Himerometra robustipinna

Himerometra robustipinna
Scientific classification
Kingdom:	Animalia
Phylum:	Echinodermata
Class:	Crinoidea
Subclass:	Articulata
Order:	Comatulida
Family:	Himerometridae
Genus:	Himerometra
Species:	H. robustipinna
Binomial name
	Himerometra robustipinna; (Carpenter, 1881)
Synonyms
	Actinometra robustipinna Carpenter, 1881; Antedon crassipinna Hartlaub, 1890; Antedon inopinata Bell, 1894; Antedon kraepelini Hartlaub, 1890; Himerometra kraepelini AH Clark, 1907; Himerometra magnipinna AH Clark, 1908; Himerometra pulcher AH Clark, 1912;

Himerometra robustipinna is a species of crinoid belonging to the family Himerometridaem first described as Actinometra robustipinna by Philip Herbert Carpenter in 1881.^[1]^[2]

Description

Himerometra robustipinna can reach a diameter of about 35 to 40 cm (14 to 16 in). It has a cup-shaped body with 33-62 arms (usually ~45) about 20 cm (8 in) long, extended out from the central disc. Mouth and anus are both on the upper side of the body. Usually this species has reddish or maroon arms, but it may have yellow or pale brown brachials with maroon pinnules. It feeds on detritus, phytoplankton and zooplankton caught by means of a sticky substance on the arms. It can cling onto corals with short appendages called cirri, but it also can freely swim. The larvae of this feather star swim freely with plankton for a few weeks, then they settle down growing into a stalked form. Mature specimen break the stalk becoming free-living.

Distribution

This species is widespread in the western Pacific and in the Indian Ocean, from Bay of Bengal up to China Sea, Great Barrier Reef, Indonesia, Philippines, South Japan.

Habitat

Himerometra robustipinna lives in the coastal waters with a coral reef ecosystem, relatively strong currents, clear water and plankton availability, at a depth of 0 – 57 m.

References

^ "Himerometra robustipinna (Carpenter, 1881)". WoRMS. World Register of Marine Species. Retrieved 22 March 2022.
^ P. Herbert Carpenter (November 1880). "On the Genus Solanocrinus, Goldfuss, and its Relations to recent Comatulae". Journal of the Linnean Society of London, Zoology. 15 (84): 187–217. doi:10.1111/J.1096-3642.1880.TB00356.X. ISSN 0368-2935. Wikidata Q110506013.

David J. Lane and Didier Vandenspiegel. 2003. A Guide to Sea Stars and Other Echinoderms of the World. Singapore Science Centre
Marine Species
EoL

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[1] "Himerometra robustipinna (Carpenter, 1881)". WoRMS. World Register of Marine Species. Retrieved 22 March 2022.

[2] P. Herbert Carpenter (November 1880). "On the Genus Solanocrinus, Goldfuss, and its Relations to recent Comatulae". Journal of the Linnean Society of London, Zoology. 15 (84): 187–217. doi:10.1111/J.1096-3642.1880.TB00356.X. ISSN 0368-2935. Wikidata Q110506013.

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