Little Brazos River, TX; upstream from rt 21 bridge (Eocene of the United States)

Also known as Brazos

Where: Texas (30.7° N, 96.4° W)

• Paleocoordinates: 35.7° N, 79.6° W (Wright 2013)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Wheelock Member (Crockett Formation), Bartonian (41.3 - 38.0 Ma)

• bed-level stratigraphic resolution

Environment/lithology: offshore; unlithified, graded, glauconitic, silty shale

• sample from thin, graded storm bed

above storm wave base

Size class: mesofossils

Preservation: original aragonite, original calcite

Collection methods: bulk, mechanical, sieve,

Primary reference: 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]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 2452: authorized by Linda Ivany, entered by Linda Ivany on 05.07.1999

Creative Commons license: CC0 (CC0)

Taxonomic list

• includes all countable macrofossils but bivalves, does include oysters
Show authors, comments, and common names
Gastropoda
 Heterostropha - Architectonicidae
Architectonica meekana splendida
Architectonica meekana splendida sundial
A. m. splendida
unclassified
  -
Otostomia melanella, Otostomia trapaquara
Anthozoa
  -
Anthozoa indet.
Anthozoa indet. Ehrenberg 1834
coral C
 Scleractinia - Dendrophylliidae
Endopachys maclurii
Endopachys maclurii Lea 1833 stony coral
 Scleractinia - Fungiidae
Discotrochus orbignianus
 Scleractinia - Turbinoliidae
Turbinolia pharetra
Turbinolia pharetra Lea 1833 stony coral
Hexactinellida
 Innaecoeliida - Craticulariidae
Pleurostoma adolescens
Pleurostoma adolescens glass sponge
originally entered as "Pleurotoma adolescens"
Gymnolaemata
 Cheilostomata - Lunulitidae
Lunulitidae indet.
Lunulitidae indet. Lagaaij 1952
lunulitid A
Scaphopoda
 Gadilida - Gadilidae
Cadulus sp.
Cadulus sp. Philippi 1844 tusk shell
Gastropoda
 Heterostropha - Architectonicidae
Architectonica elaborata, Architectonica amoena
Architectonica elaborata Conrad 1833 sundial
 Heterostropha - Pyramidellidae
Pyramidella bastropensis
 Heterostropha - Mathildidae
Gegania antiquata striata
Gegania antiquata striata Lea 1833 snail
G. a. striata
 Opisthobranchiata - Retusidae
Retusa galba
 Sorbeoconcha - Strombidae
"Ectinochilus laqueatus" = Rimella
"Ectinochilus laqueatus" = Rimella true conch
 Neogastropoda - Buccinidae
Buccitriton texanum
 Neogastropoda - Fasciolariidae
Latirus moorei
Latirus moorei Gabb 1860 snail
 Neogastropoda - Melongenidae
Levifusus mortoniopsis
 Neogastropoda - Costellariidae
Pyramimitra terebraeformis, Conomitra texana
Pyramimitra terebraeformis Conrad 1848 ribbed mitre
Conomitra texana ribbed mitre
 Neogastropoda - Conidae
Glyptotoma conradiana
 Neogastropoda - Borsoniidae
Microdrillia sp.
Microdrillia sp. Casey 1903 snail
 Neogastropoda - Turridae
Eucheilodon reticulata, Eopleurotoma lisboncola, Michela trabeatoides, "Protosurcula gabbi" = Protosurcula gabbii, Surculoma falsabenes, Trypanotopsis texana
Michela trabeatoides Harris 1895 turrid
"Protosurcula gabbi" = Protosurcula gabbii Conrad 1865 turrid
 Neogastropoda - Terebridae
Hastula venusta
Hastula venusta Lea 1833 auger snail
originally entered as "Hastula" venusta"
 Neogastropoda - Cochlespiridae
Tropisurcula ? crenula, "Eodrillia texana" = Tropisurcula (Eodrillia) texana
Tropisurcula ? crenula snail
originally entered as "Tropisurcula crenula?"
"Eodrillia texana" = Tropisurcula (Eodrillia) texana Conrad 1865 snail
originally entered as "Eodrillia texana"
 Neogastropoda - Volutidae
"Athleta petrosus" = Athleta petrosa, Bullata semen
"Athleta petrosus" = Athleta petrosa Conrad 1833 volute
Bullata semen Lea 1833 volute
 Neogastropoda - Cancellariidae
Bonellitia sp., Trigonostoma babylonicum, Trigonostoma gemmatum
Bonellitia sp. Jousseaume 1887 snail
spp A
Trigonostoma babylonicum Lea 1833 snail
Trigonostoma gemmatum Conrad 1833 snail
 Neogastropoda - Mitridae
Fusimitra polita
Fusimitra polita mitre shell
 Sorbeoconcha - Ranellidae
"Distorsio septemdentata" = Distorsio septendentata
"Distorsio septemdentata" = Distorsio septendentata triton shell
originally entered as "Distortio septemdentata"
 Sorbeoconcha - Naticidae
Naticidae indet.
Naticidae indet. Guilding 1834 moon snail
 Sorbeoconcha - Vitrinellidae
Cyclostremiscus exacuus
 Cerithioidea - Turritellidae
Mesalia claibornensis
 Vanikoroidea - Eulimidae
Eulima extremis
Eulima extremis Aldrich 1911 snail