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 31.9° N, 87.7° W)

• 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: CC BY (attribution)

Taxonomic list

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