Biology:Bokkeveldia
Bokkeveldia is a genus of mitrate stylophoran known from fossil material found in Gydo Shale, Bokkeveld Group, South Africa, dating to the Emsian stage. The genus contains a single species, Bokkeveldia oosthuizeni.[1][2]
Description
This species is known from a complete external mold, slightly disrupted posteriorly, of the convex surface. This surface is characterized by 22 plate elements arranged through five transverse rows, with row I, III and IV bearing each five plates, row II bearing four plates and row V bearing three.
In a phylogenetic analysis by Ruta in 1999, the arrangement of these plates is used as a reference to establish the homology and consistent numeclature of the plates of the convex surface in anomalocystitids, which display high variation in the number, shape, size and relative position of these.[3]
Classification
In the analysis by Ruta in 1999, focused on anomalocystitids, and the supertrees for stylophoran echinoderms by Ruta in 2003 and Lefebvre in 2005, Bokkeveldia is recovered inside a well-defined clade of "austral" anomalocystitids, containing taxa such as Mongolocarpos, Placocystites, Rhenoystis, and Victoriacystis.[3][4][5]
References
- ↑ Ruta, M.; Theron, J. N. (1997). "Two Devonian mitrates from South Africa". Palaeontology 40 (1): 201–243. https://biostor.org/reference/166243.
- ↑ Domínguez Alonso, Patricio; Jefferies, Richard P. S.; Gil Cid, María Dolores (December 2002). "An annotated check-list of genera and species of carpoids". Coloquios de Palcontologia 53: 33-68. ISSN 1132-1660. https://hdl.handle.net/20.500.14352/56880.
- ↑ 3.0 3.1 Ruta, Marcello (November 1999). "A cladistic analysis of the anomalocystitid mitrates" (in en). Zoological Journal of the Linnean Society 127 (3): 345–421. doi:10.1111/j.1096-3642.1999.tb00681.x. https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.1999.tb00681.x.
- ↑ Ruta, M. (2003). "A species-level supertree for stylophoran echinoderms". Acta Palaeontologica Polonica 48 (4): 559-568. https://www.app.pan.pl/article/item/app48-559.html.
- ↑ Lefebvre, B. (2005). "Stylophoran supertrees revisited". Acta Palaeontologica Polonica 50 (3): 477-486. https://www.app.pan.pl/article/item/app48-559.html.
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