Haramiyidan mammals from the Middle Jurassic of Western Siberia, Russia. Part 1: Shenshouidae and <i>Maiopatagium</i>

Averianov, Alexander O.; Martin, Thomas; Лопатин, А. В.; Schultz, Julia A.; Schellhorn, Rico; Krasnolutskii, Sergei; Skutschas, Pavel P.; Ivantsov, S. V.

doi:10.1080/02724634.2019.1669159

Cited by 11 publications

(4 citation statements)

References 25 publications

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“…The Late Mesozoic vertebrate assemblages of Western Siberia show a remarkable evolutionary stasis. The oldest assemblage is known from the Middle Jurassic (Bathonian) Itat Formation at Berezovsk Quarry in Krasnoyarsk krai (reviewed in [64]). This diverse assemblage includes, among other groups, stem karaurid salamanders, crown salamander Kiyatriton , basal choristoderes, tritylodontid synapsid Stereognathus , stegosaurs, docodontans and euharamyidans.…”

Section: Resultsmentioning

confidence: 99%

The last ceratosaur of Asia: a new noasaurid from the Early Cretaceous Great Siberian Refugium

Averianov,

Skutschas,

Atuchin

et al. 2024

Proc. R. Soc. B.

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The noasaurid ceratosaur Kiyacursor longipes gen. et sp. nov. is described based on a fragmentary skeleton including cervical vertebra, pectoral girdle, humerus and hind limbs from the Lower Cretaceous (Aptian) Ilek Formation at Shestakovo 1 locality in Western Siberia, Russia. This is the first ceratosaur from the Early Cretaceous of Asia, extending the stratigraphic range of Ceratosauria by 40 Myr on that continent. Kiyacursor shares unique hind limb proportions with Elaphrosaurus and Limusaurus , suggesting improved cursorial ability. These taxa show an ostrich-like specialization of the pes, with a large third metatarsal and greatly reduced second metatarsal. By contrast, all other fast running non-avian theropod dinosaurs have an arctometatarsalian pes, with the third metatarsal strongly reduced proximally. The new taxon lived in the Early Cretaceous ecosystem containing a number of other Jurassic relics, such as stem salamanders, protosuchian and shartegosuchid crocodyliforms, tritylodontid synapsids and docodontan mammaliaforms.

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Section: Resultsmentioning

confidence: 99%

The last ceratosaur of Asia: a new noasaurid from the Early Cretaceous Great Siberian Refugium

Averianov,

Skutschas,

Atuchin

et al. 2024

Proc. R. Soc. B.

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“…The described mammaliaforms from this locality include the euharamiyidans ‘ Sineleutherus ’ issedonicus , Sharypovoia arimasporum , S. magna , and Maiopatagium sibiricum (Averianov et al . 2011, 2019), the docodontans Itatodon tatarinovi , Simpsonodon sibiricus , and Hutegotherium yaomingi (Averianov et al . 2005, 2010; Lopatin & Averianov 2005; Averianov & Lopatin 2006), an indeterminate eutriconodontan (Averianov et al .…”

Section: Methodsmentioning

confidence: 99%

Multituberculate mammals from the Middle Jurassic of Western Siberia, Russia, and the origin of Multituberculata

Averianov

Martin

Лопатин

et al. 2020

Papers in Palaeontology

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Tashtykia primaeva gen. et sp. nov. and Tagaria antiqua gen. et sp. nov. (Multituberculata incertae sedis) are described based on isolated teeth from the Middle Jurassic (Bathonian) Itat Formation from the Berezovsk coal mine in Krasnoyarsk Territory, Western Siberia, Russia. Tashtykia primaeva gen. et sp. nov. is characterized by a P5 with three rows of cusps (cusp formula 2B:4M:6L) and a high sectorial p4 with two triangular lobes, five serrations associated with labial and lingual ridges, and a unique distal cusp. Tagaria antiqua gen. et sp. nov. differs from all other multituberculates by a very long P5 with flat crown and many cusps arranged in three rows (4B:6M:7L). Morphologically the teeth of Kermackodon and Megaconus are transitional between Euharamiyida and Middle Jurassic Multituberculata. Kermackodon shares several characteristics with Euharamiyida, such as pointed cusps on the molars connected by longitudinal ridges, a distolabial cusp on the M2 that is higher than the other cusps, and a single large sectorial premolar (p4) with a distal basin. The euharamiyidan characters of Megaconus are an ultimate upper premolar with a shorter lingual side, a p4 with a distal basin, and one cusp on the molars being larger than the other cusps. In addition, Megaconus shares an ultimate upper premolar with three rows of cusps, horizontal wear on the molars, and pyramidal cusps on the molars separated by transverse grooves with multituberculates. The multituberculate characters of Kermackodon include horizontal rather than basined wear on the surface of the molars and serrations on the p4.

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“…Among other Middle Jurassic records, Changetisaurus estesi (Bathonian, Kyrgyzstan [31]) is a partial skeleton attributed to Squamata, but it requires re-study. Squamate remains are also recorded from the Bathonian Berezovsk Mine, western Siberia (a possible paramacellodid, two 'scincomorphs': [32]) and from similar aged deposits in Morocco ('scincomorphs', 'Parviraptor-like' taxon [33]). An osteoderm-covered lizard was briefly described from Callovian-Oxfordian age deposits at Shishougou (Junggar Valley, China [34]), but a detailed description and analysis has yet to be published.…”

Section: The Early Squamate Fossil Recordmentioning

confidence: 99%

The Origin and Early Evolutionary History of Snakes

2022

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Snakes comprise nearly 4,000 extant species found on all major continents except Antarctica. Morphologically and ecologically diverse, they include burrowing, arboreal, and marine forms, feeding on prey ranging from insects to large mammals. Snakes are strikingly different from their closest lizard relatives, and their origins and early diversification have long challenged and enthused evolutionary biologists. The origin and early evolution of snakes is a broad, interdisciplinary topic for which experts in palaeontology, ecology, physiology, embryology, phylogenetics, and molecular biology have made important contributions. The last 25 years has seen a surge of interest, resulting partly from new fossil material, but also from new techniques in molecular and systematic biology. This volume summarises and discusses the state of our knowledge, approaches, data, and ongoing debates. It provides reviews, syntheses, new data and perspectives on a wide range of topics relevant to students and researchers in evolutionary biology, neontology, and palaeontology.

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Haramiyidan mammals from the Middle Jurassic of Western Siberia, Russia. Part 1: Shenshouidae and Maiopatagium

Cited by 11 publications

References 25 publications

The last ceratosaur of Asia: a new noasaurid from the Early Cretaceous Great Siberian Refugium

The last ceratosaur of Asia: a new noasaurid from the Early Cretaceous Great Siberian Refugium

Multituberculate mammals from the Middle Jurassic of Western Siberia, Russia, and the origin of Multituberculata

The Origin and Early Evolutionary History of Snakes

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