Heterometra amboinae (A. H. Clark, 1912a )

Kogo, Ichizo, Fujita, Toshihiko & Kubodera, Tsunemi, 2019, Shallow-water Comatulids (Echinodermata: Crinoidea) from Ambon and Lombok Islands, Indonesia, Species Diversity 24, pp. 229-246 : 239-240

publication ID	https://doi.org/ 10.12782/specdiv.24.229
DOI	https://doi.org/10.5281/zenodo.5738293
persistent identifier	https://treatment.plazi.org/id/03B0EE12-FF83-FFA5-FC31-F838FE60FB4C
treatment provided by	Felipe
scientific name	Heterometra amboinae (A. H. Clark, 1912a )
status

Treatment

Heterometra amboinae (A. H. Clark, 1912a) View in CoL

Craspedometra amboinae A. H. Clark, 1912a: 35 View in CoL (list); 1918: 78 (footnote); Reichensperger 1913: 99.

Heterometra amboinae View in CoL —A. H. Clark 1918: 78 (key); 1941: 297, pl. 29 fig. 123, pl. 31 figs 131–136; A. M. Clark and Rowe 1971: 22 (key).

Material examined. 2 specimens. Lombok Is. NSMT E-8249 (2 specimens), Kodek, February15, 1994 .

Description (larger specimen). Centrodorsal discoidal, 7 mm across, 3 mm thick, with cirrus sockets in 1–2 irregular rows and flat aboral pole. Cirri stout, XXIII, 33–35, 25– 30 mm long. Cirrals wholly shorter than wide; beyond about 11 th with prominent aboral spine. Radials wholly concealed by centrodorsal. IBr 2: Ibr 1 oblong, in contact laterally; Ibr 2 (axil) low triangular, free laterally. IIBr 4(3+4). Arms stout, 16, 135 mm long; first syzygy at br 3+4; br 4 –br 10 about 3 times wider than long with parallel articulation, beyond br 10 wedge-shaped. P 3 longest, stiffened, 20 mm long, of 30 segments; proximal pinnulars shorter than wide with a keel toward tip. P 2 similar to P 3, but slightly shorter. P 2 and P 3 much longer and stouter than PII and P 1.

Remarks. Four Heterometra species , namely H. variipinna ( Carpenter, 1882) , H. affinis ( Hartlaub, 1890) , H. amboinae (A. H. Clark, 1912a) , and H. sarae A. H. Clark, 1941 , were recorded from Ambon (A. H. Clark 1941). In these 4 species, H. amboinae is the most closely related to H. sarae in sharing excessively short middle-distal brachials. According to A. H. Clark (1941: 230–232), brachials beyond br 4 are 3–4 times wider than long in H. amboinae , while 6–8 times wider than long in H. sarae . Based on these characteristics, present specimens were identified with H. amboinae .

Distribution. Sri Lanka, Singapore, Indonesia (A. H. Clark 1941; A. M. Clark and Rowe 1971). Depth range: 0–50 m (A. H. Clark 1941).