A New Fossil Amiidae (Holostei: Halecomorphi) from the Upper Cretaceous Adamantina Formation,Southeastern Brazil,with comments on western Gondwana amiids |
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| Institution: | 1. Institute of Paleobiology, Polish Academy of Sciences, Twarda 51/55, 00-818 Warsaw, Poland;2. Department of Organismal Biology, Department of Physiology and Developmental Biology, Uppsala University, Norbyvägen 18A, 752 36 Uppsala, Sweden;3. Department of Palaeobiology and Evolution, Faculty of Biology, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warsaw, Poland;1. Eötvös Loránd University, Department of Applied and Physical Geology, Pázmány Péter sétány 1/c, Budapest 1117, Hungary;2. Hungarian Academy of Sciences, Eötvös Loránd University, Lendület Dinosaur Research Group, Pázmány Péter sétány 1/c, Budapest 1117, Hungary |
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| Abstract: | Amiid remains from the Upper Cretaceous (Turonian-Santonian) Adamantina Formation, Bauru Basin, Southeastern Brazil are described. The material is known only from fragmented isolated jaw bones (maxilla and dentary), a vertebral centrum, and isolated teeth and represents the first halecomorph described from this stratigraphical unit. Characters of the maxilla and the shape of the teeth, permit referral to the subfamily Vidalaminae. The Adamantina material differs from material described from the slightly younger Marília Formation (Maastrichthian) of the same Bauru Basin, by the presence of longitudinal ridges on the surface of the maxilla as well as by tooth sockets of equal size. These two records are the unique indisputable occurrences of freshwater vidalamins and confirm the presence of this clade within the incipient Neotropical ichthyofauna. |
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| Keywords: | Holostei Amiidae Adamantina Formation Turonian-Santonian Brazil |
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