PBDB Collection

Lower Siyak Beds of Siyak River Section (Devonian of Russian Federation)

Where: Bashkir, Russian Federation (53.1° N, 57.4° E: paleocoordinates 0.5° N, 16.3° E)

• coordinate based on nearby landmark

When: Lower Siyak Beds Formation, Lochkovian (419.2 - 410.8 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal, gray limestone and gray, argillaceous shale

• "(1) Grey, stratified, pelitomorphic, microcrystalline, crinoidal limestones...(2) Float of dark grey clay shale [with] small outcrops of grey limestones...(3) grey, bedded, finely crystalline and pelitic limestones... (4) grey, thick-bedded, cryptocrystalline limestones..."

Primary reference: A. P. Tyazheva and R. A. Zhavoronkova. 1977. Southern Urals. in A. Martinsson, ed. The Silurian-Devonian boundary (IUGS, Series A, Number 5). Schweizerbart'sche, Stuttgart. 203-210 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 13941: authorized by Michael Foote, entered by Michael Foote on 03.05.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

Strophomenata
Strophomenida - Douvillinidae	Cymostrophia sp. Cymostrophia sp. Caster 1939
Rhynchonellata
Pentamerida - Gypidulidae	Ivdelinia antiqua, Ivdelinia aff. petropavlowskiensis, Gypidula pelagica, Gypidula optata, Gypidula similis Ivdelinia antiqua Ivdelinia aff. petropavlowskiensis Gypidula pelagica Gypidula optata Gypidula similis
Pentamerida - Clorindidae	Clorinda pseudolinguifera Clorinda pseudolinguifera
Athyridida - Meristidae	Merista stricta Merista stricta
Athyridida - Athyrididae	Protathyris celsus Protathyris celsus
Atrypida - Septatrypidae	"? Hircinisca posthircina" = Septatrypa (Hircinisca) "? Hircinisca posthircina" = Septatrypa (Hircinisca)
Atrypida - Atrypinidae	Spirigerina supramarginalis Spirigerina supramarginalis Khalfin 1948
Atrypida - Atrypidae	Spinatrypina bella Spinatrypina bella
Rhynchonellida - Camarotoechiidae	Camarotoechia bieniaszi, Astutorhyncha ardua, Astutorhyncha deplanata Camarotoechia bieniaszi genus name in quotes Astutorhyncha ardua Astutorhyncha deplanata
Rhynchonellida - Hebetoechiidae	Lanceomyonia borealiformis, Hebetoechia vagranica Lanceomyonia borealiformis Hebetoechia vagranica
Cephalopoda
Orthocerida - Orthoceratidae	Orthoceratidae indet. Orthoceratidae indet. M'Coy 1844
Gastropoda
-	Gastropoda indet. Gastropoda indet. Cuvier 1795 snail
Anthozoa
Cystiphyllida - Cystiphyllidae	Pseudomicroplasma sp. Pseudomicroplasma sp. horn coral
Stauriida - Pycnostylidae	? Zelophyllum sp., Zelophyllum sp. ? Zelophyllum sp. Wedekind 1927 horn coral Zelophyllum sp. Wedekind 1927 horn coral
Stauriida - Mucophyllidae	Pseudamplexus fascicularis Pseudamplexus fascicularis horn coral
Stauriida - Ptenophyllidae	Acanthophyllum ex gr. pseudohelianthoides, Neomphyma originata, Neomphyma rosiformis Acanthophyllum ex gr. pseudohelianthoides horn coral Neomphyma originata horn coral Neomphyma rosiformis horn coral
Favositida - Cleistoporidae	Riphaeolites ramosus, Riphaeolites cf. ramosus, Riphaeolites virgosus Riphaeolites ramosus tabulate coral Riphaeolites cf. ramosus tabulate coral Riphaeolites virgosus tabulate coral
Favositida - Favositidae	Favosites lucidus, Favosites delectus, Favosites intricatus Favosites lucidus tabulate coral Favosites delectus tabulate coral Favosites intricatus Pocta 1902 tabulate coral
Favositida - Parastriatoporidae	Parastriatopora fallacis Parastriatopora fallacis tabulate coral
Favositida - Pachyporidae	Cladopora actuosa Cladopora actuosa tabulate coral