, pl. 38 figs 105– 107; H. L. Clark 1915: 101; A. M. Clark and Rowe 1971: 14 (key); A. M. Clark 1972: 85; Gibbs et al. 1976: 110; Fabricius 1994: 1228 (table); Liao and A. M. Clark 1995: 28, fig. 13; Rowe and Gates 1995: 148; Kogo 1998: 23, fig. 17; 2002: 7; Lane et al. 2000: 476 (table).

Comatula cf. pectinata — Messing and Tay 2016: 631, fig. 3D–F.

Actinometra pectinata — Carpenter 1888: 284, pl. 53 figs 15– 22.

Alecto purpurea Müller, 1843: 132 .

Comatula purpurea —A. H. Clark 1911a: 532; 1918: 271, pl. 14 fig. 16; 1931: 360, pl. 39 fig. 109, pl. 40 fig. 111, pl. 41 fig. 114.

Material examined. 3 specimens. Ambon Is. NSMT E-8143 (1 specimen, juvenile), E-8147 (2), Latuhalat, 10 m, December 1, 1992 .

Description. Centrodorsal thin discoidal, 1–2.2 mm across, up to 0.6 mm thick, roundish in aboral view, with cirrus sockets in 1 aligned row. Cirri VII–VIII, 11–14, 5– 8 mm long. Longest cirrals (4 th –5 th) 1.2 times longer than wide; cirrals smooth without aboral tubercle. Radials narrowly exposed, in contact laterally. IBr 2(1+2): Ibr 1 trapezoidal, in contact laterally; Ibr 2 (axil) triangular, free laterally. IIBr not present. Arms 10; anterior arms 85 mm, posterior arms 50 mm long; first syzygy at br 1+2, second usually at br 3+4. P 1 longest, 7–8 mm long, of 30–32 segments; combs of 4–7 teeth confluent with outer edge of pinnulars. Pinnule combs to P 2.

Remarks. Comatula purpurea ( Müller, 1843) was synonymized with Comatula pectinata by Rowe and Gates (1995: 148). These two species had been distinguished mainly by the arrangement of cirri (A. H. Clark 1931: 320, in key): cirri are segregated in the interradial angles in the former species, while not in the latter. The specimens (NSMT E-8143 and E-8147) show both types of cirri arrangement. We agree the synonymization by Rowe and Gates (1995).

Distribution. Singapore ( Messing and Tay 2016); Indonesia, northern Australia, Philippines (A. M. Clark and Rowe 1971); Great Barrier Reef ( Gibbs et al. 1976; Fabricius 1994); South China Sea ( Lane et al. 2000). Depth range: 0–120 m ( Lane et al. 2000).