Just out | A New Fossil Amiidae (Holostei: Halecomorphi) from the Upper Cretaceous Adamantina Formation, Southeastern Brazil, with comments on western Gondwana amiids @ Cretaceous Research


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A New Fossil Amiidae (Holostei: Halecomorphi) from the Upper Cretaceous Adamantina Formation, Southeastern Brazil, with comments on western Gondwana amiids


Author(s)

Paulo M. Brito, William R. Nava, Agustin G. Martinelli


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.


Keywords: Holostei; Amiidae; Adamantina Formation; Turonian-Santonian; Brazil


DOI: 10.1016/j.cretres.2017.04.018


READ IT HERE: http://www.sciencedirect.com/science/article/pii/S0195667117300083


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