Transition zone trilobites, Gorniy Altay, Russia - Poletaeva and Romanenko 1970 (Cambrian of Russian Federation)

Where: Gorniy Altay Republic, Russian Federation (52.0° N, 86.0° E: paleocoordinates 5.2° S, 15.3° E)

• coordinate based on political unit

• basin-level geographic resolution

When: Mayan (504.5 - 499.5 Ma)

• Fossils collected in the upper 800m of the section found in the basins of the Tandoshka and Tagaza Rivers.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, gray, green sandstone and lithified siltstone

• gray-green sandstone, siltstone and claystone

Collection methods: Represents the transition from Middle to Upper Cambrian strata.

Primary reference: O. K. Poletaeva and Y.e. V. Romanenko. 1970. Middle and Late Cambrian trilobites of the Altay. Paleontological Journal 4(2):216-228 [M. Patzkowsky/P. Borkow]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 10175: authorized by Mark Patzkowsky, entered by Phil Borkow on 22.02.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

• Trilobites described are those of the greatest significance for correlation of the enclosing deposit with synchronous deposits of other regions.
Show authors, comments, and common names
unclassified
  -
Coryneochus terminalis n. sp.
Coryneochus terminalis n. sp.
50 cephala and pygidia
Trilobita
 Olenida - Aphelaspidae
Nganasanella sp. n. sp.
Nganasanella sp. n. sp. Rozova 1963 trilobite
 Ptychopariida - Marjumiidae
Modocia sp.
Modocia sp. Walcott 1924 trilobite
 Ptychopariida - Acrocephalitidae
Acrocephalites sp.
Acrocephalites sp. Wallerius 1895 trilobite
 Ptychopariida - Catillicephalidae
Buttsia pinga, Onchonotellus sp.
Buttsia pinga trilobite
Onchonotellus sp. Lermontova 1956 trilobite
 Ptychopariida - Diceratocephalidae
Ajrikina sp.
Ajrikina sp. Kryskov 1963 trilobite
 Ptychopariida - Lorenzellidae
Pseudolorenzella minuta n. gen. n. sp., Lorenzella sp.
Pseudolorenzella minuta n. gen. n. sp. trilobite
30 cranidia
Lorenzella sp. Kobayashi 1935 trilobite
 Ptychopariida - Liostracinidae
Aplexura sp.
Aplexura sp. Rozova 1963 trilobite
 Asaphida - Remopleurididae
Oculeus sp., Oculeus parvulus n. gen. n. sp., Oculeus fidus n. sp.
Oculeus sp. Poletaeva and Romanenko 1970 trilobite
Oculeus parvulus n. gen. n. sp. trilobite
30 cranidia and 2 free cheeks
Oculeus fidus n. sp. trilobite
26 cranidia
 Corynexochida - Corynexochidae
Corynexochus sp.
Corynexochus sp. Angelin 1854 trilobite
Artiopoda
 Agnostida - Eodiscidae
Opsidiscus altaicus n. sp., Opsidiscus depolitus n. sp.
Opsidiscus altaicus n. sp.
8 cephala and 10 pygidia
Opsidiscus depolitus n. sp.
30 cephala and pygidia
 Agnostida - Agnostidae
Connagnostus tandoshkensis n. sp., Agnostus cf. angustus, Homagnostus bulbus
Connagnostus tandoshkensis n. sp.
20 cephala and pygidia
 Agnostida - Ptychagnostidae
Lejopyge sp.
Lejopyge sp. Hawle and Corda 1847
 Agnostida - Diplagnostidae
? Linguagnostus reconditus n. sp.
? Linguagnostus reconditus n. sp. Poletaeva and Romanenko 1970
5 dorsal shells and 30 cephala/pygidia