PBDB Collection

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

Osteichthyes
Therapsida - Alrausuchidae	"Biarmosuchus tagax" = Alrausuchus tagax "Biarmosuchus tagax" = Alrausuchus tagax Ivakhnenko 1990 therapsid PIN 3586/6, 3586/14
Synapsida - Varanopidae	Mesenosaurus romeri² Mesenosaurus romeri² Efremov 1938 synapsid PIN 3586/5, 3586/8, 3586/37 to 3586/40, 3586/42, 3586/49
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

¹Ivakhnenko 1997; ²Ivakhnenko 2008; ³Tverdokhlebova and Ivakhnenko 1984