7-70.0 left bank of the Bol'shaja Kuonamka River (Cambrian of Russian Federation)

Also known as A-54 in Val'kov 1975

Where: Siberia, Russian Federation (70.7° N, 112.9° E)

• Paleocoordinates: 4.5° S, 62.3° W (Wright 2013)

• outcrop-level geographic resolution

When: Calodiscus-Erbiella trilobite zone, Emyaksin Formation, Botomian (516.0 - 512.9 Ma)

• Inferred from several works. Also given as Emyaksin Formation.

• bed-level stratigraphic resolution

Environment/lithology: limestone

• Not described in any detail.

Size classes: macrofossils, microfossils

Preservation: cast

Reposited in the PIN

Primary reference: A. Kouchinsky, S. Bengtson, S. Clausen and M. J. Vendrasco. 2013. An early Cambrian fauna of skeletal fossils from the Emyaksin Formation, northern Siberia. Acta Palaeontologica Polonica 60(2):421-512 [P. Wagner/P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 174258: authorized by Pete Wagner, entered by Pete Wagner on 07.11.2015

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Helcionelloida
  - Stenothecidae
"Mellopegma uslonicum" = Mellopegma uslonica
"Mellopegma uslonicum" = Mellopegma uslonica Parkhaev 2004
  - Helcionellidae
Leptostega hyperborea, "Figurina cf. nana" = Capitoconus nana, Pararaconus sp.
Leptostega hyperborea Parkhaev 2005
"Figurina cf. nana" = Capitoconus nana Zhou and Xiao 1984
Pararaconus sp. Bengtson et al. 1990
 Helcionellida - Pelagiellidae
Pelagiella "sp. 1", Pelagiella "sp. 2"
Pelagiella "sp. 1" Matthew 1895
The fossils described here are generally most similar to Pelagiella madianensis (Zhou and Xiao, 1984) illustrated in Gravestock et al. (2001: pl. 46), but the ornamentation of P. madianensis consists of granules arranged in spiral rows (Parkhaev in Gravestock et al. 2001). The ornamentation of Pelagiella sp. 1 herein consists of comarginal ribs similarly spaced as in the middle Cambrian Pelagiella sp. cf. Costipelagiella zazvorkai from the overlying Kuonamka Formation (Kouchinsky et al. 2011), but they do not appear to extend to the peripheral portion of the whorl.
Pelagiella "sp. 2" Matthew 1895
The fossils are discussed as Pelagiella cf. subangulata by Kouchinsky (2000a: 135, fig. 14).
 Helcionellida - Yochelcionellidae
? Enigmaconus pyramidalis n. sp.
? Enigmaconus pyramidalis n. sp. Kouchinsky et al. 2013
 Helcionellida - Trenellidae
Mackinnonia anabarica, Parailsanella "sp. 2"
Mackinnonia anabarica Parkhaev 2005
Parailsanella "sp. 2" Voronova et al. 1987
Bivalvia
 Fordillida - Fordillidae
"Fordilla cf. sibirica" = Fordilla troyensis
"Fordilla cf. sibirica" = Fordilla troyensis Barrande 1881 clam
Hyolitha
 Orthothecida -
? Orthothecida "sp. indet. 1", ? Orthothecida "sp. indet. 2", Tetratheca clinisepta
 Orthothecida - Triplicatellidae
Triplicatella papilio, Triplicatella cf. peltata, Triplicatella sinuosa
Triplicatella cf. peltata Skovsted et al. 2004
Triplicatella sinuosa Skovsted et al. 2004
 Orthothecida - Orthothecidae
"Lenatheca" groenlandica
 Orthothecida - Circothecidae
Conotheca spp., Conotheca cf. mammilata
Conotheca spp. Rozanov et al. 1969
Conotheca cf. mammilata Rozanov et al. 1969
 Hyolithida - Sulcavitidae
? Linevitus minutus
Edrioasteroidea
  -
Edrioasteroidea "plates"
Eocrinoidea
  -
Eocrinoidea "plates"
Coeloscleritophora
 Chancelloriida - Chancelloriidae
Chancelloria spp.
Chancelloria spp. Walcott 1920
Aetholicopalla adnata
  -
Aetholicopalla adnata
Aetholicopalla adnata Bengtson et al. 1990
Heteractinida
  -
Heteractinida "indet."
 Pseudoconodontida -
Mongolitubulus spinosus