Utuk-Khaya Mountains, unit 6 (Cambrian of Russian Federation)

Also known as Reef 3791

Where: Tuva, Russian Federation (51.7° N, 92.2° E: paleocoordinates 6.1° S, 7.8° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Akdurug Formation, Botomian (516.0 - 512.9 Ma)

• 60 m thick, Sanashtykgol stage

• group of beds-level stratigraphic resolution

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

• small bioherms

Size class: macrofossils

Collection methods: peel or thin section,

Primary reference: D. V. Osadchaya, L. N. Kashina, I. T. Zhuravleva and N. P. Borodina. 1979. Stratigrafiya i arkheotsiaty nizhnego kembriya Altaye-Sayanskoy skladchatoy oblasti [Lower Cambrian stratigraphy and archaeocyatha of the Altay-Sayan fold belt]. Trudy Instituta Geologii i Geofiziki, Sibirskoye Otdeleniye 380:1-215 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 81480: authorized by Wolfgang Kiessling, entered by Uta Merkel on 26.06.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Artiopoda
 Agnostida - Hebediscidae
"Hebediscus sp." = Dipharus
"Hebediscus sp." = Dipharus Clark 1923
Trilobita
 Corynexochida - Dolichometopidae
  - Aldonaiidae
 Redlichiida - Redlichinidae
Sajanaspis sp. Repina 1959 trilobite
 Redlichiida - Chengkouaspididae
 Redlichiida - Ellipsocephalidae
Ellipsocephalus sp. Zenker 1833 trilobite
Archaeocyatha
 Archaeocyathida - Archaeopharetridae
Protopharetra ex gr. dubiosa archaeocyath sponge
 Archaeocyathida - Dictyocyathidae
Bottonaecyathus condensus archaeocyath sponge
 Monocyathida - Monocyathidae
Archaeolynthus unimurus archaeocyath sponge
 Ajacicyathida - Jakutocarinidae
Russocyathus rodionovae archaeocyath sponge
 Ajacicyathida - Bronchocyathidae
Denaecyathus cf. biporosus archaeocyath sponge
 Ajacicyathida - Ajacicyathidae
Sibirecyathus sp., "Aldanocyathus monokensis" = Nochoroicyathus
Sibirecyathus sp. Vologdin 1937 archaeocyath sponge
"Aldanocyathus monokensis" = Nochoroicyathus archaeocyath sponge
 Ajacicyathida - Sajanocyathidae
Irinaecyathus grandiperforatus archaeocyath sponge
 Ajacicyathida - Densocyathidae
Leptosocyathus sp. archaeocyath sponge
 Ajacicyathida - Vologdinocyathidae
Kordecyathus sp. archaeocyath sponge
 Ajacicyathida - Erbocyathidae
Ladaecyathus sp. archaeocyath sponge
 Capsulocyathida - Coscinocyathidae
Coscinocyathus dianthus archaeocyath sponge
 Capsulocyathida - Clathricoscinidae
Clathricoscinus vassilievi archaeocyath sponge