Rockford (Ager): Frasnian, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Cranaenella sp.
1 specimen
0.2%
Crinoidea
Crinoidea indet. Miller 1821
1 fragment
0.2%: "fragments"
Gastropoda - Euomphalina - Palaeotrochidae
Floyda gigantea (Hall and Whitfield 1873)
15 specimens
replaced by Floyda concentrica
2.9%: originally entered as "Floydia gigantea"
Gastropoda - Euomphalina - Platyceratidae
Diaphorostoma antiquum (Webster 1905)
8 specimens
original and current combination Platyostoma antiquuis
1.5%
Gastropoda - Bellerophontida
Bellerophon sp. de Montfort 1808
1 specimen
0.2%
    = informal Bellerophontoidea indet. M'Coy 1851
Wagner 2023
corrected as Bellerophontoidea
Bivalvia - Lucinida - Mactromyidae
Paracyclas sabini
4 specimens
0.8%: originally entered as "Paracylcas sabini"
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Cupularostrum saxatillis
Rode and Lieberman 2004
Cupularostrum sp. Sartenaer 1961
Rode and Lieberman 2004
Rhynchonellata - Spiriferida - Mucrospiriferidae
Tylothyris mesacostalis (Hall 1867)
Rode and Lieberman 2004
Rhynchonellata - Spiriferida - Theodossiidae
Theodossia hungerfordi
156 specimens
30.2%
Rhynchonellata - Spiriferida - Spinocyrtiidae
Spinocyrtia macbridei
Rode and Lieberman 2004 2 specimens
Rhynchonellata - Spiriferida - Cyrtospiriferidae
Cyrtospirifer whitneyi
45 specimens
8.72%
Tenticospirifer cyrtinaeformis
2 specimens
0.4%
Rhynchonellata - Atrypida - Atrypidae
Atrypa devoniana Webster 1921
139 specimens
26.9%
    = Pseudatrypa devoniana Webster 1921
Rode and Lieberman 2004
misspelling Pseudoatrypa devoniana
Atrypa rockfordensis
21 specimens
4.1%
    = Spinatrypa rockfordensis
Rode and Lieberman 2004
Rhynchonellata - Orthida - Schizophoriidae
Schizophoria iowaensis (Hall 1858)
57 specimens
recombined as Schizophoria (Schizophoria) iowensis
11%
Strophomenata - Strophomenida - Douvillinidae
Douvillina variabilis
63 specimens
12.2%
Douvillina arcuata (Hall 1858)
15 specimens
2.9%
Strophomenata - Strophomenida - Strophonellidae
Strophonella sp. Hall 1879
5 specimens
1.0%
Strophomenata - Strophomenida - Leptodontellidae
Sulcatostrophia sp.
2 specimens
0.4%
Strophomenata - Strophomenida - Strophodontidae
Strophodonta thomasi
2 specimens
corrected as Strophomena (Strophodonta)
0.4%: originally entered as "Stropheodonta thomasi"
Strophodonta biplacata
Rode and Lieberman 2004
corrected as Strophomena (Strophodonta)
Strophomenata - Productida - Productellidae
Productella thomasi Stainbrook 1945
Rode and Lieberman 2004
Productella rugatula Stainbrook 1945
Rode and Lieberman 2004
Strophomenata - Productida - Monticuliferidae
Devonoproductus walcotti
12 specimens
2.3%
Strophomenata - Orthotetida - Schuchertellidae
Schuchertella parva
1 specimen
0.2%
Stenolaemata - Trepostomata - Heterotrypidae
Leioclema occidens
4 specimens
0.8%: originally entered as "Lioclema occidens"
Stenolaemata - Trepostomida - Amplexoporidae
Petalotrypa formosa
5 specimens
0.96%
Stenolaemata - Cryptostomata - Fenestellidae
Fenestella sp. Lonsdale 1839
1 specimen
0.2%
unclassified
Metazoa indet. Haeckel 1874
4 specimens
synonym of Animalia
0.8%: "worm tubes"
Anthozoa - Stauriida - Zaphrentidae
Heliophyllum solidum (Hall and Whitfield 1873)
13 specimens
2.5%
Anthozoa - Stauriida - Phillipsastreidae
Pachyphyllum woodmani Hall and Whitfield 1864
2 specimens
0.4%
see common names

Geography
Country:United States State/province:Iowa County:Floyd
Coordinates: 43.1° North, 93.0° West (view map)
Paleocoordinates:29.2° South, 37.6° West
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Devonian Epoch:Late/Upper Devonian
Stage:Frasnian 10 m.y. bin:Devonian 4
*Period:Late/Upper Devonian
Key time interval:Frasnian
Age range of interval:382.70000 - 372.20000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Lime Creek Member:Cerro Gordo
Stratigraphic resolution:group of beds
Stratigraphy comments: several beds in the middle of the member
Lithology and environment
Primary lithology: calcareous "shale"
Environment:marine indet.
Geology comments: paleoenvironment not discussed
Taphonomy
Modes of preservation:body
Collection methods and comments
Collection methods:field collection
Reason for describing collection:paleoecologic analysis
Collection method comments: field collection of Ager
Taxonomic list comments:total number of specimens 516
Metadata
Database number:3403
Authorizer:J. Alroy, P. Wagner, A. Stigall Enterer:J. Alroy, A. Stigall, P. Wagner
Modifier:C. Visaggi Research group:marine invertebrate
Created:1999-07-31 17:58:15 Last modified:2004-03-11 16:25:08
Access level:the public Released:2000-11-20 13:53:19
Creative Commons license:CC BY
Reference information

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

Secondary references:

14402 A. L. Rode and B. S. Lieberman. 2004. Using GIS to unlock the interactions between biogeography, environment, and evolution in middle and Late Devonian brachiopods and bivalves. Palaeogeography, Palaeoclimatology, Palaeoecology 211(3-4):345-359 [A. Stigall/A. Stigall/A. Stigall]
9042 P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner]