Locality 11-T-101, dry creek at mouth with Colorado River (Paleocene of the United States)

Where: Bastrop County, Texas (30.2° N, 97.5° W)

• Paleocoordinates: 37.1° N, 69.9° W (Wright 2013)

• coordinate stated in text

• outcrop-level geographic resolution

When: P3b foram zone, Solomon Creek Member (Seguin Formation), Selandian (61.6 - 59.2 Ma)

• "Turritella" layer; NP4 nannoplankton zone

• group of beds-level stratigraphic resolution

Environment/lithology: marine; concretionary sandstone and concretionary siltstone

• Typical sands and silts of the Solomon Creek Member are visible at low-water levels of the Colorado River. A discontinuous layer of brown lenticular concretions outcrop near low water levels with a substantial fauna of mainly juvenile Mollusca.

Size class: macrofossils

Primary reference: C. L. Garvie. 2013. The Molluscan Macrofauna of the Seguin Formation (Upper Paleocene) in Central Texas. Bulletins of American Paleontology 384:1-96 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 178129: authorized by Pete Wagner, entered by Pete Wagner on 20.04.2016

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Bivalvia
 Nuculida - Nuculidae
? Nucula sp.
? Nucula sp. Lamarck 1799 nut clam
 Nuculanida - Yoldiidae
Yoldia kindlei
 Nuculanida - Nuculanidae
Nuculana milamensis, Calorhadia diminutia n. sp.
Nuculana milamensis pointed nut clam
Calorhadia diminutia n. sp. pointed nut clam
 Carditida - Carditidae
Baluchicardia cf. wilcoxensis
 Cardiida - Veneridae
Pitar (Pitar) nuttalliopsis
Pitar (Pitar) nuttalliopsis venus clam
Pitar (Pitar) nuttalliopsis heilprini
 Pholadida - Corbulidae
cf. Caryocorbula coloradoensis, "Notocorbula sp." = Corbula (Notocorbula)
"Notocorbula sp." = Corbula (Notocorbula) Iredale 1930 clam
 Thraciida - Periplomatidae
Cochlodesma cf. howei
 Poromyida - Poromyidae
aff. Poromya sp.
aff. Poromya sp. Forbes 1844 clam
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium aff. mediaviense, Dentalium spp.
Dentalium spp. Linnaeus 1758 tusk shell
 Dentaliida - Fustiariidae
? Fustiaria spp.
? Fustiaria spp. Stoliczka 1868 tusk shell
Gastropoda
 Opisthobranchiata - Cylichnidae
Cylichna (Cylichnopsis) bicarinata n. sp.
 Opisthobranchiata - Scaphandridae
Mnestia ovata n. sp.
Mnestia ovata n. sp. snail
 Heterostropha - Ringiculidae
Ringicula alabamensis
 Heterostropha - Architectonicidae
Architectonica (Dinaxis) cf. planiformis
 Sorbeoconcha - Tornidae
Cochliolepis (Tylaxis) palaeocenica n. sp.
 Neogastropoda - Olividae
Eoancilla hordea n. sp.
Eoancilla hordea n. sp. olive snail
 Neogastropoda - Nassariidae
"? Tritiaria seguinensis n. sp." = Nassarius (Tritiaria)
"? Tritiaria seguinensis n. sp." = Nassarius (Tritiaria) snail
 Neogastropoda - Fasciolariidae
Palaeorhaphis palaeocenica n. sp., Pleuroploca aff. plummeri, Lirofusus sp., ? Latirus aff. stephensoni
Lirofusus sp. Conrad 1865 snail
 Neogastropoda - Melongenidae
"Levifusus pagoda" = Levifusus pagodiformis
"Levifusus pagoda" = Levifusus pagodiformis Heilprin 1881 snail
Levifusus pagoda seguinensis
 Neogastropoda - Buccinidae
Metula reticulata n. sp., Terebrifusus aff. amoenus
Metula reticulata n. sp. true whelk
Terebrifusus aff. amoenus Conrad 1833 true whelk
 Neogastropoda - Turridae
Eopleurotoma sp.
Eopleurotoma sp. Cossmann 1889 turrid
 Neogastropoda - Cancellariidae
Caveola ostium n. sp.
Caveola ostium n. sp. snail
 Neogastropoda - Costellariidae
Orthosurcula cf. adeona
 Cerithioidea - Turritellidae
Turritella polysticha, "Turritella mortoni" = Kapalmerella mortoni
"Turritella mortoni" = Kapalmerella mortoni Conrad 1830 turret shell
Turritella mortoni crassa
 Trochoidea - Skeneidae
Solariorbis velarum n. sp., Solariorbis sp.
Solariorbis velarum n. sp. snail
Solariorbis sp. Conrad 1865 snail