Abstract
The earliest Permian faunal successions of central Patagonia show compositional changes that probably reflected the environmental warming at the end of the Gondwana glaciations. Bivalves of Asselian to probably Early Tastubian age are described. A new genus,Sueroa, is proposed to reunite a previously known species and a new species,Sueroa andreisi n. sp. Another five new species:Parallelodon? quichaurensis n. sp.,Heteropecten cortignasi n. sp.,Etheripecten saraviae n. sp.,Streblopteria montgomeryi n. sp. andPraeundulomya moreli n. sp. are described. Two previously known species:Malimania patagoniensis (González) andEuchondria sabattiniae González are revised and new occurrences are reported. A further eleven species are described, but they are left in open nomenclature being because they are insufficiently known; these are:Phestia? n. sp.,Modiolus sp.,Palaeoneilo sp.,Stutchburia sp.,Schizodus sp.,Vacunella? sp.,Edmondia sp.,Myonia? n. sp.,Myonia? sp. andPachymyonia? n. sp.
Kurzfassung
Die frühesten permischen Faunenabfolgen von Zentral-Patagonien zeigen Änderungen in ihrer Zusammensetzung, die wahrscheinlich die klimatische Erwärmung der Umwelt am Ende der Vereisung Gondwanas widerspiegeln. Es werden Bivalven des Asseliums bis ?frühen Tastubiums beschrieben. Die neu aufgestellte GattungSueroa soll eine bereits bekannte Art sowie die neue ArtSueroa andreisi n. sp. umfassen. Desweiteren werden die TaxaParallelodon? quichaurensis n. sp.,Heteropecten cortignasi n. sp.,Etheripecten saraviae n. sp.,Streblopteria montgomeryi n. sp. undPraeundulomya moreli n. sp. aufgestellt. Die zwei bereits bekannten ArtenMalimania patagoniensis (González) undEuchondria sabattiniae González werden revidiert und neue Vorkommen ergänzt. Weitere elf Arten werden wegen ihrer unvollständigen Erhaltung unter offener Nomenklatur beschrieben (Palaeoneilo sp.,Phestia? n. sp.,Modiolus sp.,Palaeoneilo sp.,Stutchburia sp.,Schizodus sp.,Vacunella? sp.,Edmondia sp.,Myonia? n. sp.,Myonia? sp. undPachymyonia? n. sp.).
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González, C.R. Lower Permian bivalves from central Patagonia, Argentina. Paläontol Z 80, 130–155 (2006). https://doi.org/10.1007/BF02988973
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DOI: https://doi.org/10.1007/BF02988973