Biogeography of Ordovician and Silurian gastropods, monoplacophorans and mimospirids
2013 (English)In: Memoir Geological Society of London, Vol. 38, 199-220 p.Article in journal (Refereed) Published
The biogeographical distribution of Ordovician and Silurian gastropods, monoplacophorans and mimospirids has beenanalysed on a generic level. The dataset contains 334 genera and 2769 species, yielding 1231 records of genera with 2274 occurrencesworldwide. There is a bias towards eastern Laurentia, Baltica and Perunica records. Some 53.1% of the records are Ordovician. The study demonstrates that these molluscs are well suited to being used to improve understanding of Ordovician and Silurian biogeographicalprovinciality. Specific points are that: a Lower Ordovician assemblage is evident in Laurentia; the fauna of the Argentinean Precordillera is Laurentian until the Darriwilian, when taxa are shared with North China; Late Silurian gastropods from the Alexander terrane (SE Alaska) are unknown in Laurentia, but support a rift origin of this terrane from NE Siberia; Perunica, Ibero-Armorica and Morocco cluster together throughout the Ordovician but Perunica and Morocco are closer; Darriwilian–Sandbian deep-water Bohemian taxaoccur in Baltica; a Laurentian–Baltica proximity is unsupported until the Silurian; Siberia clusters with North China and eastern Laurentia during the Tremadocian–Darriwilian; during the Gorstian–Pridoli Siberia clusters with the Farewell and Alexander terranes; North China may have been close to Laurentia and the Argentinean margin of Gondwana; and the affinity of Tarim taxa is problematic.
Place, publisher, year, edition, pages
London: The Geological Society of London , 2013. Vol. 38, 199-220 p.
Gastropoda, Monoplacophorans, Tergmyans, Paragastropoda, biogeography Ordovician, Silurian
Research subject Historical Geology and Paleontology
IdentifiersURN: urn:nbn:se:uu:diva-213230DOI: 10.1144/M38.15ISI: 000343729900015ISBN: 978-186239-373-8OAI: oai:DiVA.org:uu-213230DiVA: diva2:681365
Meeting of IGCP 503 on Ordovician Palaeogeography and Palaeoclimate, Copenhagen, DENMARK SEP, 2009