Thaumactena
| Thaumactena Temporal range:
Cambrian Stage 3, ~ | |
|---|---|
| Thaumactena ensis | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Ctenophora |
| Class: | †Scleroctenophora |
| Genus: | †Thaumactena Ou et al., 2015[1] |
| Species: | †T. ensis
|
| Binomial name | |
| †Thaumactena ensis Ou et al., 2015[1]
| |
Thaumactena is an extinct monotypic genus of scleroctenophoran (a type of stem-group ctenophore[2][3][4]) that lived during Cambrian Stage 3, around 520 Ma.[1] The type and only species is Thaumactena ensis.[1]
Description
Two specimens are known, the holotype (ELEL-SJ081427A, an adult), and the paratype (ELEL-SJ081563, a juvenile), both having a length-width ratio of 10:1.[1] The oral region expands outward, forming an "oral skirt."[1] Thaumactena is distinguished from other scleroctenophorans by the possession of a streamlined body, similar to chaetognaths (arrow worms), suggesting that, in life, it was an agile swimmer.[1]
Phylogeny
Thaumactena is placed in the Scleroctenophora, as it and other members of the class possess an internal skeleton.[1]
See also
References
- ^ a b c d e f g h i 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). American Association for the Advancement of Science. doi:10.1126/sciadv.1500092. PMC 4646772.
- ^ Zhao, Yang; Vinther, Jakob; Parry, Luke A.; Wei, Fan; Green, Emily; Pisani, Davide; Hou, Xianguang; Edgecombe, Gregory D.; Cong, Peiyun (2019). "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. Retrieved 2024-12-18.
- ^ Parry, Luke A.; Lerosey-Aubril, Rudy; Weaver, James C.; Ortega-Hernández, Javier (2021). "Cambrian comb jellies from Utah illuminate the early evolution of nervous and sensory systems in ctenophores". iScience. 24 (9) 102943. doi:10.1016/j.isci.2021.102943. PMC 8426560. PMID 34522849. Retrieved 2024-12-18.
- ^ Klug, Christian; Kerr, Johanne; Lee, Michael S. Y.; Cloutier, Richard (2021-09-24). "A late-surviving stem-ctenophore from the Late Devonian of Miguasha (Canada)" (PDF). Scientific Reports. 11 (1). doi:10.1038/s41598-021-98362-5. ISSN 2045-2322. PMC 8463547. PMID 34561497. Retrieved 2024-12-18.