Holopus Orbigny 1837

Holopus is a genus of echinoderms belonging to the family Holopodidae.

The species of this genus are found in Central America, Pacific Ocean (near Australia).

Species:

Holopus alidis Bourseau, Améziane-Cominardi, Avocat & Roux, 1991 Holopus mikihe Donovan & Pawson, 2008 Holopus rangii Orbigny, 1837

Holopodidae with cup tubular, more or less irregular, commonly with radial ridges or rows of tubercles. Upper edge more or less 5-sided. Radial articular facet rather large, sloping slightly outward; interarticular ligament fossae large. Radials and arms different in size, more or less distinctly arranged as group of 3 larger arms and group of 2 smaller arms. Arms 10, stout, coiled inward, forming fistlike cover over adoral surface; each branch with as many as 25 to 30 brachials forming spiral and meeting laterally as cover over adoral side of cup when retracted. Proximal 3 to 10 secundibrachials large, succeeded by distinctly smaller brachials. Some brachials may be irregular, commonly smaller, and triangular to fit within cover.