Acrothyra is an extinct genus of gregarious brachiopod that lived during the Middle Cambrian. Fossils of this genera can be found in Canada in formations such as the Burgess Shale and the Forteau Formation.[1]
| Acrothyra Temporal range: Miaolingian – ~ | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Brachiopoda |
| Genus: | †Acrothyra Matthew, 1901 |
| Type species | |
| Acrotreta proavia Matthew, 1899 | |
There are currently 253 specimens of Acrothyra that are known from the Greater Phyllopod bed, where they comprise 0.5% of the community.[1]
Taxonomy
editSpecies
editThis genus currently contains five described species. They are listed below:[2]
- Acrothyra bonnia Skovsted, Knight, Balthasar & Boyce, 2017[3]
- Acrothyra gregaria Walcott, 1901
- Acrothyra minor Walcott, 1905 [4]
- Acrotreta proavia (Matthew, 1899) (Type species)
- Acrothyra sera Mathew, 1902 [5]
Description
editMembers of this genus have short apsacline ventral pseudointerarea with a triangular intertrough. The interior of the ventral valve is elongated with its apical process reaching about one-third of its valve length. It also has a triangular depression without apical pits.[3]
References
edit- 1 2 Caron, Jean-Bernard; Jackson, Donald A. (October 2006). "Taphonomy of the Greater Phyllopod Bed community, Burgess Shale". PALAIOS. 21 (5): 451–65. Bibcode:2006Palai..21..451C. doi:10.2110/palo.2003.P05-070R. JSTOR 20173022. S2CID 53646959.
- ↑ https://www.gbif.org/species/search?rank=SPECIES&highertaxon_key=4864454&status=ACCEPTED&status=DOUBTFUL
- 1 2 Skovsted, Christian & Knight, I & Balthasar, Uwe & Boyce, DW. (2017). Depth related brachiopod faunas from the lower Cambrian Forteau Formation of southern Labrador and western Newfoundland, Canada. Palaeontologia Electronica. 54A. 10.26879/775.
- ↑ "Inarticulate Brachiopods of the Lower and Middle Cambrian Pioche Shale of the Pioche District, Nevada". https. Retrieved 2026-05-13.
- ↑ Landing, Ed & Johnson, Susan & Geyer, Gerd. (2008). Faunas and Cambrian Volcanism on the Avalonian Marginal Platform, Southern New Brunswick. Journal of Paleontology. 82. 884-905. 10.1666/07-007.1.
Notes
edit- BABCOCK, L. E., R. A. ROBISON, M. N. REES, S. PENG, AND M. R. SALTZMAN. 2007. The global boundary stratotype section and point (GSSP) of the Drumian Stage (Cambrian) in the Drum Mountains, Utah, USA. :, 30(002):85-95.
- MATTHEW, G. F. 1901. Acrothyra. A new genus of Etcheminian brachiopods. Nat. Hist. Soc. New Brunswick, Bull, 4:303-304.
- ROWELL, A. H. 1966. Revision of some Cambrian and Ordovician inarticulate brachiopods.
- YOCHELSON, E. L. 1961. The operculum and mode of life of Hyolithes. Journal of Paleontology:152-161.
External links
edit- "Acrothyra gregaria" Archived 2017-08-10 at the Wayback Machine. Burgess Shale Fossil Gallery. Virtual Museum of Canada. 2011. (Burgess Shale species 17)
_silhouette.svg){kind=small} | This protostome-related article is a stub. You can help Wikipedia by adding missing information. |
 | This article related to a Cambrian animal is a stub. You can help Wikipedia by adding missing information. |