Himerometra robustipinna (Carpenter)

Sastry, D. R. K., Marimuthu, N. & Rajan, Rajkumar, 2019, Echinodermata of Lakshadweep, Arabian Sea with the description of a new genus and a species, Records of the Zoological Survey of India 119 (4) : -

Himerometra robustipinna (Carpenter)

1881. Actinometra robustipinna Carpenter, P.H. Notes Leyden Mus. 3: 201

1908. Himerometra magnipinna A. H. Clarck, Smithsonian Misc. Colln. 52 (2): 214. WoRMS

1908. Himerometra robustipinna A.H. Clarck, Smithsonian Misc. Colln. 52: 213 [Homonym of Himerometra robustipinna (Carpenter), renamed H. pulcher vide infra]

1912. Himerometra pulcher Clark, A.H. Echinoderma of the Indian Museum, Part VII: 114. World List of Crinoidea. WoRMS

1971. Himerometra magnipinna: Clark, A.M. and Rowe, F.W.E. Monograph of Shallow-water Indo-west Pacific echinoderms, p. 21 (key), p. 8-9 (Distribution).

1971. Himerometra robustipinna: Clark, A.M. and Rowe, F.W.E. Monograph of Shallow-water Indo-west Pacific echinoderms, p. 21 (key), p. 8-9 (Distribution).

2007. Himerometra magnipinna: Sastry, D.R.K. Rec. zool. Surv. India. Occ. Paper No. 271: 12

2007. Himerometra robustipinna: Sastry, D.R.K. Rec. zool. Surv. India. Occ. Paper No. 271: 13

Material: AG-1&1A. Dt. 03.02.2018. One spec. AG-

2. Dt. 03.02.2018. Three specs. AG. Dt. 06.02.2018. Three specs. AGNN18. DT. 20.11.2018. Five specs. AGE-9, 28. Dt. 04.02.2018. Two specs. KA-39 . Dt. 15.02.2018. One spec. KV? One spec.

Description: Upto 60 arms, 120 mm long. Division series beyond I Br with 2 or 4 ossicles, Pinnules on the division series longest, segments not longer than broad, tapering to a flagellate end, with more than 35 segments. Cirri up to 40, cirrus segments up to 30, distal segments with dorsal spine or thickening.Pinnules on division series largest, Br pinnules subequal or gradually diminishing in size from P 1 onwards; largest pinnules with more than 30 wider than long segments, smooth tapering gradually towards a flagellate tip.

Distribution: Lakshadweep and Andamans. Elsewhere: Bay of Bengal to South Pacific Islands. The species is newly recorded here for the first time from Lakshadweep.