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13-509: Santa Rosa Formation may refer to: Santa Rosa Formation, New Mexico , Triassic geologic formation of New Mexico Santa Rosa Formation, Colombia , Lower Cretaceous geologic formation of Colombia See also [ edit ] Santa Rosa Group , a geologic group in Belize and Guatemala Topics referred to by the same term [REDACTED] This disambiguation page lists articles associated with

26-624: Is interpreted as a lacustrine deposit in lakes that formed due to local subsidence from dissolution of underlying Permian salt beds. Paleocurrents were primarily to the south in the Tecolotito Member and northeast in the Tres Lagunas Member but are indeterminate in the Los Esteros Member. The Los Esteros Member has yielded fossils of the fern Cynepteria lasiophora , the cycad Zamites powelli ,

39-852: The Anton Chico Formation and is overlain by the Garita Creek Formation . The total thickness of the formation is 32 meters (105 ft). The formation is divided into (in ascending stratigraphic order) the Tecolotito Member , which is primarily sandstone; the Los Esteros Member , which is primarily mudstone; and the Tres Lagunas Member , which is primarily sandstone. The sandstone members are interpreted as alluvial sheets deposited by braided streams . The Los Esteros Member

52-461: The Late Triassic of North America. It was a herbivore up to 2.5 m long. It had a short, unusually heavily built skull, equipped with massive, broad flattened cheek teeth with sharp shearing surfaces for cutting up tough plant material. Teeth are absent from the premaxilla and front of the lower jaw, which in life were probably equipped with a horny beak. The skull is also unusual in that

65-914: The conifer Pelourdea pleoensis , the gymnosperm Dinophyton spinusos , and seeds ( Samaropsis ). This member also includes a microvertebrate site in Santa Fe County, New Mexico that has yielded a diverse fossil assemblage. Fish fossils include lungfish toothplates of Arganodus dorothea , a redfieldiid dermopteric, and scales from Turseodus , including from coprolites . Amphibian fossil fragments are probably from Buttneria perfecta and Apachesaurus gregorii . Reptiles include Trilophosaurus , indeterminate phytosaurs , Desmatosuchus haplocerus , Stagonolepis wellesii , several new aetosaurs , Chatterjeea elegans , Hesperosuchus , and Parrishia mcreai . Synapsids are represented by an indeterminate kannemeyeriiform dicynodont and an unnamed cynodont . In east-central New Mexico,

78-543: The Los Esteros Member has also yielded a Otischalkian dinosauromorph assemblage that includes specimens of Silesauridae and Lagerpetidae , including Dromomeron , the latter of unusually large size. The formation was first named as the Santa Rosa Sandstone by N.H. Darton in July 1919 but the report was not published until 1922. By then the name had already appeared in other publications. A type locality

91-731: The lower temporal opening is missing, giving the appearance of a euryapsid skull. Because of this, the trilophosaurs were once classified with placodonts within Sauropterygia . Carroll (1988) suggested that the lower opening may have been lost to strengthen the skull. Trilophosaurus is traditionally thought to include two valid species: the typical T. buettneri and the more robust T. jacobsi . In 1993, paleontologists Hans-Dieter Sues and Paul E. Olsen reassigned T. jacobsi , as well as two additional trilophosaurids ( Tricuspisaurus and Variodens ), to Procolophonidae based on similarities between its tricuspid teeth and those of

104-433: The newly described procolophonid Xenodiphyodon . This view persisted in subsequent publications until the cranial material of T. jacobsi was described by Heckert et al. (2006). The new material confirmed the originally classification that T. jacobsi , as well as Tricuspisaurus and Variodens based on similarities to it, are indeed trilophosaurids . Meanwhile, a third species of Trilophosaurus , T. dornorum ,

117-625: The title Santa Rosa Formation . If an internal link led you here, you may wish to change the link to point directly to the intended article. Retrieved from " https://en.wikipedia.org/w/index.php?title=Santa_Rosa_Formation&oldid=984567159 " Category : Disambiguation pages Hidden categories: Short description is different from Wikidata All article disambiguation pages All disambiguation pages Santa Rosa Formation, New Mexico The formation consists mostly of white to brown sandstone and mudstone with some interbedded conglomerate . The formation lies on

130-492: The type material of Malerisaurus langstoni and concluded that it's indistinguishable from T. buettneri , and thus M. langstoni represents its synonym. Nesbitt et al. (2015) performed a phylogenetic analysis focusing on relations within Allokotosauria and recovered T. jacobsi to be more closely related to Spinosuchus caseanus than to the type species of Trilophosaurus . To further test this possibility,

143-521: The types of S. caseanus and T. jacobsi were scored separately from the referred the Kahle Trilophosaurus Quarry elements (referred to T. jacobsi by Spielmann et al. (2008) or to S. caseanus by Spielmann et al. (2009)). A phylogenetic analysis recovered the three in a monophyletic clade to the exclusion of T. buettneri based on a single autapomorphy . Furthermore, the types of S. caseanus and T. jacobsi as well as

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156-474: Was named by Mueller & Parker (2006) based on teeth of a robust individual. However, Spielmann et al. (2009) argued that the robustness of the new species is not sufficient to differentiate it from other Trilophosaurus species, especially in light of new robust specimens of T. jacobsi . Therefore, they considered T. dornorum to be a junior synonym of T. jacobsi , a view that was maintained since in other publications. Spielmann et al. (2006) redescribed

169-512: Was not formally designated until 1972. In 1987, Spencer G. Lucas and Adrian Hunt removed the lower sandstone beds into the Anton Chico Formation and divided the remaining beds into members. W.I. Finch and coinvestigators redesignated the unit as the Santa Rosa Formation in 1988. Trilophosaurus Trilophosaurus ( Greek for " lizard with three ridges ") is a lizard-like trilophosaurid allokotosaur known from

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