M316/40 right bank of the Fomich River (Cambrian of Russian Federation)

Where: Yakutia, Russian Federation (71.8° N, 107.0° E: paleocoordinates 25.1° S, 8.5° W)

• coordinate estimated from map

• small collection-level geographic resolution

When: Dokidocyathus lenaicus - Majatheca tumefacta small shelly zone, 10 Member (Pestrotsvet Formation), Tommotian (525.5 - 521.0 Ma)

• Lower Tommotian; Layer 10; next layer is Atdabanian

• bed-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified, gray, red, argillaceous limestone

• Alteration of dull lilac, pink, claret red and gray argillaceous limestones (p. 51-52).

Size classes: mesofossils, microfossils

Preservation: cast, replaced with phosphate

Primary reference: A. Y. Rozanov, V. V. Missarzhevsky, N. A. Volkova, L. G. Voronova, I. N. Krylov, B.M. Keller, I. K. Korolyuk, K. Lendzion, R. Mikhnyar, N. G. Pykhova, and A. D. Sidorov. 1969. Tommotskiu jarus i problema nizhney granisty kembriya [The Tommotian Stage and the Cambrian lower Boundary problem]. Trudy Geoligske Institut Leningrad 206:1-379 [P. Wagner/P. Wagner/P. Novack-Gottshall]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96393: authorized by Pete Wagner, entered by Pete Wagner on 05.06.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Archaeocyatha
 Archaeocyathida - Loculicyathidae
Paranacyathus subartus, "Robustocyathus moorei" = Cambrocyathellus, "Robustocyathus dotatus" = Cambrocyathellus
Paranacyathus subartus archaeocyath sponge
"Robustocyathus moorei" = Cambrocyathellus archaeocyath sponge
"Robustocyathus dotatus" = Cambrocyathellus archaeocyath sponge
 Archaeocyathida - Dictyocyathidae
Dictyocyathus translucidus
Dictyocyathus translucidus archaeocyath sponge
 Ajacicyathida - Tumulocyathidae
"Kotuyicyathus kotuyikensis" = Tumulocyathus, "Tumulocyathellus sp." = Plicocyathus
"Kotuyicyathus kotuyikensis" = Tumulocyathus archaeocyath sponge
"Tumulocyathellus sp." = Plicocyathus Vologdin 1960 archaeocyath sponge
 Ajacicyathida - Densocyathidae
Tennericyathus kotuyikensis
Tennericyathus kotuyikensis archaeocyath sponge
 Ajacicyathida - Ajacicyathidae
Ajacicyathus tkatschenkoi, Ajacicyathus anabarensis, Ajacicyathus cautus, Ajacicyathus turbidus, Nochoroicyathus ridiculus
Ajacicyathus tkatschenkoi archaeocyath sponge
Ajacicyathus anabarensis archaeocyath sponge
Ajacicyathus cautus archaeocyath sponge
Ajacicyathus turbidus archaeocyath sponge
Nochoroicyathus ridiculus archaeocyath sponge
 Monocyathida - Monocyathidae
Archaeolynthus polaris
Archaeolynthus polaris archaeocyath sponge
 Capsulocyathida - Cryptoporocyathidae
Capsulocyathus sp.
Capsulocyathus sp. archaeocyath sponge
 Capsulocyathida - Coscinocyathidae
Coscinocyathus rojkovi
Coscinocyathus rojkovi archaeocyath sponge
Inarticulata
  -
Inarticulata sp.
Brachiopoda
 Tommotiida - Tommotiidae
"Camena kozlowskii" = Camenella kozlowskii, Camenella garbowskae
"Camena kozlowskii" = Camenella kozlowskii Rozanov and Missarzhevsky 1966
Camenella garbowskae Rozanov and Missarzhevsky 1966
Hyolitha
 Hyolithida - Sulcavitidae
Burithes eretum
 Hyolithida - Hyolithidae
Korilithes sp.
Korilithes sp. Rozanov et al. 1969
 Orthothecida -
Turcutheca sp.
Turcutheca sp. Rozanov et al. 1969
 Orthothecida - Allathecidae
Allatheca degeeri, Majatheca tumefacta
Majatheca tumefacta Rozanov et al. 1969
 Orthothecida - Circothecidae
Conotheca mammilata
Conotheca mammilata Rozanov et al. 1969
Helcionelloida
  - Helcionellidae
"Ginella sp." = Ilsanella, "Latouchella korobkovi" = Oelandiella korobkovi
"Ginella sp." = Ilsanella Missarzhevsky 1981
"Latouchella korobkovi" = Oelandiella korobkovi Vostokova 1962