Inexact locality near Crawfordsville, unknown formation, Montgomery Co., Indiana: Chadian - Arundian, Indiana
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Blastoidea
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Blastoidea indet.
Say 1825
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| a blastoid | ||||||||||
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Crinoidea
- Monobathrida
- Batocrinidae
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Abatocrinus grandis
(Lyon and Casseday 1859)
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Dizygocrinus indianaensis
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Crinoidea
- Diplobathrida
- Rhodocrinitidae
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Gilbertsocrinus tuberosus
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Crinoidea
- Dendrocrinida
- Staphylocrinidae
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Abrotocrinus unicus
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Crinoidea
- Dendrocrinida
- Scytalocrinidae
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Scytalocrinus cf. disparilis
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| originally entered as "Scytalocrinus cf. disparilis" | ||||||||||
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Histocrinus coreyi
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Crinoidea
- Poteriocrinina
- Decadocrinidae
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Decadocrinus depressus
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Crinoidea
- Taxocrinida
- Taxocrinidae
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Taxocrinus colletti
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Echinoidea
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Echinoidea indet.
(Leske 1778)
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| an echinoid | ||||||||||
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Asteroidea
- Hadrosida
- Palaeasteridae
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Neopalaeaster crawfordsvillensis
(Miller 1880)
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1 specimen | |||||||||
| Type specimen | ||||||||||
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Asteroidea
- Cryptozonia
- Schoenasteridae
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Schoenaster fimbriatus
(Meek and Worthen 1860)
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Ophiuroidea
- Phrynophiurida
- Onychasteridae
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Onychaster flexilis
Meek and Worthen 1868
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Ophiuroidea
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Lumectaster howelli
Jell 1997
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Ophiuroidea
- Ophiurida
- Aganasteridae
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Aganaster gregarius
(Meek and Worthen 1869)
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Ophiuroidea
- Cheiropterasteridae
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Vandelooaster plicatilis
Jell 1997
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Ophiuroidea
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Calyptactis demissus
(Miller 1891)
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Stenolaemata
- Cryptostomata
- Fenestellidae
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Fenestellidae indet.
King 1850
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| almost ubiquitous fenestellid bryozoans | ||||||||||
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unclassified
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Brachiopoda indet.
Cuvier 1805
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| occasional brachiopods | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Indiana | County: | Montgomery |
| Coordinates: | 40.0° North, 86.9° West (view map) | ||||
| Paleocoordinates: | 17.2° South, 32.6° West | ||||
| Basis of coordinate: | based on nearby landmark |
Stratigraphy
| Stratigraphy comments: "Bed of origin" not known. JA: the Crawfordsville beds are late Osagean = Chadian or Arundian, see for example Lane et al. 1973 |
Lithology and environment
| Environment: | reef, buildup or bioherm |
| Geology comments: "The environment high on the Borden delta platform (Borden Group)...was extremely quiet water on a carbonate bank with inflow of silt-sized clastics. The echinoderms were localized around bioherms with intervening silt substrates usually unpopulated." | |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Collection was made in 1867 by Christian van de Loo for James Hall. | |
Metadata
| Database number: | 699 | ||
| Authorizer: | J. Alroy | Enterer: | M. Sommers |
| Modifier: | J. Alroy | Research group: | marine invertebrate |
| Created: | 1999-02-25 10:51:32 | Last modified: | 2007-06-07 22:04:28 |
| Access level: | the public | Released: | 1999-02-25 10:51:32 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 20. | P. Jell. 1997. Early Carboniferous ophiuroids from Crawfordsville, Indiana. Journal of Paleontology 71(2):306-316 [J. Alroy/M. Sommers/J. Alroy] |