Heteronemertea
Order of ribbon worms
From Wikipedia, the free encyclopedia
Heteronemertea is a monophyletic order of about 500 species of nemertean worms. 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: | Pilidiophora |
| Order: | Heteronemertea Bürger, 1892 |
| Families | |
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]
Taxonomy
Families within the order Heteronemertea include:[2]
