Mansiiskii Fm., Igar region (Ordovician of Russian Federation)

Where: Siberia, Russian Federation (68.0° N, 88.0° E: paleocoordinates 12.2° S, 12.6° E)

• local area-level geographic resolution

When: Lower Member (Ujgur Formation), Mansian (485.4 - 485.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: sand shoal; lithified, ooidal, calcareous grainstone and limestone

• oolitic limestone interbedded with other limestone and calcareous breccia

Size class: macrofossils

Collection methods: JA: marked by Novack-Gottshall without explanation as omitting some genera, some macrofossils, some microfossils, and species names, but apparently complete

Primary reference: A. V. Rozova. 1968. Biostratigrafiya i trilobity verkhnego Kembriya i nizhnego Ordovika severo-zapada Sibirskoy Platformy [Biostratigraphy and trilobites of the Upper Cambrian and Lower Ordovician of the northwestern Siberian platform]. Trudy Instituta Geologii i Geofiziki, Sibirskoye Otdeleniye 36:1-195 [A. Miller/P. Novack-Gottshall/U. Merkel]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 9287: authorized by Arnold Miller, entered by Phil Novack-Gottshall on 12.10.2000

Creative Commons license: CC BY (attribution)

Taxonomic list

• Primarily trilobite biostrat.
Show authors, comments, and common names
unclassified
  -
Dolgueloma sp.
Trilobita
 Ptychopariida - Acrocephalitidae
Mansiella sp.
Mansiella sp. Rozova 1968 trilobite
 Ptychopariida - Plethopeltidae
? Stenopilus sp.
? Stenopilus sp. Raymond 1924 trilobite
 Olenida - Eulomidae
Pseudoacrocephalites sp., Ketyna sp.
Pseudoacrocephalites sp. Maksimova 1962 trilobite
Ketyna sp. Rozova 1963 trilobite
 Olenida - Asaphiscidae
? Kaninia sp.
? Kaninia sp. Walcott and Resser 1928 trilobite
 Corynexochida - Cheilocephalidae
Pseudokoldinia sp.
Pseudokoldinia sp. Rozova 1968 trilobite
Rhynchonellata
 Orthida - Eoorthidae
Apheoorthis sp., Eoorthis sp.
Apheoorthis sp. Ulrich and Cooper 1936
Eoorthis sp. Walcott 1908
 Pentamerida - Tetralobulidae
Tetralobula sp.
Tetralobula sp. Ulrich and Cooper 1936
Pterobranchia
 Dendroidea - Acanthograptidae
Callograptus sp.
Callograptus sp. graptolite