Tapsa River basin, Vadi-Bala creek, Section 226, Band 4 (Cambrian of Russian Federation)

Also known as Reef 3416

Where: Tuva, Russian Federation (51.9° N, 94.4° E: paleocoordinates 6.5° S, 5.4° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Band 4 Member (Il'chir Formation), Atdabanian (520.0 - 516.0 Ma)

• Band 4 (~150m thick) has a tectonic contact to the underlying Band 3 which is confined to Vadi-Bala organogenic massif (Il'chir Fm.). Kameshkian age. PJW: This should be Il'chir, too.

• member-level stratigraphic resolution

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

• Tuffs, tuffites, and more rarely dacite porphyries of dirty-brown, gray or greenish-gray color, with lenses of algal and archaeocyathid-algal-limestones, massive and dolomitized.

Size class: macrofossils

Collection methods: The specimens are housed in the Chernyshev Central Scientific Research Geological Prospecting Museum (TsNIGRmuzey) in St. Petersburg.

Primary reference: D. V. Kotel'nikov. 1995. New archaeocyathids from the Lower Cambrian Vadi-Bala organogenic complex (Central Tuva). Paleontological Journal 29(2):22-33 [M. Aberhan/S. Nurnberg/S. Nurnberg]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 51432: authorized by Martin Aberhan, entered by Sabine N├╝rnberg on 05.06.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

• Only Archaeocyathids.
 Ajacicyathida - Asterocyathidae
Erismacoscinus sp. Debrenne 1958 archaeocyath sponge
Erismacoscinus stepanovi archaeocyath sponge
 Ajacicyathida - Dokidocyathidae
Dokidocyathus sp. Taylor 1910 archaeocyath sponge
 Ajacicyathida - Bronchocyathidae
Morenicyathus sp. archaeocyath sponge
Cyclocyathella ex gr. repinae Okuneva and Repina 1973 archaeocyath sponge
 Ajacicyathida - Densocyathidae
Rectannulus sp. Debrenne 1977 archaeocyath sponge
Tennericyathus ex gr. rarus Osadchaya et al. 1979 archaeocyath sponge
Leptosocyathus ex gr. elogantus archaeocyath sponge
 Ajacicyathida - Sajanocyathidae
Irinaecyathus ex gr. optimus archaeocyath sponge
Formosocyathus tugarinovi archaeocyath sponge
Formosocyathus spinosus archaeocyath sponge
 Ajacicyathida - Ajacicyathidae
Stapicyathus sp. Debrenne 1964 archaeocyath sponge
Sibirecyathus sp. Vologdin 1937 archaeocyath sponge
Nochoroicyathus sp. Zhuravleva 1951 archaeocyath sponge
Nochoroicyathus chassactuensis archaeocyath sponge
Orbicyathus contortus archaeocyath sponge
Rotundocyathus chemtschikensis archaeocyath sponge
 Ajacicyathida - Ethmocyathidae
Gnaltacyathus sp. archaeocyath sponge
Baikalocyathus sp. archaeocyath sponge
Degeletticyathus sp. archaeocyath sponge
 Ajacicyathida - Tumulifungiidae
"Arturocyathus sp." = Subtumulocyathellus
"Arturocyathus sp." = Subtumulocyathellus Osadchaya et al. 1979 archaeocyath sponge
 Monocyathida - Monocyathidae
Archaeolynthus sp. Taylor 1910 archaeocyath sponge
 Monocyathida - Favilynthidae
Favilynthus sp. Debrenne and Zhuravleva 1974 archaeocyath sponge
 Archaeocyathida - Loculicyathidae
Cambrocyathellus sp. archaeocyath sponge
 Archaeocyathida - Archaeopharetridae
Protopharetra sp. Bornemann 1884 archaeocyath sponge
 Capsulocyathida - Alataucyathidae
Alataucyathus sp. archaeocyath sponge