Rhabdopleurida

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

see text

Rhabdopleurida is one of three orders in the class Pterobranchia, which are small, worm-shaped animals. Members belong to the hemichordates.[1][2] Species in this order are sessile, colonial, connected with a stolon, living in clear water and secrete tubes called tubarium. They have a single gonad, the gill slits are absent and the collar has two tentaculated arms. [3] Rhabdopleura is the best studied pterobranch in developmental biology.[4] Some claim Rhabdopleura is an extant graptolite.[5][6]

Taxonomy

This small order is monotypic. It has only a single genus, containing four to 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 normani Allmann, 1869
      • Rhabdopleura striata Schepotieff, 1909

References

  1. ↑ Animaldiversity.ummz.umich.edu
  2. ↑ Eol.org
  3. ↑ Modern Text Book of Zoology: Invertebrates
  4. ↑ Sato, A; Bishop JDD; Holland PWH (2008). "Developmental biology of pterobranch hemichordates: history and perspectives". Genesis. 46 (11): 587–91. doi:10.1002/dvg.20395. PMID 18798243.
  5. ↑ Sato, A; Rickards, RB; Holland PWH (2008). "The origins of graptolites and other pterobranchs: a journey from 'Polyzoa'". Lethaia. 41: 303–316. doi:10.1111/j.1502-3931.2008.00123.x.
  6. ↑ Mitchell, Charles E.; Michael J. Melchin; Chris B. Cameron; Jörg Maletz (2012). "Phylogenetic analysis reveals that Rhabdopleura is an extant graptolite". Lethaia. doi:10.1111/j.1502-3931.2012.00319.x. ISSN 0024-1164.
  • Marinespecies.org
  • ITIS.gov
  • Hayward, P.J.; Ryland, J.S. (Ed.) (1990). The marine fauna of the British Isles and North-West Europe: 1. Introduction and protozoans to arthropods. Clarendon Press: Oxford, UK. ISBN 0-19-857356-1. 627 pp.


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