1) Echinoderm genus 2) Genus holothuria 3) Type of holothuroidea 
Holothuria is a genus of marine animals of the family Holothuriidae. Members of the genus are found in coastal waters in tropical and temperate regions. They are soft bodied, limbless invertebrates that dwell on the ocean floor. They resemble a cucumber in form. The genus contains some species that are harvested for food and sold as sea cucumber. ...
Class of the Phylum Echinodermata. Sea cucumbers are holothurians.
Holothuria is the typical type of an order of Echinoderms, the Holothurioidea or sea-cucumbers. This order is destitute of the calcareous plates typical of the class, but has a leathery integument open at both ends, and pierced by orifices through which suctorial feet or ambulacra protrude. They have the mouth surrounded by tentacula; a long convol...
[n] - type genus of the Holothuridae
genus Holothuria noun type genus of the Holothuridae