Published November 10, 2016 | Version v1
Taxonomic treatment Open

Orbiculoidea d'Orbigny 1847

  • 1. Jackson School of Geosciences, University of Texas, Austin, TX 78712, USA; & Earth Sciences, Plymouth University, Plymouth, PL 4 8 AA, UK; & Department of Earth Sciences, Natural History Museum, London, SW 7 5 BD, UK;
  • 2. Earth Sciences, Plymouth University, Plymouth, PL 4 8 AA, UK; & Department of Geology, University of Georgia, Athens, GA 30602, USA
  • 3. Department of Earth Sciences, Natural History Museum, London, SW 7 5 BD, UK;

Description

Genus Orbiculoidea d’Orbigny, 1847

Type species. Orbicula forbesii Davidson, 1848; Silurian, Wenlock; West Midlands, England.

Diagnosis. The generic diagnosis follows Mergl (2006). Shell thin, strongly dorsibiconvex, subcircular, with subtrapezoidal outline of the posterior part. Ornament on both valves composed of regular raised concentric fila separated by broader interspaces. Dorsal valve is conical to subconical with subcentral apex; ventral valve with subcentral apex. Ventral valve depressed conical with subcentral apex. Pedicle track narrow, tapering posteriorly and anteriorly closed by shallow listrium; foramen in posterior end of listrium with short internal tube.

Notes

Published as part of Foster, William J., Danise, Silvia & Twitchett, Richard J., 2017, A silicified Early Triassic marine assemblage from Svalbard, pp. 851-877 in Journal of Systematic Palaeontology 15 (10) on page 854, DOI: 10.1080/14772019.2016.1245680, http://zenodo.org/record/10883052

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Linked records

Additional details

Biodiversity

Family
Discinidae
Genus
Orbiculoidea
Kingdom
Animalia
Order
Lingulida
Phylum
Brachiopoda
Scientific name authorship
d'Orbigny
Taxon rank
genus
Type status
holotype
Taxonomic concept label
Orbiculoidea d'Orbigny, 1847 sec. Foster, Danise & Twitchett, 2017

References

  • Catullo, T. A. 1846. Memoria geognostico-paleozoica sulle Alpi Venete. Memorie della Societ'a Italiana delle scienze residente in Modena, 24, 1 - 158.
  • Bittner, A. 1899. Versteinerungen aus den Trias-Ablagerungen des Sud-Ussuri-Gebietes in der ostsibirischen Kustenprovinz. Memoires´du Comite´Geologique´, 7, 1 - 35.
  • Davidson, T. 1848. M´emoire sur les brachiopods du Syst`eme silurien sup´erieur de l'Angleterre. Bulletin de la Societe ´´ geologique´de France, serie´2, 5, 309 - 338, 370 - 374.
  • Mergl, M. 2006. A review of Silurian discinoid brachiopods from historical British localities. Bulletin of Geosciences, 81, 215 - 236.