Colobometridae A. H. Clark, 1909a

Obuchi, Masami, 2020, Shallow-water Comatulids (Echinodermata: Crinoidea: Comatulida) of the Ashizuri-Uwakai Sea, Shikoku Island, Southern Japan, Species Diversity 25, pp. 309-328 : 320

Family Colobometridae A. H. Clark, 1909a 22. Pontiometra andersoni ( Carpenter, 1889) [Japanese name: Tengu-umishida]

Morphology. Centrodorsal globular, 11.1 mm across; polar area flat, 0.4 times of centrodorsal diameter. Cirri remarkably elongated, LXXV, up to 76 segments, 80 mm long, arranged in three rows, distally polished; all segments broader than long; aboral spines gradually developing in distal two thirds, becoming three apexes in distal 20 segments. Radials invisible. I–VBr composed of 2 slender ossicles with L/W about 1.0, with straight lateral expansion; each ray well separated, with even Ibr 1 not laterally contact- ed. Arms 86, 140 mm long; first arm syzygy at br 3+4; distal intersyzygial intervals 16–20. Comparative pinnule length P 1 >>P 2 =P 3 =P 4 =P 5; P 1 on outer side of rays enlarged, but not so on inner side; segments smooth, L/W up to 1.8. Disk thick, stellate, three times as wide as centrodorsal.

Posture. Fully exposed on rocky pinnacles with body elevated by long cirri, forming parabolic fan.

Coloration in life. Rays light to dark brown with white blotches, sometimes with white stripes.

Distribution. Ashizuri-Uwakai Sea (this study) to Great Barrier Reef ( Rowe and Gates 1995). New Caledonia to westward to Andaman Islands (A. H. Clark 1947).

Remarks. This species has a characteristic appearance with long cirri reaching half the length of the arm. The slen- der division series and enlarged P 1 are also unique. Genus Pontiometra A. H. Clark, 1907 is monospecific.