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Heteronemertea

From Wikipedia, the free encyclopedia

Heteronemertea
An example of Heteronemertea, the Parborlasia corrugatus
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Nemertea
Class: Pilidiophora
Order: Heteronemertea
Bürger, 1892
Families

See text.

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.

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.

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Transcription

Taxonomy

Families within the order Heteronemertea include:[2]

References

  1. ^ Barnes, Robert D. (1982). Invertebrate Zoology. Philadelphia, PA: Holt-Saunders International. p. 261. ISBN 0-03-056747-5.
  2. ^ "WoRMS - World Register of Marine Species - Heteronemertea".


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This page was last edited on 25 October 2023, at 03:47
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