Rashkov Beds at S-D boundary sections in Dniestr Valley (Silurian of Ukraine)

Where: Ukraine (49.6° N, 23.9° E: paleocoordinates 49.6° N, 23.9° E)

• coordinate based on political unit

• local area-level geographic resolution

When: Trubchyn Member (Skala Formation), Pridoli (423.0 - 419.2 Ma)

• PJW: Was Rashkov Beds, which subsequently has been divided into multiple units. The presence of a bioherm indicates that it is the Trubchyn (=Trubchin) member of the Skala formation. Some more recent works make the Trubchyn a formation.

• formation-level stratigraphic resolution

Environment/lithology: marine; dolomitic, argillaceous limestone and dolomitic marl

• "...consist of limestones, marls, dolomites, dolomitic marls, mudstones, and detrital tuffogenic rocks; the total thickness is 98 m."

Size class: macrofossils

Collection methods: I have combined material from outcrops 44, 35, 39, 85.

Primary reference: O. I. Nikiforova. 1977. Podolia. In A. Martinsson (ed.), The Silurian-Devonian boundary (IUGS Publication, Series A, Number 5) 52-64 [M. Foote/M. Foote/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 13873: authorized by Michael Foote, entered by Michael Foote on 30.04.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
Zosterophyllum
  -
Zosterophyllum sp. Penhallow 1892
Plantae
Algae
 Algae -
Stromatoporoidea
 Stromatoporoidea -
Stromatoporoidea indet. stromatoporoid sponge
 Actinostromatida - Actinostromatidae
Plectostroma malevskii stromatoporoid sponge
Plectostroma podolicum stromatoporoid sponge
 Amphiporida - Amphiporidae
Clathrodictyella mica stromatoporoid sponge
 Syringostromatida - Coenostromatidae
Parallelostroma ex gr. gukovense stromatoporoid sponge
Anthozoa
  -
Anthozoa indet. Ehrenberg 1834
 Rugosa -
Rugosa indet. horn coral
 Stauriida - Endophyllidae
 Stauriida - Expressophyllidae
"Expressophyllum krikovenses" = Micula
"Expressophyllum krikovenses" = Micula Rugose coral
 Stauriida - Lykophyllidae
 Cystiphyllida - Cystiphyllidae
"Patridophyllum digonophylloides" = Lythophyllum
"Patridophyllum digonophylloides" = Lythophyllum horn coral
 Cystiphyllida - Tryplasmatidae
"Pholidophyllum formosum" = Tryplasma
"Pholidophyllum formosum" = Tryplasma horn coral
 Tabulata -
Tabulata indet. tabulate coral
 Auloporida - Syringoporidae
Syringopora sp. Goldfuss 1826 tabulate coral
 Heliolitida - Heliolitidae
Heliolites sp. Dana 1846 tabulate coral
 Favositida - Favositidae
Favosites sp. Lamarck 1816 tabulate coral
 Favositida - Cleistoporidae
"Rhiphaeolites sp." = Riphaeolites
"Rhiphaeolites sp." = Riphaeolites Yanet 1955 tabulate coral
Bivalvia
 Ostreida - Pterineidae
  -
"Pelecypoda indet." = Bivalvia
"Pelecypoda indet." = Bivalvia Linnaeus 1758 clam
Brachiopoda
  -
Brachiopoda indet. Cuvier 1805
Strophomenata
 Orthotetida - Chilidiopsidae
Fardenia sp. Lamont 1935
 Strophomenida - Strophochonetidae
Rhynchonellata
 Rhynchonellida - Trigonirhynchiidae
 Atrypida - Septatrypidae
"Atrypella phoca" = Atrypoidea
"Atrypella phoca" = Atrypoidea
 Spiriferida - Delthyrididae
 Athyridida - Athyrididae
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Stenolaemata
 Cystoporata - Fistuliporidae
Deuteropoda
  -
Ostracoda indet. Latreille 1802 ostracod
Ostracoda
 Leperditicopida -
 Palaeocopida -
 Palaeocopida - Beyrichiidae
"Nodibeyrichia torosa" = Beyrichia
"Nodibeyrichia torosa" = Beyrichia ostracod
 Palaeocopida - Pribylitidae
 Podocopida - Cytherideidae
 Podocopida -
 Leperditellocopida - Aparchitidae
 Hollinocopida - Primitiopsidae
 Beyrichicopida - Aechminidae
Trilobita
  -
Trilobita indet. Walch 1771 trilobite
 Proetida - Proetidae
Proetus conspersus Angelin 1855 trilobite
Crinoidea
 Monobathrida - Actinocrinitidae
"Actinocrinus nuchi" = Actinocrinites
"Actinocrinus nuchi" = Actinocrinites Sea lily