Churiomorphs from the Upper Vendian Chernyi Kamen Formation of the Central Urals (Perm Region)

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Resumo

During the study of the Vilukha and Sinii Kamen members of the Chernyi Kamen Formation of the Upper Vendian Sylvitsa Group, which are exposed along the valley of the Shirokovsky Reservoir (Kos’va River area, Perm Krai Region of Russia), a complex body-trace fossils of the Vendian soft-bodied biota have been found for the first time in the Central Urals. Among them the chuariomorph-like species Beltanelliformis konovalovi, previously described from the Konovalovka Member of the Chernyi Kamen Formation, is identified. However, the results of morphological analysis of the new fossil material revealed a number of principal differences from representatives of the genus Beltanelliformis Menner, 1974. It is shown that the taxon B. konovalovi, most likely, does not belong to this genus and probably needs further revision, and, in turn, the fossil locality on the Shirokovsky Reservoir allows us to establish a new area with fossils of mobile Precambrian organisms.

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Sobre autores

A. Kolesnikov

Geological Institute of the Russian Academy of Sciences

Autor responsável pela correspondência
Email: kolesnikov@ginras.ru
Rússia, Moscow

V. Pankova

Geological Institute of the Russian Academy of Sciences

Email: kolesnikov@ginras.ru
Rússia, Moscow

V. Pankov

Geological Institute of the Russian Academy of Sciences

Email: kolesnikov@ginras.ru
Rússia, Moscow

V. Desyatkin

Geological Institute of the Russian Academy of Sciences

Email: kolesnikov@ginras.ru
Rússia, Moscow

I. Latysheva

Geological Institute of the Russian Academy of Sciences

Email: kolesnikov@ginras.ru
Rússia, Moscow

A. Shatsillo

Geological Institute of the Russian Academy of Sciences; Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences

Email: kolesnikov@ginras.ru
Rússia, Moscow; Moscow

N. Kuznetsov

Geological Institute of the Russian Academy of Sciences

Email: kolesnikov@ginras.ru

Corresponding Member of the RAS

Rússia, Moscow

T. Romanyuk

Schmidt Institute of Physics of the Earth of the Russian Academy of Sciences

Email: kolesnikov@ginras.ru
Rússia, Moscow

Bibliografia

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2. Fig. 1. a, b - scheme of location of a new location of paleontological remains similar to Beltanelliformis konovalovi in the Middle Urals. c - composite section of the Sylvitsa series of the Upper Vendian of the Middle Urals and stratigraphic interval of distribution of new finds. 1 - outcrops of the Sylvitsa series on the day surface; 2 - new location of B. konovalovi in the Shire of the Urals. konovalovi on the Shirokovskoye reservoir (Perm region); 3 - location of B. konovalovi on the river Shirokovskoye (Perm region). konovalovi on the Sylvitsa River (Sverdlovsk Krai). Sylvitsa River (Sverdlovsk region); 4 - position of ash tuffs, from which U-Pb dating of zircon was obtained, in the section of the Sylvitsa series; 5 - Vilukhinskaya Subformation; 6 - Shuryshskaya Subformation; 7 - Cheryomukhovskaya Subformation; 8 - Synekamenskaya Subformation; 9 - Konovalovskaya Subformation; 10 - Krutikhinskaya Subformation; 11 - Kobyloostrovskaya Subformation; 12 - alternation of mudstones, siltstones and sandstones; 13 - alternation of mudstones and siltstones; 14 - evenly and wavy layered siltstones and sandstones; 15 - diamictites; 16 - thinly layered mudstones; 17 - interbedded mudstones and siltstones; 18 - interbedded mudstones, siltstones and sandstones; 19 - interbedded sandstones and siltstones; 20 - interbedded sandstones; 21 - obliquely layered sandstones

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3. Fig. 2. Different variants of preservation of the remains of individual individuals of presumably Beltanelliformis konovalovi from the Chernokamensk Formation at the Shirokovskoye Reservoir: a - sample No. CU21/3-64, Synekamensk Subformation; b - sample No. CU20/6-1, Vilukhinskaya Subformation; c - sample No. CU22/9-56, Synekamensk Subformation; d - sample No. No. CU20/6-1, Vilukhinskaya Subformation; c - Detection No. CU22/9-56, Synekamenskaya Subformation; d - Detection No. CU22/9-2, Synekamenskaya Subformation, counterprint (c); e - Detection No. CU20/6-4, Vilukhinskaya Subformation; f - Detection No. CU21/2-6, Vilukhinskaya Subformation. No. CU21/2-6, Vilukhinskaya Subformity; g - Circ. No. CU 22/10-34, Vilukhinskaya Subformity; h - Circ. No. CU22/9-101, Synekamenskaya Subformity, B. konovalovi is shown by yellow arrows; i - Circ. No. CU21/3-61, Synekamenskaya Subformity; j - Circ. No. CU21/3-73, Synekamensky Subformity; j - Sample No. CU21/3-15, Synekamensky Subformity; k - Sample No. CU21/3-15, Synekamensky Subformity; l - Sample No. CU22/9-20, Synekamensky Subformity; m - Sample No. CU22/9-19, Synekamensky Subformity, counterprint (l)

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4. Fig. 3. Accumulations (clusters) of Beltanelliformis konovalovi remains from the Synekamensky Subformation at the Shirokovskoye Reservoir: a - cluster No. CU22/9-26; b - cluster No. CU 21/3-23; c - cluster No. CU21/3-60; d - cluster No. CU22/9-40; e - cluster No. CU21/3-25

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5. Fig. 4. Combined fossil remains of bodies of soft-bodied organisms with signs of movement found in the Black Kamen Formation at the Shirokovskoye Reservoir: a - cl. No. CU22/9-29, grazing traces (green arrows), casts of fritter-shaped bodies connected by a thread-like formation (yellow arrows), Synekamensky Subformation; b - Detection No. CU22/9-34, Synekamensky Subformation, counterprint (a); c - Detection No. CU22/10-51, Fossiliferous Formation, Fossiliferous Subformation (a); d - Detection No. CU22/10-51, Fossiliferous Subformation (a). No. CU22/10-51, body cast and a probable imprint of death movement (green arrows) inside the sediment, Vilukhinskaya Subvita; d - Sample No. CU22/10-50, counterprint (c), Vilukhinskaya Subvita; (e) - Sample No. CU21/3-7, taphonomic phantoms of pancake-shaped bodies and traces of their movement/grazing (green arrows), Synekamenskaya Subvita; (f) - Sample No. CU21/3-7, taphonomic phantoms of pancake-shaped bodies and traces of their movement/grazing (green arrows), Synekamenskaya Subvita

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