Velumbrella
| Velumbrella Temporal range: | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Clade: | †Cambroernida |
| Class: | †Eldonioidea |
| Family: | †Rotadiscidae (?) |
| Genus: | †Velumbrella Stasińska 1960 |
| Type species | |
| V. czarnockii Stasińska 1960 | |
Velumbrella is an eldonioid[1] known from the Early to Middle Cambrian of Poland.[2] The fossils depict a scleritosed disk with a U-shaped gut.[3]
Velumbrella was originally thought to be related to the hydrozoan order Trachylenida,[4] or possibly to Ediacaria or Beltanella which were considered to be Cambrian jellyfish.[5] Upon erecting the class Eldonioidea, Dzik assigned Vellumbrella to Eldoniidae rather than Rotadiscidae on account of its radial ribs.[6]
Several authors (including Dzik) later noted the similarity between Velumbrella cznarnockii and Pararotadiscus guizhouensis (which was initially described as Rotadiscus guizhouensis).[7][8] A more recent review tenatively placed Velumbrella in the Rotadiscidae (along with the more confidently-assigned Pararotadiscus),[1] noting that the rotadiscids are distinguished from other eldonioid families by concentric ornamentations on the dorsal surface.[9]
References
[edit]- 1 2 Schroeder, Paterson & Brock 2018, pp. 80–81
- ↑ Masiak & Żylińska 1994, pp. 330, 336
- ↑ Masiak & Żylińska 1994, p. 336
- ↑ Stasińska 1960, p. 342
- ↑ Stasińska 1960, p. 343
- ↑ Dzik 1991, p. 51
- ↑ Dzik, Zhao & Zhu 1997, pp. 387–389
- ↑ Zhu, Zhao & Chen 2002, p. 179
- ↑ Schroeder, Paterson & Brock 2018, p. 84
Works cited
[edit]- Dzik, Jerzy (1991). "Is fossil evidence consistent with traditional views of the early metazoan phylogeny?" (PDF). In Simonetta, AM; Conway Morris, S (eds.). The early evolution of Metazoa and the significance of problematic taxa. Oxford: Clarendon Press. pp. 47–56. Archived from the original (PDF) on 2024-12-20. Retrieved 2024-12-29.
- Dzik, Jerzy; Zhao, Yuanlong; Zhu, Maoyan (1997). "Mode of life of the Middle Cambrian eldonioid lophophorate Rotadiscus" (PDF). Palaeontology. 40 (2): 385–396.
- Masiak, M.; Żylińska, A. (1994). "Burgess Shale-type fossils in Cambrian sandstones of the Holy Cross Mountains" (PDF). Acta Palaeontologica Polonica. 39 (4): 329–340. Retrieved 28 December 2024.
- Schroeder, Natalie I.; Paterson, John R.; Brock, Glenn A. (2018). "Eldonioids with associated trace fossils from the lower Cambrian Emu Bay Shale Konservat-Lagerstätte of South Australia". Journal of Paleontology. 92 (1): 80–86. Bibcode:2018JPal...92...80S. doi:10.1017/jpa.2018.6. ISSN 0022-3360. S2CID 197586878.
- Stasińska, A. (1960). "Velumbrella czarnockii n. gen., n. sp. - Meduse du Cambrien Inferieur des Monts de Sainte-Croix" (PDF). Acta Palaeontologica Polonica. 5 (3): 337–346. Retrieved 29 December 2024.
- Zhu, Mao-Yan; Zhao, Yuan-Long; Chen, Jun-Yuan (2002-03-01). "Revision of the Cambrian discoidal animals Stellostomites eumorphus and Pararotadiscus guizhouensis from South China". Geobios. 35 (2): 165–185. Bibcode:2002Geobi..35..165Z. doi:10.1016/S0016-6995(02)00025-6. ISSN 0016-6995.
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