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Metriorhynchoids
Metriorhynchoidea is an extinct superfamily (biology), superfamily of thalattosuchian crocodyliforms from the Early Jurassic to the Early Cretaceous (Toarcian - Valanginian, possibly as late as early Aptian) of Europe, North America and South America. Metriorhynchids are fully aquatic crocodyliforms. Named by Leopold Fitzinger, Fitzinger, in 1843, it contains the basal taxa like ''Teleidosaurus'', ''Zoneait'' and ''Eoneustes'' and the family Metriorhynchidae. An unnamed taxon is known from Chile. Phylogeny Metriorhynchoidea is a stem-based taxon defined in the ''PhyloCode'' by Mark T. Young and colleagues in 2024 as "the largest clade within Thalattosuchia containing ''Metriorhynchus brevirostris'', but not ''Teleosaurus cadomensis'' and ''Macrospondylus bollensis''". The more derived clade Euthalattosuchia was named by Young and colleagues in 2024 to contain those thalattosuchians with both cranial and postcranial adaptations to a fully marine lifestye. It is defined in the ''P ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Zoneait Nargorum
''Zoneait'' (pronounced "zone-eight" and meaning "large tooth" in the Kiowa language) is an extinct genus of thalattosuchian crocodylomorph known from a single species, ''Zoneait nargorum'', from the Middle Jurassic Snowshoe Formation of Oregon. Discovery and naming The holotype was collected by Lupher and Packard.Éric Buffetaut, Buffetaut. (1979). Jour.Paleontology. 53,pt.1: 210, tf.2f,g. ''Z. nargorum'' was named in 2015 by paleontologist Eric Wilberg on the basis of several partial skulls, vertebrae, and forelimb bones that were found in an outcrop of the Weberg Member of the Snowshoe Formation near the town of Izee, Oregon, Izee. It is a member of Metriorhynchoidea, a clade of marine-adapted thalattosuchians that existed until the Early Cretaceous. Description and classification The skeleton of ''Zoneait'' possesses several adaptations for offshore marine life but retains features characteristic of its land-living ancestors, indicating that it is a transitional form betw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
