Also known as Vachnevo, Vahnevo, Wachnjewo; Sharzhenga River, Sharjenga River, Fluss Scharschenga; Yug River Basin
Where: Vologda, Russian Federation (59.8° N, 45.2° E: paleocoordinates 34.1° N, 33.2° E)
• coordinate based on nearby landmark
• outcrop-level geographic resolution
When: Olenekian (251.2 - 247.2 Ma)
• Vetlugian, Zone V (Vjushkov & Chudinov, 1956).
•Rybinskian, Lower Olenekian, Lower Triassic (Sennikov, 2008).
•Chronostratigraphy, originally entered as >>Early/Lower Triassic<<, is rendered more precisely according to Sennikov (2008). Formation name >>Vetlugian Series<< is removed for it is no lithostratigraphic term.
• member-level stratigraphic resolution
Environment/lithology: fluvial; sandstone
Size class: macrofossils
Collected by I. A. Efremov in 1927–1929; reposited in the PIN
Primary reference: J. 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]more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 28479: authorized by John Alroy, entered by Robin Whatley on 16.02.2003, edited by Torsten Liebrecht, Richard Butler and Bethany Allen
Creative Commons license: CC BY (attribution)
Taxonomic list
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•Reidentification of Chasmatosuchus parvus as Chasmatosuchus sp. by Tatarinov (1961) has been removed from list since a reassignment of the holotype and only specimen actually means a synonymization (TL).
| Osteichthyes | |
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| Amphibia | |
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Benthosuchus sp. Efremov 1936 tetrapod
Thoosuchus sp. Efremov 1940 tetrapod | |
| Reptilia | |
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Chasmatosuchus rossicus n. gen. n. sp.2 Huene 1940 archosauromorph 2252/12 to 15, 2252/381 (type), 2252/383, 2252/384, 2252/386 (all are vertebrals); catalogue numbers are from Sennikov (2008)
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"Microcnemus efremovi n. gen. n. sp." = Microcnemus efremovi2, "Chasmatosuchus parvus n. sp." = Microcnemus efremovi2
"Microcnemus efremovi n. gen. n. sp." = Microcnemus efremovi2 Huene 1940 archosauromorph PIN 2243/161, 2243/162, 2243/163, 2252/37, 2252/38, 2252/54, 2252/61, 2252/69, 2252/94 to 2252/96 (all are vertebrae), 2252/97 to 2252/100, 2252/136, 2252/137 (all are fragments of bones of hind limb), 2252/164, 2252/165 (both are proximal ends of tibiae), 2252/387 (type; femur), 2252/388 (ischium), 2252/389, (incomplete femur), 2252/390 (scapulocoracoid), 2252/391 (tibia), 2252/392 (distal end of femur; identified as distal end of humerus by von Huene, 1940), 2252/393 (distal end of ?ulna), 2252/394 (diaphysis of femur; identified as diaphysis of humerus by von Huene, 1940), 2252/398 to 2252/400, 2252/401 to 2252/403 (all are vertebrae), 2252/404 (distal end of ?radius), 2252/405 to 2252/407 (all are vertebrae), 2252/408 (distal end of tibia); catalogue numbers are from Sennikov (2008)
"Chasmatosuchus parvus n. sp." = Microcnemus efremovi2 Huene 1940 archosauromorph 2252/382 (type); catalogue number is from Sennikov (2008)
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Tichvinskia jugensis n. sp.5
Tichvinskia jugensis n. sp.5 Vjushkov and Chudinov 1956 parareptile PIN 2252/368 (type); previously tentatively referred to Microcnemus efremovi by von Huene (1940, Pl. 2 fig. 3)
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