PBDB Collection

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

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

• Paleocoordinates: 24.2° N, 26.2° W (Wright 2013)

• coordinate based on nearby landmark

When: Ozarkodina eurekaensis conodont zone, Siyak Formation, Lochkovian (419.2 - 410.8 Ma)

• PJW: middle beds should be Ozarkodina eurekaensis zone.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; shelly/skeletal, gray limestone

• "...lower part comprises grey, thick-stratified, microcrystalline limestones similar to lsts in Lower Siyak and grades upward to light grey, massive, locally organogenous limestones..."

Size class: macrofossils

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 13942: authorized by Michael Foote, entered by Michael Foote on 03.05.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

• "More than 70 species of brachiopods and corals are found. The most characteristic are listed..."

Show authors, comments, and common names

unclassified
-	Nymphorhynchus nympha Nymphorhynchus nympha
Rhynchonellata
Athyridida - Rhynchospirinidae	? Rhynchospirina sijakensis ? Rhynchospirina sijakensis
Athyridida - Athyrididae	Protathyris praecursor, Protathyris celsus, Protathyris insuetus Protathyris praecursor Protathyris celsus Protathyris insuetus
Rhynchonellida - Innaechiidae	Decoropugnax berenice Decoropugnax berenice
Rhynchonellida - Hebetoechiidae	Hebetoechia vagranica Hebetoechia vagranica
Rhynchonellida - Glossinotoechiidae	Glossinulus (Glossinotoechia) gracianovae Glossinulus (Glossinotoechia) gracianovae
Rhynchonellida - Uncinulidae	Uncinulus gurjevskensis Uncinulus gurjevskensis
Rhynchonellida - Camarotoechiidae	Linguopugnoides paulus, Camarotoechia bieniaszi Linguopugnoides paulus Camarotoechia bieniaszi genus name in quotes
Rhynchonellida - Yunnanellidae	"? Yunnanellina tabuskaensis" = Yunnanella "? Yunnanellina tabuskaensis" = Yunnanella
Atrypida - Septatrypidae	"Atrypopsis thetis" = Septatrypa "Atrypopsis thetis" = Septatrypa
Atrypida - Atrypinidae	Spirigerina supramarginalis Spirigerina supramarginalis Khalfin 1948
Atrypida - Punctatrypidae	Atrypinella losvensis Atrypinella losvensis
Atrypida - Karpinskiidae	Karpinskia vagranensis Karpinskia vagranensis
Orthida - Dicoelosiidae	Dicoelosia biloba Dicoelosia biloba Linnaeus 1758
Pentamerida - Gypidulidae	Ivdelinia procerula, Ivdelinia petropavlowskiensis, Gypidula pelagica, Gypidula optata Ivdelinia procerula Ivdelinia petropavlowskiensis Gypidula pelagica Gypidula optata
Pentamerida - Clorindidae	Clorinda pseudolinguifera, Clorindina vijaica Clorinda pseudolinguifera Clorindina vijaica
Anthozoa
Favositida - Favositidae	Favosites admirabilis, Favosites pseudoregularissimus, Favosites intricatus Favosites admirabilis tabulate coral Favosites pseudoregularissimus tabulate coral Favosites intricatus Pocta 1902 tabulate coral
Stauriida - Mucophyllidae	Pseudamplexus quadripartitus Pseudamplexus quadripartitus horn coral
Stauriida - Spongophyllidae	Spongophyllum halysitoides Spongophyllum halysitoides horn coral
Cystiphyllida - Tryplasmatidae	Tryplasma hercynica Tryplasma hercynica horn coral