Heteronemertea

Heteronemertea is a monophyletic order of about 500 species of nemertean worm. It contains genera such as Lineus and Cerebratulus, and includes the largest and most muscular nemerteans.

Heteronemertea
An example of Heteronemertea, the Parborlasia corrugatus
Scientific classification
Kingdom: Animalia
Phylum: Nemertea
Class: Anopla
Order: Heteronemertea
Bürger, 1892
Families

See text.

Almost all heteronemerteans have three primary body-wall muscle strata: an outer longitudinal, a middle circular, and an inner longitudinal. The lateral nerve cords are outside the circular muscle, as in palaeonemerteans, but separated from the epidermis by the usually well-developed outer longitudinal muscle.[1]

Illustration of Gorgonorhynchus repens, a species within the family Gorgonorhynchidae, discharging its proboscis in response to a perceived threat.

Taxonomy

Families within the order Heteronemertea include:[2]

  • Baseodiscidae
  • Cerebratulidae
  • Gorgonorhynchidae
  • Lineidae
  • Mixolineidae
  • Panorhynchidae
  • Poliopsiidae
  • Polybrachiorhynchidae
  • Pussylineidae
  • Riseriellidae
  • Valenciniidae
gollark: ++remind 12h BAHfest
gollark: ++remind 13h continue tab queues
gollark: ++remind 8h relocate tabs
gollark: ++remind 10h improve URL shortener
gollark: ++remind 22h https://m.youtube.com/watch?v=EHx1gYTA-Rw

References

  1. Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 261. ISBN 0-03-056747-5.
  2. http://www.marinespecies.org/aphia.php?p=taxdetails&id=122305


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.