"Dimorphodon" weintraubi

Species of pterosaur September 2020 September 2020 "Dimorphodon" weintraubi Early Jurassic, 189 185Jurassic 189 185 Dimorphodon_weintraubi_IGM_3494.png Fossil specimen Dimorphodon weintraubi Clark et al., 1998 "Dimorphodon" weintraubi is an extinct species of pterosaur originally thought to be a species of the primitive pterosaur genus Dimorphodon from the Lower Jurassic La Boca Formation of Mexico. It was named by James Clark and others in 1998, in honour of Dr. Robert L. Weintraub.Clark J. M. Hopson J. A. Hernández R. R. Fastovsky D. E. Montellano M. 1998-02-26 Foot posture in a primitive pterosaur https://www.nature.com/articles/36092 Nature en 391 6670 886–889 10.1038/36092 1998Natur.391..886C 0028-0836 Phylogenetic analyses have found "Dimorphodon" weintraubi as the earliest-diverging anurognathid, extending the origin of this clade to the Early Jurassic.Dalla Vecchia Fabio Marco 2019 Seazzadactylus venieri gen. et sp. nov., a new pterosaur (Diapsida: Pterosauria) from the Upper Triassic (Norian) of northeastern Italy PeerJ 7 e7363 10.7717/peerj.7363 free 2167-8359 6661147 31380153Wei Xuefang Pêgas Rodrigo Vargas Shen Caizhi Guo Yanfang Ma Waisum Sun Deyu Zhou Xuanyu 2021 Sinomacrops bondei, a new anurognathid pterosaur from the Jurassic of China and comments on the group PeerJ 9 e11161 10.7717/peerj.11161 free 2167-8359 8019321 33850665 Description The holotype specimen, IGM 3494, is an uncrushed partial skeleton, comprising the posterior part of the skull, four cervical vertebrae, scapulocoracoids from both sides, the left humerus, the right leg, and most of the right arm of the animal. According to the authors of its description, the specimen came from an animal bigger than the largest Dimorphodon specimens. Locomotion The completeness of the right foot, as well as the fact that the specimen was uncrushed, helped Clark and others to deduce that the animal was a plantigrade, instead of the bird-like digitigrade feet, because for the animal to walk in a digitigrade position, it would have to separate the joints in its feet. This helped to "revive" the idea that pterosaurs were quadrupedal when on the ground, at least in primitive pterosaurs. Clark et al. also found that the foot of the animal was capable of grasping, and they suggested that basal pterosaurs would have been scansorial, and maybe arboreal as well. Classification "Dimorphodon" weintraubi was originally described as a species of Dimorphodon, until the 2019 description of Seazzadactylus by Vecchia that placed the animal as the most basal anurognathid. The 2021 description of Sinomacrops by Wei and others also supported this idea, discussing it more in depth and emphasizing the need for a redescription of the fossil material. Below is a simplified cladogram made from a phylogenetic analysis performed by Wei et al. "Dimorphodon" weintraubi Batrachognathinae Sinomacrops bondei Batrachognathus volans Anurognathinae Dendrorhynchoides curvidentatus Luopterus mutoudengensis Jeholopterus ningchengensis Anurognathus ammoni Vesperopterylus lamadongensis font-size:100%;line-height:100% Anurognathidae References Q136762839 Q135701554 Category:Fossil taxa described in 1998 Category:Articles with quotation marks in the title Category:Anurognathidae Category:Early Jurassic pterosaurs