New papers in the current issue of the Journal of Vertebrate Paleontology. The official year for Journal of Vertebrate Paleontology 39(6) is given as 2019, but all the papers were first published online in 2020.
The new euharamiyidan taxon Cryoharamiya increases the taxonomic and morphological diversity of Euharamiyida. By similarity in crown proportions to the M1 of Vilevolodon, Cryoharamiya likely belongs to Arboroharamiyidae ... The Teete locality in Yakutia is the northernmost occurrence of Euharamiyida (62ÂN latitude). The exact paleolatitude for the Teete locality cannot be estimated because of its uncertain geological age. However, in any case, it was not much different from the Recent latitude... The Early Cretaceous Cryoharamiya is the youngest representative of Euharamiyida in the fossil record. The geological age of the Batylykh Formation is not well constrained and estimated as BerriasianâBarremian (Averianov et al., 2018). The next youngest records are from the Upper Jurassic (Oxfordian) Tiaojischan Formation (Yanliao Biota) and Qigu Formation in northern China. The oldest record of Euharamiyida is from the Middle Jurassic Itat Formation in West Siberia, Russia. Discovery of euharamiyidans in the Lower Cretaceous of Siberia supports the idea that this region served as a refugium for many vertebrate taxa during JurassicâCretaceous transition (Averianov et al., 2018).Â
Chiniquodon omaruruensis sp. nov.
Helke B. Mocke, Leandro C. Gaetano & Fernando Abdala (2020)
A new species of the carnivorous cynodont Chiniquodon (Cynodontia, Chiniquodontidae) from the Namibian Triassic.
Journal of Vertebrate Paleontology 39(6): Article: e1754231
[2019]
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https://doi.org/10.1080/02724634.2019.1754231https://www.tandfonline.com/doi/full/10.1080/02724634.2019.1754231Chiniquodontidae is a family of Triassic carnivorous cynodonts well represented in the Middle-Upper Triassic of Argentina and Brazil and, more recently, discovered in Madagascar and central Namibia. The Namibian specimen was found in the uppermost levels of the upper Omingonde Formation and is represented by the skull and partial skeleton. In this contribution, we provide a diagnosis for Chiniquodon omaruruensis, sp. nov., describe the postcranial material, and compare it with that of South American Chiniquodon specimens. Chiniquodon omaruruensis provides the first evidence of elements from the pes in Chiniquodon, and one of the few for non-mammaliaform cynodonts. Chiniquodon omaruruensis has a remarkably large calcaneus with an incipiently differentiated tuber, metatarsal II lateromedially robust but remarkably shorter than metatarsal IV, and an almost quadrangular basal phalanx in digit III. Similar to other Chiniquodon species, it lacks costal plates on ribs and shows a tall and slender scapular blade, a large acromion process positioned well above the scapular neck, and the absence of disc-like phalanges in the autopodium.