Ocnus (echinoderm)

Ocnus is a genus of sea cucumbers in the family Cucumariidae.

Species
The following species are recognised in the genus Ocnus:
 * Ocnus amiculus Cherbonnier, 1988
 * Ocnus braziliensis (Verrill, 1868)
 * Ocnus brunneus (Forbes in Thompson, 1840)
 * Ocnus capensis (Théel, 1886)
 * Ocnus cataphractus (Sluiter, 1901)
 * Ocnus corbulus (Cherbonnier, 1953)
 * Ocnus cruciformis Thandar in Thandar & Mjobo, 2014
 * Ocnus cylindricus Semper, 1867
 * Ocnus diomedeae Pawson, 1976
 * Ocnus glacialis (Ljungman, 1879)
 * Ocnus lacteus (Forbes & Goodsir, 1839)
 * Ocnus paracorbulus Thandar, Zettler & Arumugam, 2010
 * Ocnus petiti (Cherbonnier, 1958)
 * Ocnus placominutus Thandar, Zettler & Arumugam, 2010
 * Ocnus planci (Brandt, 1835)
 * Ocnus pygmaeus Semper, 1867
 * Ocnus rowei Thandar, 2008
 * Ocnus tantulus Cherbonnier, 1988
 * Ocnus vicarius Bell, 1883