Little Brazos River, TX; upstream from rt 21 bridge: Bartonian, Texas
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Eodrilla texana
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166 individuals | |||||||||
| originally entered as "Eodrillia texana" | ||||||||||
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Otostomia melanella
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3 individuals | |||||||||
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Otostomia trapaquara
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1 individual | |||||||||
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Anthozoa
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Anthozoa indet.
Ehrenberg 1834
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178 individuals | |||||||||
| coral C | ||||||||||
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Anthozoa
- Scleractinia
- Fungiidae
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Discotrochus orbignianus
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34 individuals | |||||||||
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Anthozoa
- Scleractinia
- Dendrophylliidae
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Endopachys maclurii
(Lea 1833)
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218 individuals | |||||||||
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Anthozoa
- Scleractinia
- Turbinoliidae
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Turbinolia pharetra
Lea 1833
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524 individuals | |||||||||
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Hexactinellida
- Innaecoeliida
- Craticulariidae
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Pleurostoma adolescens
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325 individuals | |||||||||
| originally entered as "Pleurotoma adolescens" | ||||||||||
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Gymnolaemata
- Cheilostomata
- Lunulitidae
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Lunulitidae indet.
Lagaaij 1952
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4 individuals | |||||||||
| lunulitid A | ||||||||||
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Scaphopoda
- Gadilida
- Gadilidae
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Cadulus sp.
Philippi 1844
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152 individuals | |||||||||
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Gastropoda
- Opisthobranchia
- Retusidae
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Retusa galba
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47 individuals | |||||||||
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Gastropoda
- Heterostropha
- Architectonicidae
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Architectonica elaborata
Conrad 1833
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5 individuals | |||||||||
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Architectonica meekana
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156 individuals | |||||||||
| A. m. splendida | ||||||||||
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Architectonica amoena
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17 individuals | |||||||||
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Gastropoda
- Heterostropha
- Pyramidellidae
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Pyramidella bastropensis
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2 individuals | |||||||||
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Gastropoda
- Heterostropha
- Mathildidae
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Gegania antiquata
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1 individual | |||||||||
| G. a. striata | ||||||||||
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Gastropoda
- Eulimidae
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Eulima extremis
Aldrich 1911
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4 individuals | |||||||||
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Gastropoda
- Turritellidae
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Mesalia claibornensis
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36 individuals | |||||||||
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Gastropoda
- Naticidae
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Naticidae indet.
Guilding 1834
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5365 individuals | |||||||||
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Gastropoda
- Vitrinellidae
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Cyclostremiscus exacuus
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15 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Costellariidae
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Pyramimitra terebraeformis
(Conrad 1848)
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17 individuals | |||||||||
| original and current combination Mitra terebraeformis | ||||||||||
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Conomitra texana
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820 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Mitridae
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Fusimitra polita
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7 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Buccinidae
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Buccitriton texanum
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15400 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Melongenidae
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Levifusus mortoniopsis
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4 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Fasciolariidae
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Latirus moorei
Gabb 1860
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21 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Cancellariidae
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Trigonostoma babylonicum
Lea 1833
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1 individual | |||||||||
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Trigonostoma gemmatum
Conrad 1833
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3 individuals | |||||||||
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Bonellitia sp.
Jousseaume 1887
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86 individuals | |||||||||
| spp A | ||||||||||
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Gastropoda
- Neogastropoda
- Turridae
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Eucheilodon reticulata
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43 individuals | |||||||||
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Michela trabeatoides
Harris 1895
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8 individuals | |||||||||
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Eopleurotoma lisboncola
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212 individuals | |||||||||
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Protosurcula gabbi
Conrad 1865
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127 individuals | |||||||||
| corrected as Protosurcula gabbii | ||||||||||
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Trypanotopsis texana
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21 individuals | |||||||||
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Surculoma falsabenes
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1 individual | |||||||||
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Gastropoda
- Neogastropoda
- Conidae
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Glyptotoma conradiana
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3 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Cochlespiridae
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Tropisurcula ? crenula
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2 individuals | |||||||||
| originally entered as "Tropisurcula crenula?" | ||||||||||
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Gastropoda
- Neogastropoda
- Terebridae
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Hastula venusta
Lea 1833
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6 individuals | |||||||||
| originally entered as "Hastula" venusta" | ||||||||||
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Gastropoda
- Neogastropoda
- Borsoniidae
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Microdrillia sp.
Casey 1903
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77 individuals | |||||||||
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Gastropoda
- Neogastropoda
- Volutidae
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Athleta petrosus
(Conrad 1833)
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41 individuals | |||||||||
| recombined as Athleta petrosa | ||||||||||
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Bullata semen
Lea 1833
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1 individual | |||||||||
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Gastropoda
- Strombidae
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Ectinochilus laqueatus
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21 individuals | |||||||||
| synonym of Rimella | ||||||||||
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Gastropoda
- Ranellidae
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Distorsio septemdentata
()
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63 individuals | |||||||||
| original and current combination Distorsio septendentata | ||||||||||
| originally entered as "Distortio septemdentata" | ||||||||||
| see common names | ||||||||||
Geography
| Country: | United States | State/province: | Texas |
| Coordinates: | 30.7° North, 96.4° West (view map) | ||
| Paleocoordinates: | 31.9° North, 87.7° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | small collection |
Time
| Period: | Paleogene | Epoch: | Eocene |
| Stage: | Bartonian | 10 m.y. bin: | Cenozoic 3 |
| *Period: | Tertiary | *Local age/stage: | Claibornian |
| Key time interval: | Bartonian | ||
| Age range of interval: | 41.20000 - 37.71000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Lithology and environment
| Primary lithology: | grading,glauconitic unlithified silty "shale" | ||
| Environment: | offshore | Tectonic setting: | passive margin |
| Geology comments: sample from thin, graded storm bed above storm wave base | |||
Taphonomy
| Modes of preservation: | body,original aragonite,original calcite |
| Size of fossils: | mesofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | bulk,mechanical,sieve,field collection |
| Reason for describing collection: | paleoecologic analysis |
| Taxonomic list comments:includes all countable macrofossils but bivalves, does include oysters | |
Metadata
| Also known as: | Brazos | ||
| Database number: | 2452 | ||
| Authorizer: | L. Ivany | Enterer: | L. Ivany |
| Modifier: | J. Sessa | Research group: | GCP,marine invertebrate |
| Created: | 1999-07-05 08:55:46 | Last modified: | 2010-08-10 14:16:33 |
| Access level: | the public | Released: | 1999-07-05 08:55:46 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 72. | L. C. Ivany. 1997. Faunal stability and environmental change in the middle Eocene Gulf Coastal Plain (PhD Thesis, Harvard University). 1-221 [L. Ivany/L. Ivany/A. Clement] |