Klyutchevoy Ravine ("Sarmin" series): Late Severodvinian - Early Vyatkian, Russian Federation

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Inostranceviidae
Inostrancevia sp. Amalitski 1922
Anomodontia
Dicynodon cf. trautscholdi Amalitzky 1922
Reptilia - Pareiasauridae
Scutosaurus sp. Hartmann-Weinberg 1930
see common names

Geography
Country:Russian Federation State/province:Tatarstan County:Tetyushi
Coordinates: 55.0° North, 48.8° East (view map)
Paleocoordinates:29.5° North, 43.1° East
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period: Permian Epoch: Guadalupian - Lopingian
Stage: Capitanian - Wuchiapingian 10 m.y. bin: Permian 4
*Period:Late/Upper Permian *Epoch:Zechstein
Key time interval: Late Severodvinian - Early Vyatkian Zone:  IV
Age range of interval: 264.28 - 254.14 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Stratigraphic resolution:group of beds
Stratigraphy comments: Chronostratigraphy originally entered as >>Zechstein<<. Klyutchevoy Ravine [Klyutchevoy Ovrag] is lower Vyatkian according to Ivakhnenko (2008). Ilinskoe Subassemblage of the Sokolki Assemblage is regarded as Late Severodvinian to Early Vyatkian in Golubev (2005, New Mexico Mus. Nat. Hist. Sci. Bull. 30).
Formation name >>Sarmin series<< is removed for it never was a lithostratigraphic term and for it is not used at all in more recent literature (TL).
Lithology and environment
Primary lithology:gray,red sandstone
Includes fossils?Y
Lithology description: "The bone-bearing layer, composed of reddish-grey sands, over 2 m thick.."
Environment:terrestrial indet. Tectonic setting:cratonic basin
Geology comments: author suggests that the environment was similar to that of the North-Dvina
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Preservation of anatomical detail:medium
Fragmentation:frequent
Collection methods and comments
Collection methods:field collection
Collection size:100 specimens
Reason for describing collection:taxonomic analysis
Taxonomic list comments:Three taxa are identified from approx. 100 specimens; most are poorly preserved. The author states that the majority belong to Pareiasaurians, and more rarely to Gorgonopsians and Dicynodonts. The listed taxa are compared with specimens from the Semin Ravine locality (opposite the Klyutchevov locality), and Efremov suggests that Hartmann-Weinberg has misidentified Scutosaurus (present in the Klyutchevov locality) as a new gen. et sp. of Pareiasauridae (Proelginia permiana).
Metadata
Also known as:Volga locality, coll. No. 156, PIN, Volga Expedition of 1931; Klyuchevoy Ravine; Ilinskoe, Il'inskoe, Ilyinskoe, Iljinskoje
Database number:28855
Authorizer:J. Alroy Enterer:R. Whatley
Modifier:T. Liebrecht Research group:vertebrate
Created:2003-02-25 17:02:39 Last modified:2009-12-21 13:29:07
Access level:the public Released:2003-02-25 17:02:39
Creative Commons license:CC BY
Reference information

Primary reference:
7854.5% 47000J. A. Efremov. 1940. Predvaritel'noye opisaniye novykh form permskoy i triasovoy fauny nazemnykh pozvonochnykh SSSR [Preliminary description of new forms from the Permian and Triassic terrestrial vertebrate fauna of the USSR]. Trudy Paleontologicheskogo Instituta Akademiy Nauk SSSR 10(2):1-140 [J. Alroy/R. Whatley/M. Carrano]

Secondary references:

28657 M. F. Ivakhnenko. 2008. Podklass Parareptilia. In M. F. Ivakhnenko and E. N. Kurotchkin (eds.), Iskopaemye pozvonotchnye Rossii i sopredel'nykh stran: Iskopaemye reptilii i ptitsy, Tchast' 1 [Fossil vertebrates of Russia and adjacent countries: Fossil reptiles and birds, Part 1], GEOS, Moscow 49-85 [J. Mueller/T. Liebrecht/T. Liebrecht]