Rockford (House) (Devonian of the United States)

Where: Floyd County, Iowa (43.1° N, 93.0° W: paleocoordinates 29.2° S, 37.6° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

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

• member-level stratigraphic resolution

Environment/lithology: marine; shale

• paleoenvironment not discussed

limestones are present at the base of the member, but all other collections from the outcrop are from the overlying shales

Collection methods: "loose specimens from the quarry floor"

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 3407: authorized by John Alroy, entered by John Alroy on 31.07.1999, edited by Alycia Stigall

Creative Commons license: CC BY (attribution)

Taxonomic list

• total number of specimens "over 2400"
Show authors, comments, and common names
unclassified
  -
Cranaenella sp.
Bryozoa
  -
Bryozoa indet.
Bryozoa indet. Ehrenberg 1831
"stick bryozoans"
Stenolaemata
 Cryptostomata - Fenestellidae
Fenestella sp.
Fenestella sp. Lonsdale 1839
Rhynchonellata
 Rhynchonellida - Petasmariidae
Pugnoides calvini
 Rhynchonellida - Leiorhynchidae
Leiorhynchus argenteum
 Orthida - Schizophoriidae
"Schizophoria iowaensis" = Schizophoria (Schizophoria) iowensis
"Schizophoria iowaensis" = Schizophoria (Schizophoria) iowensis Hall 1858
 Atrypida - Atrypidae
"Pseudatrypa devoniana" = Pseudoatrypa devoniana, Spinatrypa rockfordensis
"Pseudatrypa devoniana" = Pseudoatrypa devoniana Webster 1921
 Spiriferida - Adolfiidae
Adolfia sp.
Adolfia sp. Gürich 1909
 Spiriferida - Spiriferidae
Spirifer orestes
 Spiriferida - Theodossiidae
Theodossia hungerfordi
 Spiriferida - Cyrtospiriferidae
Cyrtospirifer whitneyi
 Spiriferida - Spinocyrtiidae
Spinocyrtia macbridei, Spinocyrtia westerensis, Spinocyrtia cyrtinaformis, Platyrachella sp.
 Spiriferinida - Cyrtinidae
Cyrtina iowaensis
Strophomenata
 Strophomenida - Strophodontidae
"Strophodonta thomasi" = Strophomena (Strophodonta)
"Strophodonta thomasi" = Strophomena (Strophodonta)
originally entered as "Stropheodonta thomasi"
 Strophomenida - Leptodontellidae
Sulcatostrophia sp.
 Strophomenida - Strophonellidae
Strophonella sp.
Strophonella sp. Hall 1879
 Strophomenida - Douvillinidae
Douvillina variabilis, Douvillina arcuata
Douvillina arcuata Hall 1858
 Productida - Productellidae
Productella sp.
Productella sp.
sp. (bisimilis on label)
 Productida - Monticuliferidae
Devonoproductus walcotti
 Orthotetida - Schuchertellidae
Schuchertella parva
Craniata
 Craniida - Craniidae
"Crania famelica" = Petrocrania famelica
"Crania famelica" = Petrocrania famelica Hall and Whitfield 1872
Gastropoda
 Streptoneura -
Archaeogastropoda indet.
Archaeogastropoda indet. Thiele 1925 snail
originally Pleurotomaria; PJW3
 Euomphalina - Palaeotrochidae
Floyda sp., Floyda concentrica
Floyda sp. Webster 1905 snail
originally entered as "Floydia sp."
Floyda concentrica Webster 1905 snail
originally entered as "Floydia concentrica"
 Euomphalina - Platyceratidae
"Diaphorostoma sp." = Platyostoma
"Diaphorostoma sp." = Platyostoma Conrad 1842 snail
 Euomphalina - Euomphalidae
Straparollus sp.
Straparollus sp. de Montfort 1810 snail
Bivalvia
 Cardiidia - Grammysiidae
Grammysia sp.
Grammysia sp. de Verneuil 1847 clam
 Lucinida - Mactromyidae
Paracyclas sabini
Anthozoa
  -
Anthozoa indet., Anthozoa indet.
Anthozoa indet. Ehrenberg 1834
"solitary corals"
Anthozoa indet. Ehrenberg 1834
"encrusting corals"