Encyclopedia of Life · EOL (see source)
Errantia
Sign in to saveErrantia is a diverse group of marine polychaete worms in the phylum Annelida. Traditionally a subclass of the paraphyletic class Polychaeta, it is currently regarded as a monophyletic group within the larger Pleistoannelida, composed of Errantia and Sedentaria. These worms are found worldwide in marine environments and brackish water.
Species
Subclass
- PhylumAnnelida
- ClassPolychaeta
足刺亞綱（學名：Errantia，舊稱Aciculata），亦作游走亚纲，是环节动物门多毛綱的一個亞綱。 本分類的成員遍布世界各地的海洋及鹹淡水交界。 这一类动物的每一体节有一对疣足，能自由游泳，其头部明显，感官较发达；咽能外翻，有颚。常见的动物有：沙蚕(Nereis)、裂虫(Syllis)。
via
Museum specimens
- Specimen records
- 87
- With media
- 4
- Collections
- CAS
- Recorded in
- United States, Mexico, Seychelles, Comoro Islands [Comoros], Indonesia, Brazil, Pakistan, Philippines
~2 min read
Encyclopedic overview
4 sectionsContents
- Phylogeny
- Classification
- Historical
- References
Errantia is a diverse group of marine polychaete worms in the phylum Annelida. Traditionally a subclass of the paraphyletic class Polychaeta, it is currently regarded as a monophyletic group within the larger Pleistoannelida, composed of Errantia and Sedentaria. These worms are found worldwide in marine environments and brackish water.
==Phylogeny== The phylogeny of polychaetes is slowly being resolved. Errantia and Sedentaria are the two biggest clades of polychaetes, and together they compose clade Pleistoannelida. Two groups are nested within Errantia: Aciculata (Eunicida + Phyllodocida) and Protodriliformia (small meiofaunal worms such as the Protodrilida).
Excerpted from Wikipedia’s “Errantia” article, available under the CC BY-SA 4.0 licence.