Brockocystis-Anartiocystis Association of the Brassfield: Llandovery, Indiana
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Crinoidea
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Crinoidea indet.
Miller 1821
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Crinoidea
- Calceocrinida
- Calceocrinidae
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Calceocrinus sp.
Hall 1852
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Rhombifera
- Callocystitidae
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Brockocystis nodosaria
Foerste 1919
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Anartiocystis sp.
Ausich and Schumacher 1984
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Cyclocystoidea
- Cyclocystoididae
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Sievertsia sp.
Smith and Paul 1982
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| Sievertsia sp. nov. (plates) | ||||||||||
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unclassified
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Brachiopoda indet.
Cuvier 1805
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Strophomenata
- Orthotetida
- Chilidiopsidae
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Coolinia sp.
Bancroft 1949
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| spelled with current rank as Fardenia (Coolinia) | ||||||||||
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Strophomenata
- Strophomenida
- Sowerbyellidae
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Eoplectodonta prolongatus
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Eoplectodonta transversalis
(Wahlenberg 1818)
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| recombined as Eoplectodonta (Eoplectodonta) transversalis | ||||||||||
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Strophomenata
- Strophomenida
- Leptestiidae
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Leangella sp.
Opik 1933
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Strophomenata
- Strophomenida
- Leptostrophiidae
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Protomegastrophia sp.
Caster 1939
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Leptaena cf. rhomboidalis
(Wahlenberg 1818)
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| recombined as Leptaena (Leptaena) rhomboidalis | ||||||||||
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Rhynchonellata
- Atrypida
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Protatrypa marginalis
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Rhynchonellata
- Rhynchonellida
- Camarotoechiidae
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? Rhynchonella scobina
(Meek 1872)
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| synonym of Camarotoechia neglecta | ||||||||||
| 'Rhynchonella' scobina | ||||||||||
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Rhynchonellata
- Orthida
- Rhipidomellidae
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Dalejina euorthis
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Dalejina cf. hybrida
(Sowerby 1839)
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Rhynchonellata
- Orthida
- Dalmanellidae
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Resserella cf. elegantula
(Dalman 1828)
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Rhynchonellata
- Orthida
- Orthidae
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Platystrophia reversata
Foerste 1885
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| recombined as Orthis biforata reversata | ||||||||||
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Rhynchonellata
- Orthida
- Hesperorthidae
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Dolerorthis spp.
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Rhynchonellata
- Orthida
- Platystrophiidae
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Platystrophia daytonensis
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unclassified
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Bryozoa indet.
Ehrenberg 1831
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Gastropoda
- Bellerophontida
- Tropidodiscidae
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Cyrtolites youngi
Foerste 1889
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| recombined as Zonidiscus youngi | ||||||||||
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Gastropoda
- Murchisoniina
- Murchisoniidae
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Hormotoma subulata
(Conrad 1842)
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| original and current combination Murchisonia subulata | ||||||||||
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Gastropoda
- Euomphalina
- Platyceratidae
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Platyostoma daytonense
(Foerste 1923)
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Platyostoma clintonensis
(Foerste 1909)
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| recombined as Platyostoma cliftonensis | ||||||||||
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Cyclonema daytonensis
Foerste 1899
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Cyclonema gyronemoides
Foerste 1923
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Trilobita
- Corynexochida
- Illaenidae
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Illaenus sp.
Dalman 1827
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Trilobita
- Proetida
- Otarionidae
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Otarion sp.
Zenker 1833
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Anthozoa
- Rugosa
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Rugosa indet.
Milne-Edwards and Haime 1850
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Anthozoa
- Favositida
- Favositidae
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Favosites sp.
Lamarck 1816
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Anthozoa
- Heliolitida
- Halysitidae
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Halysites sp.
von Waldheim 1813
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Heteractinida
- Octactinellida
- Astraeospongiidae
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Astraeospongium sp.
(Roemer 1860)
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Indiana | County: | Decatur County |
| Coordinates: | 39.3° North, 85.5° West (view map) | ||||
| Paleocoordinates: | 24.9° South, 54.8° West | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Silurian | Epoch: | Llandovery |
| 10 m.y. bin: | Silurian 1 | ||
| *Period: | Early/Lower Silurian | *Epoch: | Late/Upper Llandovery - Middle Llandovery |
| Key time interval: | Llandovery | ||
| Age range of interval: | 443.80000 - 433.40000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Brassfield | ||||
| Stratigraphy comments: Lower-middle Brassfield, i.e., below Lee Creek Member (Nicoll & Rexroad, 1968) at type locality and elsewhere in southeast Indiana, but above the Belfast Member (Rexroad, 1967) of Ohio and Kentucky, southeast Indiana: middle thin-bedded unit of Gordon & Ettensohn (1984), southwestern Ohio and adjacent Kentucky. |
Lithology and environment
| Primary lithology: | lithified "shale" |
| Secondary lithology: | lithified dolomite |
| Includes fossils? | Y |
| Includes fossils? | Y |
| Lithology description: Occurs in thin shales to mudstones and interbedded shales and thin dolostones with packstone to grainstone textures. | |
| Environment: | deep subtidal indet. |
| Geology comments: SEP environmental call based on given information and knowledge of regional geology | |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
Metadata
| Database number: | 13291 | ||
| Authorizer: | M. Foote | Enterer: | K. Koverman |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2002-02-15 11:17:14 | Last modified: | 2006-09-15 15:14:05 |
| Access level: | the public | Released: | 2002-02-15 11:17:14 |
| 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] |