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The oldest members of porcellioidea (gastropoda): A new link between baltica and perunica
Czech Univ Life Sci, Fac Environm Sci, Kamycka 129, Prague 16521 6, Czech Republic;Czech Geol Survey, Klarov 3-131, Prague 11821 1, Czech Republic.
Uppsala Univ, Museum Evolut, Norbyvagen 16, SE-75236 Uppsala, Sweden.ORCID iD: 0000-0001-8769-3572
Czech Univ Life Sci, Fac Environm Sci, Kamycka 129, Prague 16521 6, Czech Republic.
2019 (English)In: PAPERS IN PALAEONTOLOGY, ISSN 2056-2799, Vol. 5, no 2, p. 281-297Article in journal (Refereed) Published
Abstract [en]

The strata of Gotland, Sweden, provide one of the richest records of Silurian gastropod faunas in the world. Recent re-evaluation of museum collections revealed for the first time the presence of gastropods of the superfamily Porcellioidea (Archaeogastropoda) in the Silurian strata of Gotland (Baltica). Additionally, the porcellioideans from Gotland represent the oldest record of the superfamily, members of which were an element of marine gastropod communities from Silurian to Cretaceous time, a period of more than 350 million years. The morphology of the sinistrally coiled teleoconchs in the oldest porcellioidean gastropods supports an existing hypothesis that the pseudo-bilaterally symmetrical teleoconch and the mid-whorl position of the selenizone in the post-Silurian porcelliids is a derived shell character. The occurrence of porcellioidean gastropods in the Silurian strata of Baltica also represents a new faunal link between Baltica and Perunica which corresponds well with published palaeobiogeographical and palaeogeographical models. Six taxa are described, including the Sheinwoodian (early Wenlock) Gotlandiela contraria (Lindstrom), the Gorstian (early Ludlow) Mannegaardina hedei gen. et sp. nov., the Ludfordian (late Ludlow) Gotlandiela sp. and Pernericirrus lindstroemi sp. nov., as well as two agnesiid species.

Place, publisher, year, edition, pages
2019. Vol. 5, no 2, p. 281-297
Keywords [en]
Gastropoda, Porcellioidea, early phylogeny, faunal affinity, Silurian, Baltica
National Category
Other Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-387298DOI: 10.1002/spp2.1241ISI: 000467885500004OAI: oai:DiVA.org:uu-387298DiVA, id: diva2:1328951
Available from: 2019-06-24 Created: 2019-06-24 Last updated: 2019-06-24Bibliographically approved

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Ebbestad, Jan Ove R.

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