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
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Linked records
Additional details
Identifiers
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.