The tergomyan Mollusc Carcassonnella from the Upper Ordovician of Girvan, Scotland
2008 (English)In: Palaeontology, ISSN 0031-0239, E-ISSN 1475-4983, Vol. 51, no Part 3, 663-675 p.Article in journal (Refereed) Published
The tergomyan genus Carcassonnella Horny´ and Peel, 1996 is common in and characteristic of the Mediterranean Province in peri-Gondwanan terranes during the late Tremadoc and Arenig. It is united with other small, slitbearingcyrtonellids in the Carcassonnellidae Horny´ , 1997b, of which Baltiscanella Horny´ , 1997b from the Arenig of the Oslo Region, Norway, and Sarkanella from the Caradoc of the Siljan District, Sweden has been recognized outside the Mediterranean Province. The most inclusive view of the Carcassonnellidae unites Peelerophon Yochelson, 1982, Carcassonnella Horny´ and Peel, 1996, Sarkanella Horny´ , 1997a, Baltiscanella Horny´ , 1997b, and Tachillanella Horny´ , 1997b. Patterns of distribution of genera in the family are obscured, however, by widely different phylogenetic relationships presented in the literature. Here, Carcassonnella multilineata (Reed, 1920) is documented in the upper Whitehouse and Drummuck subgroups of the Girvan district, Midland Valley of Scotland, being the first record of the genus outside peri-Gondwana. Its enigmatic occurrence on the edge of Laurentia is opposed to the occurrence of low latitude benthic faunas in higher latitudes during this time interval (the Boda Event). It is likely, therefore, that the genus spread from the ancient stock found on the Perunican microcontinent as this drifted away from Gondwana in the mid-Caradoc.
Place, publisher, year, edition, pages
2008. Vol. 51, no Part 3, 663-675 p.
Mollusca, Tergomya, Carcassonnellidae, palaeobiogeography
IdentifiersURN: urn:nbn:se:uu:diva-87669DOI: 10.1111/j.1475-4983.2008.00774.xISI: 000255925900011OAI: oai:DiVA.org:uu-87669DiVA: diva2:133003