Ust'-Peza, PIN 3586, Lower Mezen' River (Permian to of Russian Federation)

Where: Arkhangelsk, Russian Federation (65.6° N, 44.6° E: paleocoordinates 34.0° N, 33.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Ennatosaurus tecton other zone, Late/Upper Kazanian to Late/Upper Kazanian (272.5 - 264.3 Ma)

• Upper Kazanian substage to lower Tatarian (= Urzhumian); Mezen Assemblage of the Dinocephalian Superassemblage (Golubev 2000)

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

Size class: macrofossils

Reposited in the PIN

Primary reference: M. F. Ivakhnenko. 2003. Eotherapsids from the East European Placket (Late Permian). Paleontological Journal 37(Suppl. 4):S339-S465 [R. Butler/R. Butler]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 187646: authorized by Richard Butler, entered by Richard Butler on 07.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Procolophonomorpha - Nycteroleteridae
Bashkyroleter mesensis1, Macroleter poezicus n. sp.3
Bashkyroleter mesensis1 Ivakhnenko 1997 parareptile
PIN 3586/17
Macroleter poezicus n. sp.3 Tverdokhlebova and Ivakhnenko 1984 parareptile
PIN 3586/1 (type)
 Parareptilia - Nyctiphruretidae
Nyctiphruretus acudens2
Nyctiphruretus acudens2 Efremov 1938 parareptile
PIN 3586/79
Osteichthyes
 Synapsida - Varanopidae
Mesenosaurus romeri2
Mesenosaurus romeri2 Efremov 1938 synapsid
PIN 3586/5, 3586/8, 3586/37 to 3586/40, 3586/42, 3586/49
 Therapsida - Alrausuchidae
"Biarmosuchus tagax" = Alrausuchus tagax
"Biarmosuchus tagax" = Alrausuchus tagax Ivakhnenko 1990 therapsid
PIN 3586/6, 3586/14
1Ivakhnenko 1997; 2Ivakhnenko 2008; 3Tverdokhlebova and Ivakhnenko 1984