Diamphidiocystis-Bucanopsis Community Of the Brainard Formation: Richmondian, Iowa
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Simulodonta cf. obliqua
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Tentaculita
- Cornulitida
- Cornulitidae
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Cornulites sp.
Schlotheim 1820
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Cephalopoda
- Oncocerida
- Oncoceratidae
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? Beloitoceras discrepana
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Cephalopoda
- Orthocerida
- Proteoceratidae
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Isorthoceras sp.
Flower 1962
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Gastropoda
- Bellerophontida
- Bellerophontidae
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Bucanopsis sp.
Ulrich and Scofield 1897
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Gastropoda
- Murchisoniina
- Lophospiridae
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Loxoplocus sp.
Fischer 1885
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| Loxoplocus (Lophospira) sp. | ||||||||||
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= Lophospiridae indet.
Wenz 1938
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Lenz 1977 | |||||||||
| Lophospira, Eunema or Paupospira | ||||||||||
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Gastropoda
- Murchisoniina
- Murchisoniidae
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Murchisonia sp.
d'Archiac and de Verneuil 1841
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| Muchisonia (Hormotoma) sp. | ||||||||||
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= Murchisonia (Hormotoma) sp.
d'Archiac and de Verneuil 1841
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Wagner 2023 | |||||||||
| original and current combination Murchisonia | ||||||||||
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Gastropoda
- Murchisoniina
- Eotomariidae
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Liospira cf. spicula
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Tergomya
- Cyrtonellida
- Cyrtolitidae
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Cyrtolites sp.
Conrad 1838
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Bivalvia
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Bivalvia indet.
Linnaeus 1758
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Bivalvia
- Nuculanida
- Cucullellidae
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Nuculites cf. neglectus
(Hall 1862)
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Bivalvia
- Nuculanida
- Malletiidae
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Arisaigia sp.
McLearn 1918
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Palaeoneilo fecunda
(Hall 1862)
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Palaeoneilo cf. fecunda
(Hall 1862)
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Bivalvia
- Solemyida
- Ctenodontidae
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Ctenodonta anatina
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Ctenodonta sp.
Salter 1852
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unclassified
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Brachiopoda indet.
Cuvier 1805
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Rhynchonellata
- Orthida
- Glyptorthidae
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Glyptorthis sp.
Foerste 1914
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Rhynchonellata
- Atrypida
- Anazygidae
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Zygospira cf. resupinata
Wang 1949
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Lingulata
- Lingulida
- Discinidae
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Orbiculoidea sp.
d'Orbigny 1847
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unclassified
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Bryozoa indet.
Ehrenberg 1831
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Stylophora
- Mitrata
- Anomalocystitidae
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Enoploura wetherbyi
Caster 1952
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| synonym of Enoploura balanoides | ||||||||||
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Stylophora
- Mitrata
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Diamphidiocystis sp.
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Edrioasteroidea
- Pyrgocystidae
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Pyrgocystis sp.
Bather 1915
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Crinoidea
- Cupulocrinidae
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Cupulocrinus sp.
d'Orbigny 1849
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| Cupulocrinus sp. B, Kolata et al., 1987 | ||||||||||
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Crinoidea
- Dendrocrinida
- Dendrocrinidae
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Dendrocrinus sp.
Hall 1852
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Dendrocrinus aff. curvijunctus
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Crinoidea
- Plicodendrocrinidae
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Dendrocrinus casei
Meek 1871
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| recombined as Plicodendrocrinus casei | ||||||||||
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Crinoidea
- Diplobathrida
- Rhodocrinitidae
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Trichinocrinus sp.
Moore and Laudon 1943
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Crinoidea
- Monobathrida
- Tanaocrinidae
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Compsocrinus sp.
Wachsmuth and Springer 1885
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Rhombifera
- Callocystitidae
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Anartiocystis sp.
Ausich and Schumacher 1984
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Demospongiae
- Streptosclerophorida
- Hindiidae
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Hindia cf. parva
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Iowa | County: | Dubuque County |
| Coordinates: | 42.9° North, 91.7° West (view map) | ||||
| Paleocoordinates: | 19.4° South, 60.0° West | ||||
| Basis of coordinate: | based on political unit | ||||
| 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: | Richmondian | ||
| Age range of interval: | 449.80000 - 446.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
Lithology and environment
| Primary lithology: | pyritic,gray,green lithified silty "shale" |
| Secondary lithology: | dolomitic lithified wackestone |
| Includes fossils? | Y |
| Lithology description: Generally only sparsely fossiliferous, but some beds moderately so. The middle Brainard is a greenish gray to brownish silty shale with occasional dolomitic wackestone interbeds. Pyrite nodules are common, and the fauna is typically completely pyritezed. Crystal clusters and fibrous spherules of pyrite and rare selenite crystals are scattered through the unit. Biogenic reworking is evident in may beds, and bedding in general is indistinct. | |
| Environment: | offshore |
| Geology comments: The soft bottom and intact preservation of most echinoderms suggests very infrequent storm or wave disturbance and deposittion in a relatively offshore position. | |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 13204 | ||
| Authorizer: | M. Foote, P. Wagner | Enterer: | K. Koverman, P. Wagner |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2002-01-29 08:59:41 | Last modified: | 2006-09-15 15:14:05 |
| Access level: | the public | Released: | 2002-01-29 08:59:41 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 4379. | T. J. Frest, C. E. Brett, and B. J. Witzke. 1999. Caradocian-Gedinnian echinoderm associations of Central and Eastern North America. Paleocommunities--a case study from the Silurian and Lower Devonian 638-783 [M. Foote/K. Koverman/P. Wagner] |
Secondary references:
| 7341 | A. C. Lenz. 1977. Upper Silurian and Lower Devonian brachiopods of Royal Creek, Yukon Canada. Part 1. Orthoida, Strophomenida, Pentamerida, Rhynchonellida. Palaeontographica Abteilung A 159(1-3):37-109 [M. Foote/M. Foote/M. Foote] | |
| 9042 | P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner] |