Mikhailovskii Mine, Zheleznogorsk: Early/Lower Frasnian, Russian Federation
collected by Moloshnikov 2002

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Palaeonisciformes - Palaeoniscidae
Palaeoniscidae indet. Vogt 1852
Onychodontiformes - Onychodontidae
Onychodus sp. Newberry 1857
Dipnoi - Dipteridae
Dipteridae indet. Owen 1846
Osteolepididae
Osteolepididae indet. Cope 1887
Osteolepiformes - Panderichthyidae
Panderichthys sp. Gross 1941
Dipnomorpha - Holoptychiidae
Glyptolepis sp. Agassiz 1843
Holoptychius sp. Agassiz 1843
Laccognathus sp. Gross 1941
Chondrichthyes
Chondrichthyes indet. Huxley 1880
Chondrichthyes - Diplacanthiformes
Devononchus concinnus Gross 1940
Chondrichthyes
Haplacanthus sp. Agassiz 1845
Chondrichthyes - Ischnacanthida
Atopacanthus sp. Hussakof and Bryant 1920
Placodermi - Antiarchiformes - Asterolepididae
Asterolepis cf. syasiensis
Asterolepis sp. Eichwald 1840
Asterolepis radiata Rohon 1900
Asterolepis ornata Eichwald 1840
Placodermi - Arthrodira - Coccosteidae
Plourdosteus livonicus Eastman 1896
Placodermi - Ptyctodontida
Ptyctodontida indet. Gross 1932
Placodermi - Ptyctodontida - Ptyctodontidae
Ptyctodus sp. Pander 1858
Pteraspidomorpha - Psammosteiformes - Pycnosteidae
? Tartuosteus zheleznogorskensis n. sp. Moloshnikov 2007
Pteraspidomorpha - Pteraspidiformes - Psammosteidae
Psammosteus cf. praecursor Obruchev 1947
see common names

Geography
Country:Russian Federation
Coordinates: 52.3° North, 35.4° East (view map)
Paleocoordinates:7.9° South, 18.0° East
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Devonian Epoch:Late/Upper Devonian
Stage:Frasnian 10 m.y. bin:Devonian 4
Key time interval:Early/Lower Frasnian
Age range of interval:382.70000 - 379.30000 m.y. ago
Stratigraphy
Stratigraphic resolution:bed
Stratigraphy comments: STRATIGRAPHIC RELATIONS: No lithostratigraphic data reported; Utekhin (1972) assigned the bone beds to the Lower Shchigry Subformation, which is presently referred to the nonstratified Pashi and Kyn (Timan) horizons.. AGE: Lower Frasnian, upper Timan regional stage; since no conodonts or invertebrates occurred in the Devonian beds, they were dated based on the agnathan and fish assemblage. STRATIGRAPHIC POSITION: These beds are approximately 0.5–0.7 m thick, overlying sand, sandstone, and clay strata without faunal remains and underlying the Middle Jurassic beds.
Lithology and environment
Primary lithology:gray,blue poorly lithified claystone
Secondary lithology:black poorly lithified argillaceous sandstone
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Bone beds are bluish gray dense clay, gray and black condensed clayey sand and sandstone. LITHIFICATION: Poorly-lithified, on the basis of figured specimens.
Environment:lagoonal
Geology comments: ENVIRONMENT: Coastal–marine or lagoon.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:taxonomic analysis
Museum repositories:PIN
Collectors:Moloshnikov Collection dates:2002
Collection method comments: COLLECTOR: Moloshnikov (2002). REPOSITORY: Paleontological Institute of the Russian Academy of Sciences (PIN).
Taxonomic list comments:COVERAGE: Exhaustive for marine vertebrate taxa. NOMENCLATURE: Authoritative publication, with modern nomenclature and species-resolution identifications.
Metadata
Database number:90343
Authorizer:A. Hendy Enterer:A. Hendy
Research group:vertebrate
Created:2009-07-17 07:29:24 Last modified:2013-11-25 13:37:23
Access level:the public Released:2009-07-17 07:29:24
Creative Commons license:CC BY
Reference information

Primary reference:
30343. S. V. Moloshnikov. 2007. Psammosteiforms (Agnatha, Heterostraci) from the Lower Frasnian of the Mikhailovskii Mine, Kursk Region, Russia. Paleontological Journal 41(5):84-88 [A. Hendy/A. Hendy]