Tsilma River (Triassic of Russian Federation)

Also known as Tsilma-1, Cherepanka-1, Cherepanka-3

Where: Komi, Russian Federation (65.4° N, 52.1° E: paleocoordinates 40.2° N, 30.4° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Charkabozh Formation, Olenekian (251.2 - 247.2 Ma)

• upper part of Charkabozhskaya Svita (Novikov et al., 1990)

•The generic composition of the fauna coincides with the upper part of the Vetlugian "supergorizont" or the Lower Olenekian substage, respectively, which is further supported by the presence of an Early Olenekian palynoassemblage at locality Tsilma-1 (Novikov et al., 1990).

Environment/lithology: terrestrial; lithified, gray, green, red claystone and lithified, coarse-grained siliciclastic

• alternation of red and greenish-grey clay with intercalations of sand and conglomerates

Size class: macrofossils

Reposited in the PIN

• VNIGRI = Vserossiiskii Neftyanoi Nauchno-Isseledovatel'skii Geolograzvedochnyi Institut [All Russia Petroleum Exploration Institute]

Primary reference: I. V. Novikov, V. R. Lozovsky, M. A. Shishkin, and M. G. Minikh. 1990. Novyy gorizont v nizhnem triase Vostochno-Yevropeyskoy platformy [A new horizon in the Lower Triassic of the East European Platform]. Doklady Akademii Nauk SSSR 315(2):453-456 [J. Hunter/D. Ehrenburg/T. Liebrecht]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 39811: authorized by John Hunter, entered by Dina Ehrenburg on 07.06.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Timanophon raridentatus was originally entered as "n. gen, n. sp.". Indeed, Novikov et al. (1990, primary reference) cite the name T. raridentatus as a new form ("нового прогрессивного проколофонина"), but neither do they designate a type specimen, nor do they give a diagnosis or a figure. The official description of T. raridentatus was actually carried out by Novikov (1991). In this work the occurence of T. raridentatus in the Pechora River drainage basin is confirmed, but the type specimen designated and figured therein is said to come from the Mezen' River drainage basin which is west of the Timan Ridge (not east as is the Pechora River drainage basin). The information on the type and referred material of T. raridentatus as given by Novikov (1991) is repeated (and thus confirmed, somehow) by Ivakhnenko (2008). Hence, the entry "n. gen. Timanophon n. sp. raridentatus" (falsely indicating the type occurence) was corrected to "Timanophon raridentatus". (TL, 2015-04-22)
Osteichthyes
 Temnospondyli -
Wetlugasaurus malachovi n. sp. Novikov 1990 tetrapod
Reptilia
 Procolophonia - Procolophonidae
Timanophon raridentatus Novikov 1991 parareptile
PIN 4332/4, 5 (a right pterygoid and a fragment of a left dentary, from Cherepanka-1); PIN 4333/9, 10 (a fragment of a left maxilla and a dentary, from Tsilma-1); details on specimens are from Novikov (1991); Ivakhnenko (2008) furthermore lists a VNIGRI specimen (no. 843/9) from Cherepanka-3 and also allocates the PIN 4332 specimens to that locality
 Eosuchia -
Tsylmosuchus jakovlevi Sennikov 1990 archosauromorph
Osteichthyes
 Stegocephali - Benthosuchidae
Angusaurus tsylmensis n. sp. Novikov et al. 1990 lobe-finned fish
Vyborosaurus mirus n. sp. Novikov et al. 1990 lobe-finned fish