Species: crassidens OWEN, 1850
Etymology:
Holotype: BMB 007155
Locality: Clayton Chalk Pit, near Brighton, East Sussex County, England, Southern United Kingdom.
Horizon: Chalk Marl Formation (Lower Chalk).
Biostratigraphy:
Age: Lower to Middle Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material: Fragmentary skull and fragmentary skeleton.
Skull after CALDWELL & COOPER, 1999.
Referred material:
BMB 007155: 14 dorsal vertebrae, 10 articulated, 4 associated.
BMB 012485: 4 associated vertebrae.
= Coniasaurus cf. C. crassidens CALDWELL & COOPER, 1999
Locality: Washington Chalk Pit near Worthing, West Sussex County, England, Southern United Kingdom.
Horizon: Chalk Marl Formation (Lower Chalk).
Biostratigraphy:
Age: Lower to Middle Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
NMH R25790: Fragmentary dentary bone of the mandible, with teeth.
BELL, MURRY & OSTEN, 1982
Locality: Eagle Ford Road and West Commerce Street in Dallas County, Texas.
Horizon: Lower Britton Formation.
Biostratigraphy:
Age: Late Cretaceous.
Material:
SMUSMP 69018: Pterygoid.
SMUSMP 69019, 69020, 69027: Dentaries.
SMUSMP 69021, 69023: Maxillae.
SMUSMP 29024, 69026: Cervical vertebrae.
SMUSMP 69025: Caudal vertebra.
SMUSMP 69028: Dorsal vertebra.
Locality: Arlington, Tarrent County, Texas.Horizon: Arcadian Park Formation, Eagle Ford Group.
Biostratigraphy:
Age: Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.
Material:
SMUSMP 69022: Dorsal vertebra.
Locality: Spillway at Lake Waco, Mclennan County, Texas.Horizon: Lake Waco Formation, Bluebonnet Member.
Biostratigraphy:
Age: Late Cretaceous.
Material:
SMUSMP 69029: Vertebrae.
Locality: Pepper Locality near Temple on State Highway 95 in Bell County, Texas.
Horizon: Eagle Ford Group.
Biostratigraphy:
Age: Late Cretaceous.
Material:
TMM 40239-1: Dentary.
TMM 41885-1: Dentary.
CUMBAA, SCHRODER-ADAMS, DAY & PHILLIPS, 2006
Locality: Bainbridge River Bonebed (RSM locality number 63E09-003), Pasquia Hills, along the Bainbridge River, east-central Saskatchewan, Canada.
Horizon: Belle Fourche Member, Ashville Formation.
Biostratigraphy:
Age: Cenomanian Stage, Uppermiddle Gallic Subepoch, Lowermost Gulf Epoch, Middle Cretaceous.
Material:
Number: Not given: Vertebral and dental fragments.
= Coniasaurus cf. C. crassidens DIBLEY, 1918
Locality: Peter’s Pit, near Wouldham, Kent County, England, Southern United Kingdom.
Horizon: Grey Chalk Formation.
Biostratigraphy: Holaster subglobosus zone.
Age: Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
NHM R3421: Associated right and left mandibles, fragmentary right mandible, dentary and splenial, with 9 teeth, and relatively complete left mandible, dentary, splenial, coronoid, angular, surangular, prearticular with 13 teeth.
Locality: Blue Bell Hill, Burham, Kent County, England, Southern United Kingdom.Horizon: Abbott’s Cliff Formaty, Hay Cliff Member, Lower Greys (Lower Chalk).
Biostratigraphy:
Age: Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
NHM R1937: Left maxilla with 6 complete teeth, root of a seventh, and anterior alveoli for 2 more teeth.
DIEDRICH, 1997
Locality: Hesseltal near Halle/Westf, Saschen (Saxony) State, Northwest Germany.
Horizon: Scour trough horizon I of the Puzosia-Event I.
Biostratigraphy:
Age: Upper Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
Westfalischen Museum fur Naturkunde in Munster unter der Nummer P 19913: Mandibular fragment with 4 teeth.
HILL & SPRINGFIELD, 1993
Locality: Texas.
Horizon:
Biostratigraphy:
Age: Late Cretaceous.
Material:
Number: Not given: 2 partial skeletons.
= Coniasaurus cf. C. crassidens LIGGETT, SHIMADA, BENNETT & SCHUMACHER, 2005
Locality: Northwestern Russell County, Kansas.
Horizon: Immediately above the contact between the Graneros Shale and the Lincoln Limestone member, Greenhorn Limestone.
Biostratigraphy:
Age: Cenomanian Stage, Upper Gallic subepoch, Lowest Gulf Epoch, Late Early to Early Middle Cretaceous.
Material:
FHSM VP-13999: A partial left maxilla.
FHSM VP-14000: 2 shed teeth.
FHSM VP-14001: Dorsal and caudal vertebrae.
FHSM VP-14002: 1 dorsal vertebra (found approximately 10 m south of the main excavation site).
FHSM VP-14778: 2 shed teeth.
= Coniasaurus cf. C. crassidens LYDEKKER, 1888
Locality: Hart Hill, Charing, Kent County, England, Southern United Kingdom.
Horizon: Chalk.
Biostratigraphy:
Age: Late Cretaceous.
Material:
NHM R 62: Fragment of left dentary with 3 complete teeth, fragments of a fourth and a total of 8 alveoli.
McINTOSH, SHIMADA, & EVERHART, 2016
Locality: Southern Ellis County, Kansas.
Note: Exact locality are on file at FHSM for qualified researchers.
Horison: Fairport Chalk Member, Carlile Shale, Middle Turonian, Early Late Cretaceous.
Material:
FHSM VP-15722: 3 vertebrae, and 2 other bone fragments.
= Coniasaurus cf. C. crassidens SHIMADA, PARKIN, PALERMO & SCHUMACHER, 2003, SHIMADA, SCHUMACHER, PARKIN & PALERMO, 2006
Locality: Comanche National Grassland, Baca County, southeastern Colorado.
Horizon: Lincoln Limestone Member, Greenhorn Limestone.
Biostratigraphy:
Age: Middle Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
FHSM VP-15113: Partial vertebra.
FHSM VP-15114, 15115, 15270: 3 teeth.
FHSM VP-15271: 391 teeth.
FHSM VP-15272: Fragmentary vertebra.
= Coniasaurus cf. C. crassidens SHIMADA & YSTESUND, 2007
Locality: Exact locality information is on file at FHSM, west-central Russell County, Kansas.
Horizon: Lower part of Fairport Chalk Memer, Carlile Shale.
Biostratigraphy:
Age: Middle Turonian Stage, Uppermost Gallic Subepoch, Lower Gulf Epoch, Late Cretaceous.
Material:
FHSM VP-4418: 2 incomplete vertebrae.
SMITH, SCHWERMANN & WILMSEN, 2019
Locality: DIMAC Quarry, North Rhine-Westphalia State, Germany.
Horizon: Watinoceras Bed, Hesseltal Formation.
Biostratigraphy:
Age: Lowermost Turonian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
WMNM P19913: Left dentary fragment.
WMNM P22141: Isolated worn tooth.
VOHLOH & BELL, 1998
Locality: Belle Fourche Reservior, Butte County, South Dakota.
Horizon: Basal Orman Lake Member, Greenhorn Formation.
Biostratigraphy: Dunveganoceras pondi zone.
Age: Lower Upper Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
SDSM 25896: Fragment of left maxilla with 6 teeth.
Locality: Belle Fourche Reservoir, Butte County, South Dakota.Horizon: Basal Orman Lake Member, Greenhorn Formation.
Biostratigraphy: Dunveganoceras pondi zone.
Age: Lower Upper Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
SDSM 34993: Posterior half of a cervical vertebra, possibly juvenile.
SDSM 34999: Shed tooth.
Locality: Belle Fourche Reservoir, Butte County, South Dakota.Horizon: Second calcareinte base, Orman Lake Member, Greenhorn Formation.
Biostratigraphy: Dunveganoceras pondi zone.
Age: Lower Upper Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
SDSM 34994: Mid caudal vertebra.
Locality: Angustora Reservoir, Fall River County, South Dakota.
Horizon: Basal calcarenite, Orman Lake Member, Greenhorn Formation.
Biostratigraphy: Plesiacanthoceras wyomingensis/Dunveganoceras pondi zone.
Age: Lower Upper Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
SDSM 34995: Trucnk vertebra of a juvenile.
SDSM 34996: Cervical vertebra.
SDSM 35000: Anterior cervical vertebra.
Locality: Edgmont, Fall River County, South Dakota.
Horizon: Discontinuous calcareinte bed near the middle of the third member, Greenhorn Formation.
Biostratigraphy: Sciponoceras gracile zone.
Age: Upper Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material:
SDSM 34997: 8 shed teeth.
SDSM 34998: 1 shed tooth.
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Species: gracilodens CALDWELL, 1999
Etymology: Latin, gracilo, “gracile” and Latin, dens, “tooth”:
This species is named for the more gracile posterior maxillary dentition as
compared to the type species.
Holotype: BMNH R44141
Locality: Lidden Spout, near Folkestone, East Sussex County, England, Southern United Kingdom.
Horizon: Lower chalk, Abbots Cliff Chalk Formation, [North Downs Nomenclature]-Zig Zag Chalk Formation [South Downs Nomenclature].
Biostratigraphy:
Age: Lower Cenomanian Stage, upper Gallic subepoch, Lower Gulf Epoch, Middle Cretaceous.
Material: Complete frontal, fragmentary parietal, ?squamosal?, right maxilla,
right septomaxila, fragmentary left maxilla, right and left vomeropalatines,
fragmentary pterygoids, 4 articulated dorsal vertebrae, fragmentary ribs, and
a complete left scapulocoracoid complex.