Rhabdopleuridae

Rhabdopleura
Rhabdopleura normani
Scientific classification
Kingdom:	Animalia
Phylum:	Hemichordata
Class:	Pterobranchia
Order:	Rhabdopleurida
Family:	Rhabdopleuridae
Genus:	Rhabdopleura Allman, 1869
Species
see text

see text

Rhabdopleurida is one of three orders in the class Pterobranchia, which are small, worm-shaped animals. Members belong to the hemichordates. Species in this order are sessile, colonial, living in clear water and secrete tubes called coenecium. Rhabdopleura is the best studied pterobranchs in developmental biology. Some claim Rhabdopleura is an extant graptolite.

This small order is monotypic. It has only a single genus, containing four to six species.

Order Rhabdopleurida

...
Wikipedia