Eohalysiocrinus-Decaschisma Assoc., Birdsong Shale, Vulcan Materials Quarry (Devonian of the United States)

Where: Tennessee (35.9° N, 88.1° W: paleocoordinates 36.1° S, 49.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Birdsong Shale Formation, Lochkovian (419.2 - 410.8 Ma)

• "Lower Devonian (Gedinnian)...Upper portion of Birdsong Shale"

• formation-level stratigraphic resolution

Environment/lithology: offshore; gray, calcareous shale and shelly/skeletal, argillaceous limestone

• Material generally well preserved; similar to bryozoan thickets of Rochester Shale, Keyser Limestone etc.; rapid deposition in low-energy environment inferred; BA 4.

•SEP environmental call based on given info

• "...about 5 m of interbedded, thin (1 cm), bryozoan-rich limestone, alternating with gray, calcareous, fossiliferous shale...The limestones are dominantly muddy wackestones and packstones."

Primary reference: T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 26786: authorized by Michael Foote, entered by Michael Foote on 31.10.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

• Fauna is said to include 21 speceis of crinoids in 18 genera, but not all of these are listed. Brachiopods are also omitted.
Show authors, comments, and common names
Blastoidea
 Fissiculata - Phaenoschismatidae
Decaschisma lorae
Decaschisma lorae Dunbar 1920 blastoid
Crinoidea
 Myelodactylida - Myelodactylidae
Myelodactylidae indet.
Myelodactylidae indet. Miller 1883 Sea lily
 Disparida - Synbathocrinidae
Theloreus sp.
Theloreus sp. Moore 1962 Sea lily
 Calceocrinida - Calceocrinidae
Eohalysiocrinus "n. sp. 1", Eohalysiocrinus "n. sp. 2"
Eohalysiocrinus "n. sp. 1" Prokop 1970 Sea lily
"two new species of Eohalysiocrinus"
Eohalysiocrinus "n. sp. 2" Prokop 1970 Sea lily
"two new species of Eohalysiocrinus"
 Cyathocrinida - Thalamocrinidae
Thalamocrinus spp.
Thalamocrinus spp. Miller and Gurley 1895 Sea lily
"two species"
 Sagenocrinida - Lecanocrinidae
Lecanocrinus sp.
 Camerata -
Camerata indet.
Camerata indet. Wachsmuth and Springer 1885 Sea lily
 Diplobathrida - Dimerocrinitidae
Dimerocrinites spp.
Dimerocrinites spp. Phillips 1839 Sea lily
"two species"
 Monobathrida - Periechocrinidae
Stiptocrinus sp.
Stiptocrinus sp. Kirk 1946 Sea lily
 Monobathrida - Dolatocrinidae
Dolatocrinus helderbergianus
Cyclocystoidea
  - Cyclocystoididae
Sievertsia sp.
Sievertsia sp. Smith and Paul 1982
Echinoidea
  -
Echinoidea indet.
Echinoidea indet. Leske 1778 sea urchin
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
ramose
Brachiopoda
  -
Brachiopoda indet.
Brachiopoda indet. Cuvier 1805