Route 23 roadcut (H76-31-4) (Eocene of the United States)

Also known as H76-31

Where: Choctaw County, Alabama (31.8° N, 88.3° W: paleocoordinates 33.0° N, 77.0° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Upper Member (Lisbon Formation), Lutetian (47.8 - 41.3 Ma)

• bed-level stratigraphic resolution

Environment/lithology: offshore; unlithified, gray, argillaceous siltstone

• "massive gray blue silty-sand, weathering brown. diverse and well preserved fossil assemblage."

Collection methods: bulk, mechanical, sieve,

Primary reference: T. A. Hansen. 1978. Ecological control of evolutionary rates in Paleocene - Eocene marine molluscs. Ph.D. Thesis, Yale University 1-310 [T. Hansen/M. Sommers/A. Clement]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 1439: authorized by Thor Hansen, entered by Mike Sommers on 15.04.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Bivalvia
  -
Bivalvia indet.
Bivalvia indet. Linnaeus 1758 clam
misc. bivalves, 15 species, 1 specimen each.
 Arcida - Arcidae
Pachecoa decisa
Pachecoa decisa clam
(Pachecoa)
 Pectinida - Pectinoidae
Eburneopecten scintillatus
Eburneopecten scintillatus Conrad 1854 scallop
 Ostreida - Ostreidae
Cubitostrea sellaeformis
Cubitostrea sellaeformis Conrad 1832 oyster
(Cubitostrea)
 Carditida - Carditidae
"Venericardia densata" = Venericardia (Venericor) densata
"Venericardia densata" = Venericardia (Venericor) densata Conrad 1845 clam
(Venericor)
 Pholadida - Corbulidae
Caryocorbula deusseni, Vokesula smithvillensis
Vokesula smithvillensis Harris 1919 clam
 Cardiida - Veneridae
Pitar sp.
Pitar sp. Römer 1857 venus clam
 Nuculanida - Nuculanidae
Calorhadia bella
Calorhadia bella pointed nut clam
 Nuculida - Nuculidae
"Nucula mauricensis" = Nucula (Nucula) mauricensis
"Nucula mauricensis" = Nucula (Nucula) mauricensis Harris 1919 nut clam
(Nucula)
Gastropoda
  -
Gastropoda indet.
Gastropoda indet. Cuvier 1795 snail
misc. gastropods, 6 species, 1 specimen each.
 Opisthobranchia - Retusidae
Retusa cf. galba
Retusa cf. galba snail
originally entered as "Retusa cf. galba"
 Heterostropha - Mathildidae
Gegania antiquata
 Sorbeoconcha - Ficidae
"Ficopsis penita" = Ficus
"Ficopsis penita" = Ficus fig shell
 Sorbeoconcha - Rostellariidae
Calyptraphorus sp.
Calyptraphorus sp. Conrad 1857 snail
 Neogastropoda - Volutidae
"Athleta petrosus" = Athleta petrosa, Athleta haleanus
"Athleta petrosus" = Athleta petrosa Conrad 1833 volute
petrosus
 Neogastropoda - Olividae
Ancilla staminea
Ancilla staminea Conrad 1832 olive snail
punctulifera
 Neogastropoda - Melongenidae
Levifusus mortoniopsis
 Neogastropoda - Buccinidae
Terebrifusus amoenus, Pseudoliva vetusta, Buccitriton texanum
Terebrifusus amoenus Conrad 1833 true whelk
Pseudoliva vetusta Conrad 1833 true whelk
 Neogastropoda - Turridae
Eopleurotoma sp., Eopleurotoma sp., Eopleurotoma cf. gemmavia, "Protosurcula gabbi" = Protosurcula gabbii, Eosurcula moorei
Eopleurotoma sp. Cossmann 1889 turrid
sp. A
Eopleurotoma sp. Cossmann 1889 turrid
sp. B
Eopleurotoma cf. gemmavia turrid
originally entered as "Eopleurotoma cf. gemmavia"
"Protosurcula gabbi" = Protosurcula gabbii Conrad 1865 turrid
Eosurcula moorei Gabb 1860 turrid
 Neogastropoda - Cochlespiridae
"cf. Ancistrosyrinx sp." = Cochlespira, Cochlespira engonata
"cf. Ancistrosyrinx sp." = Cochlespira Conrad 1865 snail
originally entered as "cf. Ancystosyrinx sp."
Cochlespira engonata Conrad 1865 snail
 Neogastropoda - Borsoniidae
Bathytoma cf. nonplicata
Bathytoma cf. nonplicata snail
originally entered as "Bathytoma cf. nonplicata"
 Sorbeoconcha - Naticidae
Sinum beatricae, Neverita ? limula
Sinum beatricae moon snail
Neverita ? limula Conrad 1833 moon snail
originally entered as "Neverita ? limula"
 Neotaenioglossa - Calyptraeidae
Crepidula dumosa
Crepidula dumosa Conrad 1834 slipper shell
 Cerithioidea - Turritellidae
"Turritella cf. rina" = Haustator rina, Turritella nasuta
"Turritella cf. rina" = Haustator rina turret shell
originally entered as "Turritella cf. rina"
Turritella nasuta turret shell