Bokkeveldia

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Bokkeveldia
Temporal range: Early Devonian (Emsian) [1]
Scientific classification OOjs UI icon edit-ltr.svg
Kingdom: Animalia
Phylum: Echinodermata
Class:† Stylophora
Order:† Mitrata
Suborder:† Anomalocystitida
Genus:† Bokkeveldia
Ruta & Theron, 1997
Species:
†B. oosthuizeni
Binomial name
†Bokkeveldia oosthuizeni
Ruta & Theron, 1997

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]

Contents

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

  1. 1 2 Ruta, M.; Theron, J. N. (1997). "Two Devonian mitrates from South Africa". Palaeontology. 40 (1): 201–243.
  2. ↑ 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.
  3. 1 2 Ruta, Marcello (November 1999). "A cladistic analysis of the anomalocystitid mitrates". Zoological Journal of the Linnean Society. 127 (3): 345–421. doi:10.1111/j.1096-3642.1999.tb00681.x.
  4. ↑ Ruta, M. (2003). "A species-level supertree for stylophoran echinoderms". Acta Palaeontologica Polonica. 48 (4): 559–568.
  5. ↑ Lefebvre, B. (2005). "Stylophoran supertrees revisited". Acta Palaeontologica Polonica. 50 (3): 477–486.
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