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[dinosaur] Enantiornithins coracoid from Uzbekistan + Middle Jurassic turtles from Russia + Permian vertebrates from Vyazniki






Ben Creisler
bcreisler@gmail.com


Some recent non-dino papers in the Russian Paleontological Journal (English translation version):


A. V. Panteleev (2018)
Morphology of the Coracoid of Late Cretaceous Enantiornithines (Aves: Enantiornithes) from Dzharakuduk (Uzbekistan).
Paleontological Journal 52(2): 201â207
https://link.springer.com/article/10.1134/S0031030118020089
DOI: https://doi.org/10.1134/S0031030118020089


Based on serial material from the Turonian of Dzharakuduk (central Kyzyl Kum, Uzbekistan), the morphology of coracoid of enantiornithines is described in detail. Variants of each morphological element are considered; this allows determination of the taxonomic position of enantiornithines even using small coracoid fragments.


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I. G. Danilov, E. M. Obraztsova, E. A. Boitsova &P. P. Skutschas (2018)
Diversity of Middle Jurassic Turtles from the Berezovsk Quarry Locality, Krasnoyarsk Region, Russia: Morphology and Histological Study.
Paleontological Journal 52(2): 188â200Â
DOI: https://doi.org/10.1134/S0031030118010070
https://link.springer.com/article/10.1134/S0031030118010070



Morphology and histology of several fragmentary turtle specimens from the Middle Jurassic locality in the Berezovsk quarry (Krasnoyarsk Region, Russia) are described, including Testudines indet. 1 (costal VIII), Testudines indet. 2 (two ornamented shell fragments), and Testudines indet. 3 (distal part of a humerus), and also skeletal elements of Annemys sp. (Xinjiangchelyidae) represented by mass material in the same locality. It is shown that Testudines indet. 1 and 3 probably belong to one or two taxa of basal aquatic turtles, while Testudines indet. 2 is most likely an abnormal Annemys sp. The presumable presence of basal turtles in the Berezovsk Quarry Assemblage agrees with the fact that they are present in other Middle Jurassic turtle assemblages of Asia.

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50-year-old research now published...


B. P. Vjuschkov (2018)
Locality of Permian Terrestrial Vertebrates in the Vicinity of the Town of Vyazniki
Paleontological Journal 52(2): 168â174Â
DOI: https://doi.org/10.1134/S0031030118020144
https://link.springer.com/article/10.1134/S0031030118020144


The manuscript was written in the mid-1950s, providing the results of survey of an unusual tetrapod burial in the Upper Permian beds of the town of Vyazniki (Vladimir Region). The bone-bearing sand strata form here the top of the Permian beds, which are underlain by clays with conchostracans tentatively dated Early Tatarian. Abundant tetrapod remains obtained in the course of excavations are dominated by isolated bones; these are associated with scales and cranial bones of palaeoniscids, fin spines of hybodontid sharks and coprolites. The tetrapod assemblage includes the kotlassiomorph Bystrowiana permira Vjuschkov, the stegocephalian Dvinosaurus sp. (new species prevailing in number in the assemblage), the dicynodont Dicynodon sp., gorgonopians, therocephalians, and presumably cynodonts, along with procolophonoids (or other small reptiles, such as eosuchians or protorosaurians). The presence of one more stegocephalian is also probable. It is assumed that the Vyazniki assemblage represents an early developmental stage of the Severodvinian pareiasaurian fauna corresponding to the uppermost Lower Tatarian.


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M. A. Shishkin, A. G. Sennikov & V. K. Golubev (2018)
Comments on the Paper of B.P. Vjuschkov "Locality of Permian Terrestrial Vertebrates in the Vicinities of the Town of Vyazniki".
Paleontological Journal 52(2): 175â187
DOI: https://doi.org/10.1134/S0031030118020120
Âhttps://link.springer.com/article/10.1134/S0031030118020120


The paper of B.P. Vjuschkov considering Late Permian vertebrates from the Vyazniki locality, prepared more than half a century ago and remained unpublished until the present time, was the first preliminary generalization of the geological and paleontological data on this burial. The material of this study collected by Vjuschkov during excavations in 1955â1957 revealed a unique composition of the local tetrapod assemblage compared to previously known contemporaneous analogues. Further studies of the Vyazniki fauna performed during the last decades provided a better understanding of its composition and age, showing that it is of paramount importance as a record of the terminal episode in the history of the Paleozoic precrisis biota.