Petasometra clarae ( Hartlaub, 1890 )

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

Petasometra clarae ( Hartlaub, 1890)

Antedon clarae Hartlaub, 1890: 174 ; 1891: 41, pl. 2 fig. 19.

Cyllometra clarae —A. H. Clark 1912a: 158.

Petasometra clarae —A. H. Clark 1918: 113; 1947: 109, pl. 13 figs 62–64; A. M. Clark and Rowe 1971: 20 (key); Fabricius 1994: 1228 (table); Messing 1994: 239 (list); 1998b: 189 (table); Rowe and Gates 1995: 137.

Material examined. 2 specimens. Lombok Is. NSMT E-8201 (2 specimens), Gili Air I ., February 3, 1994.

Description. Centrodorsal discoidal, about 3 mm across, 1 mm thick, with cirrus sockets compactly in 1 aligned row and flat aboral pole. Cirri XV–XVI, 24, 11– 13 mm long; cirrals wholly shorter than long; beyond 4 th with transverse ridge. Radials narrowly exposed, in contact laterally at base. IBr 2: Ibr 1 oblong, free laterally; Ibr 2 (axil) pentagonal. IIBr 4(3+4). Division series with aboral synarthrial tubercle and weak adambulacral processes. Arms 10–12, 35– 65 mm long; first syzygy at br 3+4. P 2 longest, 7–8 mm long, of 18–21 segments, much longer than succeeding pinnules; middle pinnulars about 1.5 times longer than wide with smooth distal margin. P 1 similar to P 2, slightly shorter. Pa always, Pb sometimes absent.

Distribution. Indonesia (A. M. Clark and Rowe 1971); western, northern, and eastern Australia ( Rowe and Gates 1995); Papua New Guinea ( Messing 1994, 1998b). Depth range: 0–40 m ( Rowe and Gates 1995).