PBDB Collection

Ust'-Nyafta, PIN 3717, Lower Mezen' River (Permian to of Russian Federation)

Also known as Ust-Nyafta

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 187647: 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
Synapsida - Varanopidae	Mesenosaurus romeri³, Pyozia mesenensis n. gen. n. sp.¹ Mesenosaurus romeri³ Efremov 1938 synapsid PIN 3717/1, 3717/4, 3717/10, 3717/18, 3717/19, 3717/34 Pyozia mesenensis n. gen. n. sp.¹ Anderson and Reisz 2004 synapsid PIN 3717/33 (from Ust'-Nyafta)
Therapsida - Niaftasuchidae	Niaftasuchus zekkeli n. gen. n. sp. Niaftasuchus zekkeli n. gen. n. sp. Ivakhnenko 1990 therapsid PIN 3717/36 (type)
Reptilia
Parareptilia - Nyctiphruretidae	Nyctiphruretus acudens³ Nyctiphruretus acudens³ Efremov 1938 parareptile PIN 3717/33
Procolophonomorpha - Nycteroleteridae	Macroleter poezicus⁴, Bashkyroleter mesensis² Macroleter poezicus⁴ Tverdokhlebova and Ivakhnenko 1984 parareptile PIN 3717/12, 32 Bashkyroleter mesensis² Ivakhnenko 1997 parareptile PIN 3717/27

¹Anderson and Reisz 2004; ²Ivakhnenko 1997; ³Ivakhnenko 2008; ⁴Tverdokhlebova and Ivakhnenko 1984