Scalidophora
| Scalidophora | |
|---|---|
| |
Ottoia prolifica from the Walcott Quarry of the Burgess Shale (Middle Cambrian) near Field, British Columbia, Canada.
| |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Subkingdom: | Eumetazoa |
| Clade: | ParaHoxozoa |
| Clade: | Bilateria |
| Clade: | Nephrozoa |
| (unranked): | Protostomia |
| Superphylum: | Ecdysozoa |
| Clade: | Scalidophora Lemburg, 1995 |
| Phyla | |
| |
| Synonyms | |
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Cephalorhyncha, Priapozoa | |
Scalidophora is a group of marine
Nematoda and Nematomorpha; thus, they are placed in the group Ecdysozoa
.
The two species in the genus Markuelia, known from fossilized embryos from the middle Cambrian, are thought to be stem Scalidophorans.
The group has also been considered a single group, Cephalorhyncha,[6] with three classes.
The group is named after the spines (scalids) covering the introvert (head that can be retracted into the trunk).[7]
References
- S2CID 16872271.
- ^ PMID 18192181.
- ^ PMID 26605063.
- ^ Heiner, I., Kristensen, R.H. 2005. Two new species of the genus Pliciloricus (Loricifera, Pliciloricidae) from the Faroe Bank, North Atlantic. Zoologischer Anzeiger. 243: 121–138.
- ^ Multicellular Animals: Volume III: Order in Nature - System Made by Man, Volum 3
- ^ Dirnberger, J. "Explanations and Difficulties in Invertebrate Phylogeny". Invertebrate Zoology. Kennesaw State University. Retrieved 2012-08-11.
- S2CID 4397099.
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