USGS 15523, west of McQueeney (Cretaceous of the United States)

Also known as Hilda siding; Sohl and Koch OFR # 742

Where: Guadalupe County, Texas (29.6° N, 98.1° W: paleocoordinates 35.2° N, 77.1° W)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Discoscaphites conradi ammonoid zone, Corsicana Marl Formation, Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• Haustator bilira assemblage zone

• group of beds-level stratigraphic resolution

Environment/lithology: marine; gray, silty, sandy claystone

Size class: mesofossils

Preservation: original calcite

Collected by L.W. Stephenson; reposited in the USNM

• Stephenson collection

Primary reference: C. W. Cooke. 1953. American Upper Cretaceous Echinoidea. United States Geological Survey Professional Paper 254-A:1-44 [W. Kiessling/U. Merkel/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 4503: authorized by Matt Kosnik, entered by Matt Kosnik on 14.08.1999, edited by Uta Merkel

Creative Commons license: CC BY (attribution)

Taxonomic list

Demospongiae
 Clavulina - Clionaidae
Cliona sp. demosponge
Clione sp.
Gastropoda
 Neogastropoda - Fasciolariidae
? Drilluta sp. Wade 1916 snail
Drilluta ? sp. - originally entered as "Drilluta ? sp."
Bivalvia
 Arcida - Arcidae
Arca martindalensis ark
Arca martindalensis (Stephenson)
 Arcida - Cucullaeidae
Cucullaea (Idonearca) sp., "Cucullaea (Idonearca) capax" = Idonearca capax
Cucullaea (Idonearca) sp. Conrad 1862 clam
Cucullaea (Idonearca) sp.
"Cucullaea (Idonearca) capax" = Idonearca capax Conrad 1858 clam
Cucullaea (Idonearca) capax Conrad
 Pectinida - Plicatulidae
Plicatula (Plicatula) tetrica Conrad 1860 scallop
Plicatula (Plicatula) tetrica Conr
 Pectinida - Limidae
Lima (Lima) cokei file clam
Lima (Lima) cokei Stephenson
Lima (Lima) deatsvillensis file clam
Lima (Lima) deatsvillensis Stephen
Lima (Lima) sp. BruguiƩre 1796 file clam
Lima (Lima) sp.
 Ostreida - Flemingostreidae
Cubitostrea tecticosta Gabb 1860 oyster
Cubitostrea tecticosta (Gabb)
 Ostreida - Gryphaeidae
Pycnodonte belli oyster
Pycnodonte belli Stephenson
Pycnodonte sp. Fischer von Waldheim 1835 oyster
Pycnodonte sp.
Gryphaeostrea vomer Morton 1828 oyster
Gryphaeostrea vomer Morton
"Exogyra costata" = Exogyra (Exogyra) costata Say 1820 oyster
Exogyra costata Say
 Carditida - Crassatellidae
Crassatella vadosa Morton 1834 clam
Crassatella vadosa vadosa Morton
Bryozoa
  -
Bryozoa indet. Ehrenberg 1831
Bryozoa (encrusting)
Echinoidea
 Spatangoida - Schizasteridae
Linthia variabilis Slocom 1909 heart urchin
 Spatangoida - Hemiasteridae
Hemiaster wetherbyi de Loriol 1887 heart urchin
 Cassiduloida -
"Hardouinia bexari" = Harduinia, "Hardouinia dalli" = Harduinia
"Hardouinia bexari" = Harduinia sea urchin
Hardouinea bexari Clark
"Hardouinia dalli" = Harduinia sea urchin
Hardouinea dalli Clark