L773:1214 1119 OR L773:1802 8225
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Bobellis oliveri gen. et sp. nov. from the Silurian of North Greenland (Laurentia) and the systematic position of pycnomphaline gastropods
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- Peel, John Stuart (author)
- Uppsala universitet,Paleobiologi
- (creator_code:org_t)
- CZECH GEOLOGICAL SURVEY, 2019
- 2019
- English.
- In: Bulletin of Geosciences. - : CZECH GEOLOGICAL SURVEY. - 1214-1119 .- 1802-8225. ; 94:2, s. 125-136
- Journal article (peer-reviewed)
Abstract
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- The gastropod Bobellis oliveri gen. et sp. nov. is described from carbonate mounds of the Samuelsen Hoj Formation (early Silurian) within the Washington Land Group of North Greenland (Laurentia). It displays a profound adapertural swing of the growth lines across the upper whorl surface in the multi-whorled trochiform shell; the umbilicus is closed by a prominent funicle. Bobellis oliveri is assigned to the Family Pycnomphalidae (Ordovician-Devonian; nom. transl. Subfamily Pycnomphalinae Peel, 1984) which is transferred to the Euomphaloidea, alongside the morphologically similar Omphalotrochidae (Devonian-Permian). In pycnomphalids the umbilicus is usually partially or completely closed by a prominent circumbilical funicle while the umbilicus of omphalotrochids is generally open.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geologi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geology (hsv//eng)
Keyword
- Silurian
- North Greenland
- Laurentia
- Gastropoda
- Pycnomphalidae
Publication and Content Type
- ref (subject category)
- art (subject category)
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