Dunn Hill Quarry, Criner Hills (Ordovician of the United States)

Where: Carter County, Oklahoma (34.1° N, 97.2° W: paleocoordinates 22.3° S, 73.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Erismodus quadridactylus conodont zone, Pooleville Member (Bromide Formation), Blackriveran (460.9 - 449.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: fine-grained, argillaceous limestone and shale

• Limestone, light-gray, very fine-grained, argillaceous, well-indurated, thin-bedded, with some shale seams, fossiliferous.

Size class: macrofossils

Preservation: original calcite

Reposited in the BMNH

Primary reference: A. B. Smith and J. J. Savill. 2001. Bromidechinus, a new Ordovician echinozoan (Echinodermata), and its bearing on the early history of echinoids . Transactions of the Royal Society of Edinburgh 92:137-147 [P. Wagner/P. Wagner/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 73277: authorized by Pete Wagner, entered by Pete Wagner on 07.06.2007, edited by Loic Villier

Creative Commons license: CC BY (attribution)

Taxonomic list

• See Sprinkle 1982 for more details
 Rhombifera - Glyptocystidae
Tanaocystis watkinsi7
4 m, 9 to 12 m, and 12 m below top
 Rhombifera - Glyptocystitidae
Quadrocystis graffhami7 Sprinkle 1982
9 to 12 m below top
 Rhombifera - Pleurocystitidae
Crinoidea
 Porocrinida -
Porocrinus bromidensis9 Sea lily
3 m below the Viola Limestone
 Hybocrinida - Hybocrinidae
 Eustenocrinida - Acolocrinidae
Acolocrinus crinerensis6 Sea lily
float about 9 m below the Viola Limeston
 Myelodactylida - Iocrinidae
Peltacrinus sculptatus10 Sea lily
2.2 m below the Viola Limestone
 Diplobathrida - Rhodocrinitidae
Archaeocrinus subovalis3 Sea lily
0.3, 2.2, 11.0, and 15.5 m below the Viola Limestone
 Diplobathrida - Cleiocrinidae
Cleiocrinus bromidensis n. sp.3 Sea lily
0.3 m below the Viola Limestone, Bromide Formation, at Dunn Quarry. The species is known also from 2.2, 2.5, and 7.5 m below the Viola Limeston
 Camerata - Reteocrinidae
Reteocrinus depressus n. sp.3 Sea lily
in upper 12.5 m and 2.5 m below the Viola Limestone
Soluta
 Syringocrinida - Iowacystidae
Myeinocystites natus5
the south end of Dunn Quarry
Edrioasteroidea
  - Pyrgocystidae
Pyrgocystis "sp. B"4 Bather 1915
Echinoidea
  -
Bromidechinus rimaporus n. gen. n. sp.
Bromidechinus rimaporus n. gen. n. sp. Smith and Savill 2001 sea urchin
Asteroidea
 Hadrosida - Urasterellidae
Urasterella sp.2 McCoy 1851 sea star
3 m below the Viola Limestone
Stenuroidea
  - Embolasteridae
Embolaster graffhami n. gen. n. sp.1
Embolaster graffhami n. gen. n. sp.1 Blake 2008