Pterobranchia

Pterobranchia

Taxobox
name = Pterobranchia
regnum = Animalia
phylum = Hemichordata
classis = Pterobranchia

Pterobranchia is a clade of small, worm-shaped animals. They belong to the hemichordata, and live in secreted tubes on the ocean floor. Pterobranchia feed by filtering plankton out of the water with the help of cilia attached to tentacles. There are about 30 known living species in the group.

The class Pterobranchia was established by Ray Lankester in 1877. It contained, at that time, the single genus "Rhabdopleura". "Rhabdopleura" was at first regarded as an aberrant Polyzoon, but with the publication of the Challenger Report ("Cephalodiscus") in 1887, it became clear that "Cephalodiscus", the second genus now included in the order, had affinities in the direction of the Enteropneusta.

Study under an electron microscope have suggested that pterobranchs belong to the same clade as the extinct graptolites.cite book |author=Fortey, Richard A. |title=Life: a natural history of the first four billion years of life on earth |publisher=Alfred A. Knopf |location=New York |year=1998 |pages= 129 |isbn=0-375-40119-9 |oclc= |doi= |accessdate=]

Footnotes

References

*
* [https://www.webdepot.umontreal.ca/Usagers/cameroc/MonDepotPublic/Cameron/Species.html Cameron, C. B. "Classification of the extant hemichordata"]
* [http://faculty.washington.edu/bjswalla/Hemichordata/Pterobranchia/class%20pterobranchia.html At Billie Swalla's site]


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  • Pterobranchia — Pter o*bran chi*a, n. pl. [NL., fr. Gr. ? a wing + ? ?.] (Zo[ o]l.) An order of marine Bryozoa, having a bilobed lophophore and an axial cord. The genus {Rhabdopleura} is the type. Called also {{Podostomata}}. See {Rhabdopleura}. [1913 Webster] …   The Collaborative International Dictionary of English

  • Pterobranchia — Pterobranchia, Flügelkiemer, Klasse der ⇒ Hemichordata, die nur ca. 20 marine, einzeln oder in Kolonien lebende Arten umfasst. Wenige mm groß; am Mesosoma zwei bis sechs Paar Arme mit bewimperten, die Nahrung einstrudelnden Tentakeln; Metasoma… …   Deutsch wörterbuch der biologie

  • Pterobranchia —   Pterobranchia Un Rhabdopleura n …   Wikipedia Español

  • Pterobranchia — Flügelkiemer Rhabdopleura normani Systematik Unterreich: Vielzellige Tiere (Metazoa) Abtei …   Deutsch Wikipedia

  • Pterobranchia — Bryozoa Bry o*zo a, n. pl. [NL., fr. Gr. ? moss + ? animal.] (Zo[ o]l.) A class of Molluscoidea, including minute animals which by budding form compound colonies; called also {Polyzoa}. [1913 Webster] Note: They are often coralike in form and… …   The Collaborative International Dictionary of English

  • Pterobranchia — Ptérobranches Pharyngotrèmes …   Wikipédia en Français

  • Pterobranchia — …   Википедия

  • Pterobranchia — Pterobrạnchia   [griechisch], die Flügelkiemer (Kragentiere) …   Universal-Lexikon

  • pterobranchia — ptero·bran·chia …   English syllables

  • pterobranchia — ˌterəˈbraŋkēə noun plural Usage: capitalized Etymology: New Latin, from pter + branchia : an order of Hemichordata or an independent phylum of uncertain affinities that comprises two genera (Cephalodiscus and Rhabdopleura) of small deep sea tube… …   Useful english dictionary

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