Nectocarididae
| Nectocarididae Temporal range: | |
|---|---|
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| Nectocaris pteryx, specimen ROM 60079 | |
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| Life restoration of Nectocaris | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chaetognatha |
| Family: | †Nectocarididae Conway Morris, 1976 |
| Genera[1] | |
| |
Nectocarididae is a controversial family of animals that superficially resemble squids. Represented by Nectocaris (=Vetustovermis, Petalilium?) and Nektognathus from the Cambrian period (as well as possibly Nectocotis from the Ordovician).[2][3] Some researchers claim they are cephalopods, however, this is heavily disputed and most reject this claim.[4][5] A 2025 paper describing the new genus Nektognathus found paired jaw elements in both it and Nectocaris which revealed them to be related to chaetognaths (arrow worms), in particular the superficially similar Timorebestia, due to the jaw elements being homologous to those of other chateognathiferans, as well as the possession of nerve structure called the "ventral ganglion" characteristic of chaetognaths.[2]
List of genera
[edit]- Nectocaris
- Nectocotis? Not diagnostic for the family[2]
- Vetustovermis? Synonym of Nectocaris
- Petalilium? Synonym of Nectocaris
- Nektognathus
References
[edit]- ↑ "Nectocarididae". Paleobiology Database. Retrieved 7 December 2023.
- 1 2 3 Vinther, Jakob; Parry, Luke A.; Lee, Mirinae; Nielsen, Morten Lunde; Oh, Yeongju; Park, Changkun; Kihm, Ji-Hoon; DeVivo, Giacinto; Harper, David A. T.; Nielsen, Arne T.; Park, Tae-Yoon S. (25 July 2025). "A fossilized ventral ganglion reveals a chaetognath affinity for Cambrian nectocaridids". Science Advances. 11 (30). doi:10.1126/sciadv.adu6990. PMC 12285702.
- ↑ Smith, Martin R. (2019). "An Ordovician nectocaridid hints at an endocochleate origin of Cephalopoda" (PDF). Journal of Paleontology. 94: 64–69. doi:10.1017/jpa.2019.57. S2CID 201208912.
- ↑ Pohle, Alexander; Kröger, Björn; Warnock, Rachel C. M.; King, Andy H.; Evans, David H.; Aubrechtová, Martina; Cichowolski, Marcela; Fang, Xiang; Klug, Christian (December 2022). "Early cephalopod evolution clarified through Bayesian phylogenetic inference". BMC Biology. 20 (1): 88. doi:10.1186/s12915-022-01284-5. ISSN 1741-7007. PMC 9008929. PMID 35421982.
- ↑ Kröger, Björn; Vinther, Jakob; Fuchs, Dirk (August 2011). "Cephalopod origin and evolution: A congruent picture emerging from fossils, development and molecules". BioEssays. 33 (8): 602–613. doi:10.1002/bies.201100001. PMID 21681989. S2CID 2767810.
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