F-231: Maysvillian - Richmondian, Minnesota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Cornites sp.
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Scyphozoa
- Conulariida
- Conulariidae
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Conularia sp.
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Pterobranchia
- Graptoloidea
- Diplograptidae
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Orthograptus sp.
Lapworth 1873
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Crinoidea
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Crinoidea indet.
Miller 1821
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| crinoids | ||||||||||
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Monoplacophora
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Monoplacophora indet.
Knight 1952
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9 specimens | |||||||||
| Tergomya, ? Cyrtonellida | ||||||||||
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Gastropoda
- Murchisoniina
- Eotomariidae
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? Liospira sp.
Ulrich and Scofield 1897
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33 specimens | |||||||||
| gastropods; Archaeogastropoda - originally entered as "? Liospira sp." | ||||||||||
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Bivalvia
- Solemyida
- Ctenodontidae
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Ctenodonta similis
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552 specimens | |||||||||
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Bivalvia
- Modiomorphida
- Modiomorphidae
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Orthodesma caniculatum
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53 specimens | |||||||||
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Bivalvia
- Pterioida
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Pterioida indet.
Newell 1965
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26 specimens | |||||||||
| ? Ambonychia; unid'd bivalves | ||||||||||
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Bivalvia
- Myalinida
- Ambonychiidae
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Byssonychia tenuis
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116 specimens | |||||||||
| synonym of Ambonychia | ||||||||||
| originally entered as "Byssonichia tenuis" | ||||||||||
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Bivalvia
- Ostreida
- Pterineidae
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Pterinea sp.
Goldfuss 1832
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20 specimens | |||||||||
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Cephalopoda
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? Nautiloidea indet.
Agassiz 1847
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29 specimens | |||||||||
| cephalopods - originally entered as "? Nautiloidea indet." | ||||||||||
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Strophomenata
- Strophomenida
- Sowerbyellidae
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Thaerodonta saxea
(Sardeson 1892)
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1226 specimens | |||||||||
| synonym of Thaerodonta recedens | ||||||||||
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Strophomenata
- Strophomenida
- Strophomenidae
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Strophomena sp.
Rafinesque and De Blainville 1824
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94 specimens | |||||||||
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Rhynchonellata
- Orthida
- Plaesiomyidae
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Plaesiomys subquadrata
(Hall 1847)
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15 specimens | |||||||||
| recombined as Plaesiomys subquadratus | ||||||||||
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Rhynchonellata
- Orthida
- Dalmanellidae
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Onniella quadrata
Wang 1949
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719 specimens | |||||||||
| recombined as Paucicrura quadrata | ||||||||||
| originally entered as "Oniella quadrata" | ||||||||||
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Rhynchonellata
- Rhynchonellida
- Rhynchotrematidae
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Lepidocyclus laddi
Wang 1949
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5 specimens | |||||||||
| originally entered as "Lepidocyclas laddi" | ||||||||||
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Stenolaemata
- Cryptostomata
- Rhinidictyidae
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Stictopora sp.
Hall 1847
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| these 3 bryoz's add upp to 6 specimens | ||||||||||
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Stenolaemata
- Trepostomata
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Trepostomata indet.
Ulrich 1882
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| encrusting trepostome, these 3 bryoz's add upp to 6 specimens | ||||||||||
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Stenolaemata
- Trepostomata
- Halloporidae
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Hallopora sp.
Bassler 1911
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| these 3 bryoz's add upp to 6 specimens | ||||||||||
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Trilobita
- Asaphida
- Asaphidae
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Isotelus sp.
Dekay 1824
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190 specimens | |||||||||
| originally entered as "Isotellus sp." | ||||||||||
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Trilobita
- Phacopida
- Pterygometopidae
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Pterygometopus sp.
Schmidt 1881
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9 specimens | |||||||||
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Ostracoda
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Ostracoda indet.
Latreille 1802
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| ostracodes | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Minnesota | County: | Fillmore |
| Coordinates: | 43.5° North, 91.8° West (view map) | ||||
| Paleocoordinates: | 19.0° South, 60.1° West | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician | Epoch: | Late/Upper Ordovician |
| Stage: | Katian | 10 m.y. bin: | Ordovician 5 |
| *Period: | Late/Upper Ordovician | *Epoch: | Ashgill | *Local age/stage: | ? Richmondian |
| Key time interval: | Maysvillian - Richmondian | Graptolite zone: | Amplexograptus manitoulinensis |
| Age range of interval: | 450.40000 - 446.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
Lithology and environment
| Primary lithology: | lithified cherty/siliceous "limestone" | ||
| Secondary lithology: | gray silty,cherty/siliceous dolomite | ||
| Lithology description: Lithosome II (Elgin Member) Limestones, sublithographic, in 1- to 2-inch beds, cherty, fossiliferous, alternating with shaly, cherty gray dolomite in 3- to 5-inch beds; limestone beds contain the Thaerodonta-Onniella community-48-55 | |||
| Environment: | shallow subtidal indet. | Tectonic setting: | cratonic basin |
| Geology comments: "biomicrite alternating with unfossiliferous shale. (shaly dolos and siliceous sh[illeg.] beds. shallow water (prob deeper than Parker's Maquoketa). stable craton, interior. BA4" | |||
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
| Taxonomic list comments:"T. N. Bayer, 1967. Repetitive benthonic community in the Maquoketa Fm. (Ord.) of MN" J. Paleo. 41:417-422" | |
Metadata
| Also known as: | Thaerodonta-Oniella community, Maquoketa Fm. | ||
| Database number: | 357 | ||
| Authorizer: | J. Sepkoski | Enterer: | M. Sommers |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 1998-11-20 10:07:18 | Last modified: | 2018-03-14 17:13:01 |
| Access level: | the public | Released: | 1998-11-20 10:07:18 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 17051. | T. N. Bayer. 1967. Repetitive benthonic community in the Maquoketa Fm. (Ordovician) of Minnesota. Journal of Paleontology 41(2):417-422 [P. Wagner/P. Wagner/P. Wagner] |
Secondary references:
| 13 | J. J. Sepkoski. 1998. Rates of speciation in the fossil record. Philosophical Transaction of the Royal Society Biological Sciences 353(1366):315-326 [J. Sepkoski/M. Sommers/M. Uhen] |