Bird Hill (Ager) (Devonian of the United States)

Where: Iowa (42.0° N, 93.5° W: paleocoordinates 29.9° S, 38.6° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Cerro Gordo Member (Lime Creek Formation), Frasnian (382.7 - 372.2 Ma)

• from the upper part of the member ("Strophonella Faunule")

• group of beds-level stratigraphic resolution

Environment/lithology: marine; argillaceous shale

• paleoenvironment not discusse

Collection methods: field collection of Ager

Primary reference: P. Wallace. 1978. Homeomorphy between Devonian brachiopod communities in France and Iowa. Lethaia 11:259-272 [J. Alroy/J. Alroy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 3404: authorized by John Alroy, entered by John Alroy on 31.07.1999, edited by Pete Wagner

Creative Commons license: CC BY (attribution)

Taxonomic list

• total number of specimens 752
unclassified
  -
Crinoidea
  -
Crinoidea indet. Miller 1821 Sea lily
0.8%: "crinoid fragments"
Strophomenata
 Productida - Monticuliferidae
 Strophomenida - Strophodontidae
"Strophodonta thomasi" = Strophomena (Strophodonta)
"Strophodonta thomasi" = Strophomena (Strophodonta)
0.27%: originally entered as "Stropheodonta thomasi"
 Strophomenida - Strophonellidae
Strophonella sp. Hall 1879
4.9%
 Strophomenida - Douvillinidae
Douvillina arcuata Hall 1858
17.9%
Rhynchonellata
 Spiriferida - Spiriferidae
 Spiriferida - Cyrtospiriferidae
 Atrypida - Atrypidae
Spinatrypa rockfordensis1, "Pseudatrypa devoniana" = Pseudoatrypa devoniana1
"Pseudatrypa devoniana" = Pseudoatrypa devoniana1 Webster 1921
0.3%
 Rhynchonellida - Camarotoechiidae
 Rhynchonellida - Petasmariidae
 Orthida - Schizophoriidae
"Schizophoria iowaensis" = Schizophoria (Schizophoria) iowensis
"Schizophoria iowaensis" = Schizophoria (Schizophoria) iowensis Hall 1858
8.9%
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
2.9%: "stick bryozoans"
Bryozoa indet. Ehrenberg 1831
0.13%: "encrusting bryozoans'
Stenolaemata
 Trepostomida - Amplexoporidae
 Cryptostomata - Fenestellidae
Fenestella sp. Lonsdale 1839
0.13%
Gastropoda
 Bellerophontida -
""Bellerophontoidea" indet." = Bellerophontoidea2
""Bellerophontoidea" indet." = Bellerophontoidea2 M'Coy 1851 snail
0.13%
 Euomphalina - Euomphalidae
"Straparollus argutus" = Philoxene argutus
"Straparollus argutus" = Philoxene argutus Fenton and Fenton 1924 snail
0.27%
 Euomphalina - Palaeotrochidae
Westerna gigantea Webster 1888 snail
0.13%: originally entered as "Westernia gigantea"
Bivalvia
 Lucinida - Mactromyidae
Paracyclas sabini clam
0.13%
Anthozoa
 Stauriida - Zaphrentidae
Heliophyllum solidum Hall and Whitfield 1873 horn coral
5.7%
 Stauriida - Kyphophyllidae
Tabulophyllum sp. Fenton and Fenton 1924 horn coral
0.27%