Sohl and Koch OFR # 540 (Cretaceous of the United States)

Also known as Hope; USGS # 7466

Where: Hempstead County, Arkansas (33.7° N, 93.7° W: paleocoordinates 38.4° N, 70.8° W)

• small collection-level geographic resolution

When: basal Member (Arkadelphia marl Formation), Maastrichtian (72.1 - 66.0 Ma)

• Haustator bilira assemblage zone.

• member-level stratigraphic resolution

Environment/lithology: marine; lithified, phosphatic, gray, sandy lime mudstone

Size class: macrofossils

Reposited in the USGS

• Stephenson collection

Primary reference: N. F. Sohl and C. F. Koch. 1984. Upper Cretaceous (Maestrichtian) larger invertebrate Fossils from the Haustator bilira Assemblage Zone in the west gulf Coastal Plain. USGS Open File Report 84-687:1-282 [M. Kosnik/M. Kosnik]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 4391: authorized by Matt Kosnik, entered by Matt Kosnik on 14.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Polychaeta
 Sabellida - Serpulidae
Serpula sp. Linnaeus 1758
Serpula sp.
Bivalvia
 Arcida - Cucullaeidae
"Cucullaea (Idonearca) capax" = Idonearca capax
"Cucullaea (Idonearca) capax" = Idonearca capax Conrad 1858 clam
Cucullaea (Idonearca) capax Conrad
 Pectinida - Anomiidae
Anomia (Anomia) argentaria Morton 1833 jingle
Anomia (Anomia) argentaria Morton
 Ostreida - Gryphaeidae
"Exogyra costata" = Exogyra (Exogyra) costata
"Exogyra costata" = Exogyra (Exogyra) costata Say 1971 oyster
Exogyra costata Say
 Mytilida - Mytilidae
Botula conchafodentis mussel
Botula conchafodentis (Gardner)
 Carditida - Crassatellidae
Crassatella vadosa Morton 1834 clam
Crassatella vadosa vadosa Morton
 Cardiida - Arcticidae
Veniella conradi Morton 1833 clam
Veniella conradi (Morton)
 Cardiida - Veneridae
Cyprimeria alta venus clam
Cyprimeria alta Conrad
 Cardiida - Cardiidae
Trachycardium sp. Mörch 1853 cockle
Trachycardium sp.
 Trigoniida - Megatrigonioidae
Pterotrigonia (Scabrotrigonia) sp. Dietrich 1933 clam
Pterotrigonia (Scabrotrigonia) sp.
Gastropoda
 Sorbeoconcha - Turritellidae
Turritella sp. Lamarck 1799 turret shell
Turritella sp.
Cephalopoda
 Ammonitida - Baculitidae
Baculites sp. Lamarck 1799 ammonite
Baculites sp.
Demospongea
 Clavulina - Clionaidae
Cliona sp. demosponge
Clione sp.