P-21 (Brazos River K-T boundary, TX) (Paleocene of the United States)

Where: Falls County, Texas (31.3° N, 97.0° W: paleocoordinates 36.1° N, 77.4° W)

• coordinate based on political unit

• small collection-level geographic resolution

When: Pisgah Member (Kincaid Formation), Danian (66.0 - 61.6 Ma)

• in foram zone P1c, composite section from CM-5 and DMC-2

Environment/lithology: marine; unlithified, argillaceous siltstone

• unconsolidated clay and clayey silt

Size class: mesofossils

Collection methods: bulk, mechanical,

Primary reference: T. A. Hansen, B. R. Farrell, and B. Upshaw, III. 1993. The first 2 million years after the Cretaceous-Tertiary boundary in east Texas: Rate and paleoecology of the molluscan recovery. Paleobiology 19(2):251-265 [A. Miller/K. Layou/M. Uhen]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 5590: authorized by Arnold Miller, entered by Karen Layou on 20.10.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Solemyida - Solemyidae
Solemya bilix Awning Clam
 Nuculida - Nuculidae
Nuculidae indet. Gray 1824 nut clam
 Nuculanida - Nuculanidae
Nuculanidae indet. Adams and Adams 1858 pointed nut clam
Jupiteria smirna pointed nut clam
Saccella sp. Woodring 1925 pointed nut clam
 Arcida - Limopsidae
Limopsis sp. Sassi 1827 clam
 Arcida - Cucullaeidae
Cucullaea sp. Lamarck 1801 clam
 Arcida - Arcidae
Striarca ? sp. Conrad 1862 clam
S.? sp. a
 Pectinida - Propeamussiidae
Amusium alabamense Aldrich 1886 mud scallop
 Ostreida - Ostreidae
Ostreidae indet. Rafinesque 1815 oyster
 Poromyida - Verticordiidae
Verticordia sp. Sowerby 1844 clam
 Poromyida - Cuspidariidae
Cuspidariidae indet. Dall 1886 clam
 Cardiida -
"Veneroida indet." = Veneroidei
"Veneroida indet." = Veneroidei Gray 1854 clam
Leptonidae/Montaautidae sp.
 Pholadida - Corbulidae
Corbulidae indet. Lamarck 1818 clam
 Lucinida - Lucinidae
Lucinidae indet. Fleming 1828 clam
L. sp. a
"Lucina cf. uhleri" = Myrtaea (Myrtaea) curta Conrad 1865 clam
 Carditida - Carditidae
Carditidae indet. Fleming 1820 clam
 Carditida - Crassatellidae
Crassatella sp. Lamarck 1799 clam
Scaphopoda
  -
Scaphopoda indet. Bronn 1862 tusk shell
 Gadilida - Gadilidae
Cadulus sp. Philippi 1844 tusk shell
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Gastropoda
 Sorbeoconcha - Vitrinellidae
Vitrinellidae indet. Bush 1897 snail
 Neogastropoda - Fasciolariidae
Fasciolariidae indet. Gray 1853 snail
F. sp. a (1), F. sp. c (1)
 Neogastropoda - Columbellidae
Columbellidae indet. Swainson 1840 snail
 Neogastropoda - Volutidae
Volutidae indet., "Volutocorbis texanus" = Athleta (Volutocorbis)
Volutidae indet. Rafinesque 1815 volute
"Volutocorbis texanus" = Athleta (Volutocorbis) volute
 Neogastropoda - Olividae
Olividae indet. Latreille 1825 olive snail
 Cerithioidea - Turritellidae
Turritellidae indet. Lovén 1847 turret shell
 Cerithioidea - Cerithiidae
Cerithiidae indet. Fleming 1822 cerith snail
C. sp. B (3), C. sp. (1)
 Cerithioidea - Litiopidae
Litiopa sp. Rang 1829 snail
L. sp. a
 Opisthobranchia - Haminoeidae
Atys sp. Montfort 1810 snail
 Opisthobranchia - Retusidae
 Heterostropha - Acteonidae
Tornatellaea sp. Conrad 1860 snail
Anthozoa
  -
Anthozoa indet. Ehrenberg 1834
solitary coral