Oepikina Beds, Tazewell County Farm (Ordovician of the United States)

Where: Tazewell County, Virginia (37.0° N, 81.0° W: paleocoordinates 30.0° S, 61.5° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Nemagraptus gracilis graptolite zone, Shannondale Limestone Member (Benbolt Formation), Ashbyan (457.3 - 449.6 Ma)

• Ashbyan, Oepikina beds

• member-level stratigraphic resolution

Environment/lithology: gray, argillaceous limestone

• very argillaceous, nodular-weathering, dark-gray limestones which are best developed in the eastern half of the county

Size classes: macrofossils, microfossils

Primary reference: B. N. Cooper and C. E. Prouty. 1943. Stratigraphy of the Lower Middle Ordovician of Tazewell County, Virginia. Bulletin of the Geological Society of America 54:819-886 [S. Holland/T. Hanson/T. Hanson]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 33982: authorized by Steven Holland, entered by Tori Hanson on 11.08.2003

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Hormogoneae
 Oscillatoriales - Girvanellaceae
Girvanella sp., Girvanella "sp. 2"
Girvanella sp. Nicholson and Etheridge 1878
Girvanella "sp. 2" Nicholson and Etheridge 1878
Ostracoda
 Leperditicopida - Leperditiidae
Leperditia sp.
Leperditia sp. Rouault 1851 ostracod
 Hollinocopida - Eurychilinidae
Eurychilina cf. latimarginata
Eurychilina cf. latimarginata Raymond 1905 ostracod
(Raymond)
Trilobita
 Phacopida - Pterygometopidae
Calliops cf. annulatus
Calliops cf. annulatus Raymond 1905 trilobite
(Raymond)
 Asaphida - Asaphidae
Homotelus elongatus
Homotelus elongatus Raymond 1920 trilobite
Raymond
 Corynexochida - Illaenidae
Bumastus cf. lioderma, Illaenus fieldi
Bumastus cf. lioderma Raymond 1925 trilobite
Raymond
Illaenus fieldi Raymond 1925 trilobite
Raymond
Gastropoda
 Euomphalina - Macluritidae
Maclurites magnus
Maclurites magnus Le Sueur 1818 snail
Lesueur
 Euomphalina - Holopeidae
Holopea scrutator
Holopea scrutator Raymond 1905 snail
Raymond
Rhynchonellata
 Orthida - Plaesiomyidae
"Dinorthis transversa" = Dinorthis transversa, "Dinorthis quadriplicata" = Dinorthis transversa, Dinorthis cf. interstriata, Multicostella brevis, Multicostella platys
"Dinorthis transversa" = Dinorthis transversa Willard 1928
Willard
"Dinorthis quadriplicata" = Dinorthis transversa Willard 1928
Willard
Dinorthis cf. interstriata Willard 1928
Willard
Multicostella platys Billings 1859
(Billings)
 Orthida - Glyptorthidae
Glyptorthis bellarugosa
Glyptorthis bellarugosa Conrad 1843
(Conrad)
 Orthida - Plectorthidae
Mimella melonica, "Mimella superba" = Mimella globosa, Mimella vulgaris, Plectorthis cf. exfoliata
Mimella melonica
(Willard)
"Mimella superba" = Mimella globosa Willard 1928
Butts
Mimella vulgaris Raymond 1911
(Raymond)
Plectorthis cf. exfoliata Raymond 1905
Raymond
 Rhynchonellida - Trigonirhynchiidae
""Camarotoechia" pristina" = Rostricellula pristina
""Camarotoechia" pristina" = Rostricellula pristina Raymond 1905
Raymond
 Rhynchonellida - Sphenotretidae
"Zygospira acutirostris" = Sphenotreta acutirostris
"Zygospira acutirostris" = Sphenotreta acutirostris Hall 1847
(Hall)
 Rhynchonellida - Camarotoechiidae
Camarotoechia cf. varians, Camarotoechia quadriplicata
 Pentamerida - Camerellidae
Camerella cf. varians
Camerella cf. varians Billings 1859
Billings [entered as Camarella varians]
Strophomenata
 Strophomenida - Furcitellidae
Oepikina minnesotensis
Oepikina minnesotensis Winchell 1881
(Winchell)
 Strophomenida - Rafinesquinidae
? Rafinesquina sp., ? Rafinesquina cf. deltoidea
? Rafinesquina sp. Hall and Clarke 1892
? Rafinesquina cf. deltoidea Conrad 1838
(Conrad)
 Strophomenida - Strophomenidae
"Strophomena tennesseensis" = Rhipidomena tennesseensis
"Strophomena tennesseensis" = Rhipidomena tennesseensis Willard 1928
Willard
 Strophomenida - Sowerbyellidae
Sowerbyella sp., Ptychoglyptus sp.
Sowerbyella sp. Jones 1928
Ptychoglyptus sp. Willard 1928
 Strophomenida - Leptellinidae
"? Rafinesquina pulchella" = Apatomorpha pulchella
"? Rafinesquina pulchella" = Apatomorpha pulchella Raymond 1928
Raymond
Stenolaemata
 Cryptostomata - Rhinidictyidae
Pachydictya sp.
Pachydictya sp. Ulrich 1882
 Cystoporata - Ceramoporidae
Anolotichia cf. explanata
Demospongiae
 Sigmatosclerophorida - Dystactospongiidae
Dystactospongia sp.
Dystactospongia sp. Miller 1882 demosponge
 Lithistida - Streptosolenidae
Eospongia roemeri
Eospongia roemeri Billings 1861 demosponge
Billings