Hedeina-Gypidulid Community, upper Scotch Grove Fm., eastern Iowa: Wenlock, Iowa

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Protometgastrophia sp.
Cyathocrintes cf. striatissimus
"Cyathocrinites (R.) striatissimus"
Anthozoa
Tabulata indet. (Milne-Edwards and Haime 1850)
Anthozoa - Favositida - Alveolitidae
Alveolitidae indet. Duncan 1872
Anthozoa - Favositida - Favositidae
Favositidae indet. Dana 1846
Anthozoa - Auloporida - Syringoporidae
Syringopora sp. Goldfuss 1826
Anthozoa - Heliolitida - Halysitidae
Halysites sp. von Waldheim 1813
Anthozoa - Heliolitida - Heliolitidae
Heliolites sp. Dana 1846
Anthozoa - Rugosa
Rugosa indet. Milne-Edwards and Haime 1850
small cylindrical solitary rugosan
Anthozoa - Cystiphyllida - Cystiphyllidae
Cystiphyllidae indet. Milne-Edwards and Haime 1850
Anthozoa - Cystiphyllida - Tryplasmatidae
Porpites sp. Schlotheim 1820
Anthozoa - Stauriida - Streptelasmatidae
Streptelasmatidae indet. (Nicholson 1889)
Streptelasmidae
Anthozoa - Stauriida - Arachnophyllidae
Arachnophyllum sp. Dana 1846
Rhombifera - Callocystitidae
Hallicystis sp. Jaekel 1899
Blastoidea
Lysocystites sp.
Crinoidea
Crinoidea indet. Miller 1821
Crinoidea - Pisocrinida - Pisocrinidae
Pisocrinus sp. de Koninck 1858
Crinoidea - Myelodactylida - Myelodactylidae
Myelodactylus sp. Hall 1852
Crinoidea - Diplobathrida - Dimerocrinitidae
Dimerocrinites (Dimerocrinites) sp. Phillips 1839
Crinoidea - Monobathrida - Marsupiocrinidae
Marsupiocrinidae indet. Bronn 1855
Manticrinus sp. Ausich 1986
Crinoidea - Monobathrida - Eucalyptocrinitidae
Eucalyptocrinites sp. Goldfuss 1831
Crinoidea - Monobathrida - Carpocrinidae
? Carpocrinus sp. Muller 1840
Crinoidea - Monobathrida
Platycrinitacea indet. Austin and Austin 1843
Crinoidea - Monobathrida - Hapalocrinidae
? Lyonicrinus sp. Springer 1926
Stenolaemata - Cryptostomata
Cryptostomata indet. Vine 1884
branching forms
Stenolaemata - Cryptostomata - Fenestellidae
Fenestellidae indet. King 1850
Stenolaemata - Trepostomata
Trepostomata indet. Ulrich 1882
crustose forms
unclassified
Brachiopoda indet. Cuvier 1805
Rhynchonellata - Spiriferida
Spiriferida indet. Waagen 1883
Rhynchonellata - Spiriferida - Delthyrididae
? Delthyris sp. Dalman 1828
Rhynchonellata - Spiriferida
Cyrtiacea indet. Frederiks 1919
replaced by Cyrtioidea
Rhynchonellata - Spiriferida - Cyrtiidae
Hedeina sp. Boucot 1957
Cyrtia sp. Dalman 1828
Rhynchonellata - Athyridida - Anoplothecidae
? Coelospira sp. Hall 1863
Rhynchonellata - Athyridida - Meristellidae
Whitfieldella sp. Hall and Clarke 1893
Meristina sp. Hall 1867
Rhynchonellata - Atrypida - Atrypidae
Plectatrypa sp. Schuchert and Cooper 1930
Atrypa sp. Dalman 1828
Rhynchonellata - Orthida
Orthida indet. Schuchert and Cooper 1932
indet. orthid A
Rhynchonellata - Orthida - Dalmanellidae
Dalmanellidae indet. Schuchert 1913
Isorthis sp. Kozlowski 1929
Resserella sp. Bancroft 1928
Rhynchonellata - Orthida - Rhipidomellidae
Dalejina spp.
Rhynchonellata - Pentamerida - Gypidulidae
Gypidulidae indet. Schuchert and Le Vene 1929
Gypidula sp. Hall 1867
smooth
Rhynchonellata - Pentamerida - Camerellidae
Camerella sp. Billings 1859
Rhynchonellata - Rhynchonellida
Rhynchonellida indet. Kuhn 1949
Rhynchonellata - Rhynchonellida - Trigonirhynchiidae
Rhynchotreta sp. Hall 1879
Rhynchonellata - Rhynchonellida - Machaerariidae
Ferganella sp. Nikiforova 1937
Strophomenata - Strophomenida - Stropheodontidae
Stropheodontidae indet. Caster 1939
Strophomenata - Strophomenida - Sowerbyellidae
Eoplectodonta sp. Kozlowski 1929
Strophomenata - Strophomenida - Furcitellidae
Pentlandina sp. Bancroft 1949
Strophomenata - Strophomenida - Leptostrophiidae
? Leptostrophia sp. Hall and Clarke 1892
genus name in quotes
Strophomenata - Strophomenida - Rafinesquinidae
Leptaena sp. Dalman 1828
aff. Lepidoleptaena sp. Havlicek 1963
leptaenid aff. Lepidoleptaena
Leptaenidae indet. Hall and Clarke 1894
replaced by Leptaeninae
Strophomenata - Orthotetida - Chilidiopsidae
Coolinia sp. Bancroft 1949
spelled with current rank as Fardenia (Coolinia)
name corrected from "Coolina"
Strophomenata - Orthotetida - Triplesiidae
Streptis sp. Davidson 1881
Chileata - Dictyonellida - Eichwaldiidae
Dictyonella sp. Hall 1868
replaced by Eodictyonella
Craniata - Craniida - Craniidae
Craniidae indet. Menke 1828
Bivalvia
Pelecypoda indet. Goldfuss 1820
synonym of Bivalvia
Bivalvia - Ostreida - Pterineidae
? Actinopteria sp. Hall 1884
Cephalopoda - Orthocerida - Dawsonoceratidae
Dawsonoceras sp. Hyatt 1884
Gastropoda
Gastropoda indet. Cuvier 1795
Gastropoda - Euomphalina - Platyceratidae
Platyostoma sp. Conrad 1842
Platyceras sp. Conrad 1840
Gastropoda - Euomphalina - Oriostomatidae
Oriostoma sp. Munier-Chalmas 1876
Gastropoda - Euomphalina - Holopeidae
Raphistomina sp. Ulrich and Scofield 1897
Gastropoda - Euomphalina - Euomphalidae
? Poleumita sp. Clarke and Ruedemann 1903
Gastropoda - Murchisoniina - Phanerotrematidae
? Phanerotrema sp. Fischer 1885
Trilobita
Trilobita indet. Walch 1771
Trilobita - Corynexochida - Illaenidae
Illaenidae indet. Hawle and Corda 1847
Bumastus sp. Murchison 1839
Trilobita - Phacopida - Dalmanitidae
Dalmanites sp. Barrande 1852
Trilobita - Phacopida - Calymenidae
Calymene sp. Brongniart 1822
Trilobita - Phacopida - Encrinuridae
Encrinuridae indet. Angelin 1854
Encrinurus sp. Emmrich 1844
Trilobita - Phacopida - Cheiruridae
Cheiruridae indet. Hawle and Corda 1847
Cheirurus sp. Beyrich 1845
Trilobita - Proetida - Proetidae
Proetus sp. Steininger 1831
see common names

Geography
Country:United States State/province:Iowa
Coordinates: 42.0° North, 91.0° West (view map)
Paleocoordinates:23.1° South, 53.5° West
Basis of coordinate:based on political unit
Geographic resolution:basin
Time
Period:Silurian Epoch:Wenlock
10 m.y. bin:Silurian 2
*Epoch:Middle Wenlock
Key time interval:Wenlock
Age range of interval:433.40000 - 427.40000 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Scotch Grove
Stratigraphic resolution:formation
Stratigraphy comments: Apparently restricted in Iowa to units of mid-Wenlockian age. Waubeek and upper Buck Creek Quarry Members of the upper Scotch Grove Formation.
Lithology and environment
Primary lithology:dolomitic,shelly/skeletal wackestone
Secondary lithology:dolomitic,shelly/skeletal lime mudstone
Includes fossils?Y
Includes fossils?Y
Lithology description: "..dolomitized skeletal wackestones and mudstones"
Environment:deep subtidal ramp Tectonic setting:cratonic basin
Glacial or sequence phase:highstand systems tract
Geology comments: "...intermound facies..deeper than coeval mounds which are BA 3...[fauna and relations with adjacent communities suggest BA3 or transitional BA3-4]...skeletal grains unabraded, evidence for winnowing of mud absent, brachiopod valves commonly articulated...articulated crinoid cups...quiet environments generally below normal wave base; evidence for storm currents not found, suggesting deeper (or quieter) conditions than most Iowa BA 3 communities...tentatively assigned outer BA 3 to inner BA 4."

SEP environmental call based on given description and same vol. page 807.
Taphonomy
Collection methods and comments
Reason for describing collection:paleoecologic analysis
Collection method comments: See Frest et al. (1999--PBDB ref. 4379) for echinoderms of Dimerocrinites-Hedeina Community. I have combined two lists with abundances in table 50.6, as well as additional taxa mentioned in text.
Metadata
Database number:25019
Authorizer:M. Foote Enterer:M. Foote
Modifier:M. Foote Research group:marine invertebrate
Created:2002-08-26 08:23:53 Last modified:2006-09-15 15:14:05
Access level:the public Released:2002-08-26 08:23:53
Creative Commons license:CC BY
Reference information

Primary reference:
7006. B. J. Witzke and M. E. Johnson. 1999. Silurian brachiopod and related benthic communities from carbonate platform and mound environments of Iowa and surrounding areas. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 806-840 [M. Foote/M. Foote/M. Foote]