Dinos 2023: Dinosaurs Wall Calendar

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Dhiman et al. (2023) report the discovery of 92 titanosaur egg clutches from the Upper Cretaceous Lameta Formation ( Madhya Pradesh, India), including three types of clutches and assigned to six oospecies, interpret their findings as suggestive of higher diversity of titanosaur taxa from the Lameta Formation than indicated by body fossils, and evaluate the implications of the studied egg clutches for the knowledge of the reproductive biology of titanosaurs. [171] Buffetaut (2023) reports the discovery of a plaster cast of the lost femur of Struthio anderssoni from the late Pleistocene deposits of the Upper Cave at Zhoukoudian (China), and transfers the species S. anderssoni to the genus Pachystruthio. [258] Dinosaur eggshell fragments with preserved eggshell membranes are reported from the Late Jurassic Brushy Basin Member of the Morrison Formation ( Utah, United States) by Lazer et al. (2023). [74]

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Redescription of Cumnoria prestwichii is published by Maidment et al. (2023), who recover Cumnoria as a non- ankylopollexian iguanodontian, and consider it to be distinct from Camptosaurus. [191] A study on palatal grooves of thalattosuchians is published by Young et al. (2023), who report that the studied grooves were continuous with ossified canals that connected the oral cavity to the nasal cavity, and interpret the studied grooves and canals as likely evidence of the existence of a heat exchange pathway linking the palatal vascular plexus to the vessels that supplied blood to the brain and eyes. [21] Wilberg, E. W.; Godoy, P. L.; Griffiths, E. F.; Turner, A. H.; Benson, R. B. J. (2023). "A new early diverging thalattosuchian (Crocodylomorpha) from the Early Jurassic (Pliensbachian) of Dorset, U.K. and implications for the origin and evolution of the group". Journal of Vertebrate Paleontology. 42 (3). e2161909. doi: 10.1080/02724634.2022.2161909. S2CID 256149424.Evidence from eggshells of Troodon, interpreted as indicative of endothermic physiology but also of reptile-like eggshell mineralization process, is presented by Tagliavento et al. (2023). [148] Changes in body size of birds from the Yucatán peninsula since the Late Pleistocene are documented by Silva‐Martínez et al. (2023). [261] a b Sennikov, A. G. (2022). "A New Pseudosuchian from the Early Triassic of Eastern Europe". Paleontological Journal. 56 (11): 1391–1418. doi: 10.1134/S0031030122110168. S2CID 256618821. Prieto-Márquez, A.; Sellés, A. (2023). "Evolutionary convergence in a small cursorial styracosternan ornithopod dinosaur from western Europe". Journal of Vertebrate Paleontology. 42 (5). e2210632. doi: 10.1080/02724634.2023.2210632. S2CID 259335419.

2023 Dinosaur Calendar - Etsy UK 2023 Dinosaur Calendar - Etsy UK

Barker et al. (2023) reconstruct the endocasts of the baryonychine spinosaurids Baryonyx walkeri and Ceratosuchops inferodios, finding their morphology to be similar to non-maniraptoriform theropods despite their highly modified skulls. [109] Agnolin, Federico L.; Gonzalez Riga, Bernardo J.; Aranciaga Rolando, Alexis M.; Rozadilla, Sebastián; Motta, Matías J.; Chimento, Nicolás R.; Novas, Fernando E. (2023-02-02). "A new gigant titanosaur (Dinosauria, Sauropoda) from the Upper Cretaceous of Northwestern Patagonia, Argentina". Cretaceous Research. 146: 105487. Bibcode: 2023CrRes.14605487A. doi: 10.1016/j.cretres.2023.105487. ISSN 0195-6671. S2CID 256559829. The study suggesting that carnosaurs like Allosaurus were primarily scavengers that fed on sauropod carcasses, originally published by Pahl and Ruedas (2021) [117] is criticized by Kane et al. (2023) [118] but later defended by Pahl and Ruehdas (2023). [119]A study on the stable oxygen and carbon isotope compositions of dinosaur eggshell calcites and tooth apatites from the Upper Cretaceous Kakanaut Formation ( Chukotka Autonomous Okrug, Russia) is published by Amiot et al. (2023), who interpret their findings as indicating that near-polar Kakanaut dinosaurs likely laid eggs in early spring, giving time for the hatchlings to grow before winter. [84] Han, F.; Yu, Y.; Zhang, S.; Zeng, R.; Wang, X.; Cai, H.; Wu, T.; Wen, Y.; Cai, S.; Li, C.; Wu, R.; Zhao, W.; Xu, X. (2023). "Exceptional early Jurassic fossils with leathery eggs shed light on dinosaur reproductive biology". National Science Review. doi: 10.1093/nsr/nwad258. The first baryonychine teeth from South America reported to date are described from the Lower Cretaceous Feliz Deserto Formation (Brazil) by Lacerda et al. (2023). [110]