Sohl and Koch OFR # 450 (Cretaceous of the United States)

Also known as Betterton; USGS # 30253

Where: Kent County, Maryland (39.3° N, 76.0° W: paleocoordinates 40.0° N, 51.8° W)

• small collection-level geographic resolution

When: Discoscaphites conradi ammonoid zone, upper Member (Severn Formation), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• Haustator bilira assemblage zone

• member-level stratigraphic resolution

Environment/lithology: marine; glauconitic, gray, argillaceous sandstone

Size class: macrofossils

Reposited in the USGS

Collection methods: bulk,

• Sohl collection

Primary reference: N. F. Sohl and C. F. Koch. 1987. Upper Cretaceous (Maestrichtian) larger invertebrates from the Haustator bilira Assemblage Zone in the Atlantic Coastal Plain with further data for the East Gulf. USGS Open File Report 87-194:1-172 [M. Kosnik/M. Kosnik]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 4376: authorized by Matt Kosnik, entered by Matt Kosnik on 14.08.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

Polychaeta
 Serpulimorpha -
Hamulus squamosus
Hamulus squamosus Gabb
Sedentaria
 Sabellida - Serpulidae
Serpula sp. Linnaeus 1758
Serpula sp.
Cephalopoda
 Ammonitida - Sphenodiscidae
Sphenodiscus sp. Meek 1871 ammonite
Sphenodiscus sp.
 Ammonitida - Scaphitidae
Discoscaphites conradi Morton 1834 ammonite
Discoscaphites conradi (Morton) va
 Ammonitida - Baculitidae
Baculites sp. Lamarck 1799 ammonite
Baculites sp. (Smooth-ovate)
Scaphopoda
 Dentaliida - Dentaliidae
Dentalium sp. Linnaeus 1758 tusk shell
Dentalium sp. (ribbed)
Bivalvia
 Myoida -
Eufistulina sp. Eames 1951 clam
Eufistulana sp. - originally entered as "Eufistulana sp."
 Thraciida - Thraciidae
cf. Corymya tennis clam
cf Corymya tennis Whitfield - originally entered as "cf. Corymya tennis"
 Cardiida - Cardiidae
Trachycardium eufaulensis Conrad 1860 cockle
Trachycardium eufaulensis (Conrad)
Cardium sp. Linnaeus 1758 cockle
Cardium sp.
Granocardium (Granocardium) sp. Gabb 1869 cockle
Granocardium (Granocardium) sp.
 Cardiida - Arcticidae
Veniella conradi Morton 1833 clam
Veniella conradi (Morton)
 Carditida - Crassatellidae
Crassatella vadosa Morton 1834 clam
Crassatella vadosa vadosa Morton
 Trigoniida - Megatrigonioidae
Pterotrigonia (Scabrotrigonia) thoracica Morton 1834 clam
Pterotrigonia (Scabrotrigonia) tho
Pterotrigonia (Scabrotrigonia) eufaulensis Gabb 1860 clam
Pterotrigonia (Scabrotrigonia) euf
 Mytilida - Mytilidae
Lithophaga sp. Röding 1798 mussel
Lithophaga sp.
Botula conchafodentis mussel
Botula conchafodentis (Gardner)
 Pectinida - Entoliidae
Syncyclonema simplicius scallop
Syncylonema simplicus (Conrad) - originally entered as "Syncylonema simplicius"
 Pectinida - Anomiidae
Anomia (Anomia) argentaria Morton 1833 jingle
Anomia (Anomia) argentaria Morton
Anomia (Anomia) ornata Gabb 1876 jingle
Anomia (Anomia) ornata Gabb
 Ostreida - Flemingostreidae
Cubitostrea tecticosta Gabb 1860 oyster
Cubitostrea tecticosta (Gabb)
 Ostreida - Ostreidae
"Ostrea mesenterica" = Lopha mesenterica
"Ostrea mesenterica" = Lopha mesenterica Morton 1834 oyster
Ostrea mesenterica Morton
 Ostreida - Gryphaeidae
Pycnodonte vesicularis Lamarck 1806 oyster
Pycnodonte vesicularis Lamarck
 Arcida - Glycymerididae
Glycymeris rotundata clam
Glycymeris rotundata (Gabb)
 Arcida - Cucullaeidae
"Cucullaea (Idonearca) capax" = Idonearca capax
"Cucullaea (Idonearca) capax" = Idonearca capax Conrad 1858 clam
Cucullaea (Idonearca) capax Conrad
Gastropoda
 Sorbeoconcha - Aporrhaidae
Arrhoges (Latiala) sp. Gabb 1868 snail
Arrhoges (Latiala) sp.
 Neogastropoda - Pyropsidae
Pyropsis sp. Conrad 1860 snail
Pyropsis spp.
 Neogastropoda - Paladmetidae
Paladmete laevis Sohl 1964 snail
Paladmete laevis Sohl
 Cerithioidea - Turritellidae
"Turritella (Sohlitella) bilira" = Haustator bilira, Turritella paravertebroides, Turritella sp.
"Turritella (Sohlitella) bilira" = Haustator bilira Stephenson 1941 turret shell
Turritella (Sohlitella) bilira (St
Turritella paravertebroides turret shell
Turritella paravertebroides Gardne
Turritella sp. Lamarck 1799 turret shell
Turritella sp.
 Heterostropha - Acteonidae
"Actaeon cicatricosus" = Acteon
"Actaeon cicatricosus" = Acteon snail
Acteon cicatricosus Sohl - originally entered as "Acteon cicatricosus"
Deuteropoda
  -
Malacostraca indet. Latreille 1802
Crab parts
unclassified
  -
Vertebrata indet. Lamarck 1801
Shark parts