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

 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 - 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.
 Pectinida - Plicatulidae
Plicatula (Plicatula) tetrica Conrad 1860 scallop
Plicatula (Plicatula) tetrica Conr
 Ostreida - Gryphaeidae
Pycnodonte belli oyster
Pycnodonte belli Stephenson
Pycnodonte sp. Fischer von Waldheim 1835 oyster
Pycnodonte sp.
Exogyra costata Say 1971 oyster
Exogyra costata Say
Gryphaeostrea vomer Morton 1828 oyster
Gryphaeostrea vomer Morton
 Ostreida - Flemingostreidae
Cubitostrea tecticosta Gabb 1860 oyster
Cubitostrea tecticosta (Gabb)
 Carditida - Crassatellidae
Crassatella vadosa Morton 1834 clam
Crassatella vadosa vadosa Morton
 Neogastropoda - Fasciolariidae
? Drilluta sp. Wade 1916 snail
Drilluta ? sp. - originally entered as "Drilluta ? sp."
Bryozoa indet. Ehrenberg 1831
Bryozoa (encrusting)
 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
 Clavulina - Clionaidae
Cliona sp. demosponge
Clione sp.