Galeactena
| Galeactena Temporal range: | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Ctenophora |
| Class: | †Scleroctenophora |
| Genus: | †Galeactena Ou et al., 2015 |
| Species: | †G. hemispherica |
| Binomial name | |
| †Galeactena hemispherica Ou et al., 2015 | |
Galeactena is an extinct genus of scleroctenophoran comb jellies (members of the phylum Ctenophora) that lived during the early Cambrian period as a member of the Chengjiang biota. This genus only contains one species, Galeactena hemispherica, making it monotypic.[2][3][4]
It was a planktonic genus, drifting through the ocean and filter feeding.[5]
Description
[edit]The anatomy of Galeactena is globose, bearing resemblance to an upside-down garlic bulb. All specimens of Galeactena have a consistent vaulted hemispherical shape with little evidence of its body being twisted or distorted. It has eight rows of cilia which it uses to propel through the water.[2][6] The body of Galeactena and its apical organ is supported by a external organic skeleton.[7]
Taxonomy
[edit]This genus is a member of the taxonomic class Scleroctenophora, making it related to genera such as Batofasciculus. However it was most closely related to genera such as Maotianoascus.[2][3]
References
[edit]- ↑ Ou, Qiang; Xiao, Shuhai; Han, Jian; Sun, Ge; Zhang, Fang; Zhang, Zhifei; Shu, Degan (3 July 2015). "A vanished history of skeletonization in Cambrian comb jellies". Science Advances. 1 (6) e1500092. American Association for the Advancement of Science. Bibcode:2015SciA....1E0092O. doi:10.1126/sciadv.1500092. eISSN 2375-2548. PMC 4646772. PMID 26601209. S2CID 390519.
- 1 2 3 "Science". AAAS. doi:10.1126/sciadv.1500092. PMC 4646772. PMID 26601209. Retrieved 2026-07-14.
- 1 2 "WoRMS - World Register of Marine Species - Out of scope". marinespecies.org. Retrieved 2026-07-14.
- ↑ "Galeactena". www.gbif.org. Retrieved 2026-07-14.
- ↑ "600-million-year-old fossils that reveal the world's first animals – Museum Crush". 2019-05-28. Retrieved 2026-07-14.
- ↑ "Galeactena hemispherica — Chris Otley". chrisotley.com. Retrieved 2026-07-14.
- ↑ Zhao, Yang; Vinther, Jakob; Parry, Luke A.; Wei, Fan; Green, Emily; Pisani, Davide; Hou, Xianguang; Edgecombe, Gregory D.; Cong, Peiyun (2019-04-01). "Cambrian Sessile, Suspension Feeding Stem-Group Ctenophores and Evolution of the Comb Jelly Body Plan". Current Biology. 29 (7): 1112–1125.e2. doi:10.1016/j.cub.2019.02.036. hdl:1983/40a6bcb8-a740-482c-a23c-7d563faea5c5. ISSN 0960-9822. PMID 30905603.
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