Rhabdopleurida
Encyclopedia
Rhabdopleurida is one of two orders in the class Pterobranchia, which are small, worm-shaped animals. Members belong to the hemichordates
. Species in this order are sessile
, living in clear water and secrete
tubes on the ocean floor.
. It has only a single genus
, containing six species.
Order Rhabdopleurida
Hemichordata
Hemichordata is a phylum of marine deuterostome animals, generally considered the sister group of the echinoderms. They date back to the Lower or Middle Cambrian and include two main classes: Enteropneusta , and Pterobranchia. A third class, Planctosphaeroidea, is known only from the larva of a...
. Species in this order are sessile
Sessility (zoology)
In zoology, sessility is a characteristic of animals which are not able to move about. They are usually permanently attached to a solid substrate of some kind, such as a part of a plant or dead tree trunk, a rock, or the hull of a ship in the case of barnacles. Corals lay down their own...
, living in clear water and secrete
Secretion
Secretion is the process of elaborating, releasing, and oozing chemicals, or a secreted chemical substance from a cell or gland. In contrast to excretion, the substance may have a certain function, rather than being a waste product...
tubes on the ocean floor.
Taxonomy
This small order is monotypicMonotypic
In biology, a monotypic taxon is a taxonomic group with only one biological type. The term's usage differs slightly between botany and zoology. The term monotypic has a separate use in conservation biology, monotypic habitat, regarding species habitat conversion eliminating biodiversity and...
. It has only a single genus
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
, containing six species.
Order Rhabdopleurida
- Family Rhabdopleuridae
- Genus Rhabdopleura
- Rhabdopleura annulata Norman, 1921
- Rhabdopleura compacta Hincks, 1880
- Rhabdopleura grimaldi Julien (nomen dubium)
- Rhabdopleura manubialis Julien 1903 (nomen dubium)
- Rhabdopleura normaniRhabdopleura normaniRhabdopleura normani is a small, marine species of worm-shaped animal. It is a sessile suspension feeder, lives in clear water, and secretes tubes on the ocean floor.-Description:This species grows in colonies...
Allmann, 1869 - Rhabdopleura striata Schepotieff, 1909
- Genus Rhabdopleura