65 research outputs found
Restudy of Liaoxipterus (Istiodactylidae: Pterosauria), with comments on the Chinese istiodactylid pterosaurs
The cranial anatomy of the long-snouted tyrannosaurid dinosaur Qianzhousaurus sinensis from the Late Cretaceous of China
A Late Cretaceous diversification of Asian oviraptorid dinosaurs: evidence from a new species preserved in an unusual posture
Junchang LĂŒ, Rongjun Chen, Stephen L. Brusatte, Yangxiao Zhu, Caizhi Shen (2016): A Late Cretaceous diversification of Asian oviraptorid dinosaurs: evidence from a new species. Scientific Reports 6 (35780): 1-12, DOI: 10.1038/srep3578
Post-natal parental care in a Cretaceous diapsid from northeastern China
Post-natal parental care seems to have evolved numerous times in vertebrates. Among extant amniotes, it is present in crocodilians, birds, and mammals. However, evidence of this behavior is extremely rare in the fossil record and is only reported for two types of dinosaurs, and a varanopid âpelycosaurâ. Here we report new evidence for post-natal parental care in Philydrosaurus, a choristodere, from the Yixian Formation of western Liaoning Province, China. We review the fossil record of reproduction in choristoderes, and this represents the oldest record of post-natal parental care in diapsids to our knowledge
New yunnanosaurid dinosaur (dinosauria, prosauropoda) from the Middle Jurassic Zhanghe Formation of Yuanmou, Yunnan Province of China /
Preliminary results of a phylogenetic analysis of the pterosaurs from western Liaoning and surrounding areas
New Material of the Pterosaur Gladocephaloideus LĂŒ et al., 2012 from the Early Cretaceous of Liaoning Province, China, with Comments on Its Systematic Position.
Although there are nine genera of ctenochasmatoids reported from the Jehol Biota, at present each is known from a specimen that has either a skull or a relatively complete postcranial skeleton. A nearly complete juvenile specimen of Gladocephaloideus from the Lower Cretaceous Jiufotang Formation of Sihedang, Lingyuan of Liaoning Province is the most complete ctenochasmatoid preserved to date with a skull and postcranial skeleton. Based on the holotype (IG-CAGS 08-07) and the nearly complete new specimen (JPM 2014-004), the diagnosis of Gladocephaloideus is amended: approximately 50 teeth in total with sharp tips; small nasoantorbital opening, occupying approximately 13% of total skull length; ratio of prenarial rostrum length to skull length approximately 0.63; deep groove along the mid-line of the mandibular symphysis; length to width ratio of the longest cervical vertebra = 4.1; ratio of femur length to tibia length = 0.61; tibia as long as the wing-phalange 1. Phylogenetic analysis recovers Gladocephaloideus within the clade Ctenochasmatidae. Gladocephaloideus has a closer relationship to the Chinese Pterofiltrus rather than to other ctenochasmatid pterosaurs. Microstructure of limb bones implies that JPM 2014-004 represents an early juvenile of Gladocephaloideus jingangshanensis, and that the type specimen is not a fully grown specimen either. We assume that the holotype may equate to the late juvenile or sub-adult developmental stage of Gladocephaloideus
New Material of the Pterosaur <i>Gladocephaloideus</i> LĂŒ et al., 2012 from the Early Cretaceous of Liaoning Province, China, with Comments on Its Systematic Position
<div><p>Although there are nine genera of ctenochasmatoids reported from the Jehol Biota, at present each is known from a specimen that has either a skull or a relatively complete postcranial skeleton. A nearly complete juvenile specimen of <i>Gladocephaloideus</i> from the Lower Cretaceous Jiufotang Formation of Sihedang, Lingyuan of Liaoning Province is the most complete ctenochasmatoid preserved to date with a skull and postcranial skeleton. Based on the holotype (IG-CAGS 08â07) and the nearly complete new specimen (JPM 2014â004), the diagnosis of <i>Gladocephaloideus</i> is amended: approximately 50 teeth in total with sharp tips; small nasoantorbital opening, occupying approximately 13% of total skull length; ratio of prenarial rostrum length to skull length approximately 0.63; deep groove along the mid-line of the mandibular symphysis; length to width ratio of the longest cervical vertebra = 4.1; ratio of femur length to tibia length = 0.61; tibia as long as the wing-phalange 1. Phylogenetic analysis recovers <i>Gladocephaloideus</i> within the clade Ctenochasmatidae. <i>Gladocephaloideus</i> has a closer relationship to the Chinese <i>Pterofiltrus</i> rather than to other ctenochasmatid pterosaurs. Microstructure of limb bones implies that JPM 2014â004 represents an early juvenile of <i>Gladocephaloideus jingangshanensis</i>, and that the type specimen is not a fully grown specimen either. We assume that the holotype may equate to the late juvenile or sub-adult developmental stage of <i>Gladocephaloideus</i>.</p></div
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