Genus: Leidyosuchus LAMBE, 1907
Etymology: In honor of Joseph Leidy, American Paleontologist, and Greek, souchus, "crocodile."

Species: canadensis LAMBE, 1907
Etymology: In reference to Canada, the country of origin.

Holotype: NMC 338

Locality: Badlands on the Red Deer River below the mouth of Berry Creek, Steveville, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation (originally the upper part of the Belly River Formaiton), upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle panerai daylight replica Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material: Greater part of a left mandibular ramus.

Paratype: NMC 1551: Posterior portion of a cranium.
Note: Same as NMC 338

NMC 2784: Same as NMC 338

Referred material:

LAMBE, 1907

No. 250, No. 781, No. 1006, No. 1627: Jugals.

No. 1141, No. 1775a, No. 780: Dentary bones.

No. 782i: Posterior half of right squamosal, same specimen as No. 1765.

No. 783: Anterior end of a right maxilla showing the premaxillo-maxillary suture.

No. 808: Anterior end of a right dentary.

No. 1339, No. 1498, No. 1702: Angulars.

No. 1404: Frontal bone.

No. 1765: Anterior half of right squamosal.

Number: Not given: Cervical, dorsal, sacral and caudal vertebrae, teeth and scutes.

STERNBERG, 1917

NMC 2784: Right mandibular ramus.

 

DANIS, 1986

Locality: Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

NMC 13566:

UA 16246:

RTMP 74.10.8: Incomplete skull wiht posterior portion of braincase reconstructed.

 


Locality: Sand Creek Badlands, L14, S31, T20, R11, W4 (according to the Prarie townhip (T) and range (R) system, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation (orginally Oldman Formation), upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

ROM 1903: Complete well-presereved skull wiht mandible inplace.

 


Locality: Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, replica watches from the uk upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

NMC 8942: Well-preserved skull with posterolateral portionof right side and pterygoid flanges reconstructed.

 

ESTES, 1964

Locality: UC localities V-5002-V5004, V-5616-V-5619, V-5622, V-5624, V-5709, V-5711, V-5713, V-5715. V-5815, V-5817-5818, V-5918-5920, V-5922. Eastern Wyoming.

Horizon: Lance Formation.

Biostratigraphy:

Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given: Isolated teeth, fragmentary skull elements, vertebrae, limb elements and scutes.

 

STERNBERG, 1932

Locality: About 125 feet above the level of Red Dear River, about 3 miles Southwest of the mouth of Belly Creek, Dinosaur Provincal Park, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

NMC 8543: Skull.

 

WU, RUSSELL & BRINKMAN, 2001

Locality: San Creek Badlands, L14, S31, T20, R11, W4 (according to the Prairie township (T) and range (R) system, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 86.221.1: Almost complete well-preserved skull with mandible in position, but with damaged pterygoid flanges and posteroventral regions, including retroarticular processes of both rami of mandible.

 


Locality: L15, S30, T20, R11, W4, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 96.12.47:

 

Locality: RTMP 74.10.8, NE L10, S27, T21, R12, W4, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 96.12.47: Complete well-preserved skull with right pterygoid flange partially missing.

 


Locality: Steveille, NE, L10, S27, T21, R12, W4, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 81.16.181: Almost complete right ramus of mandible.

 

Locality: NW, L14, S21, T21, R10, W4, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 86.39.3: Almost complete right ramus of mandible.

 


Locality: 150 feet above basin, SE, L7, S32, T20, R11, W4, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 82.19.68: Right ramus of mandible missing retroarticular process.

 

Locality: Steveville, NE, L9, S22, T21, R12, W4, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 81.16.261: Incomplete left ramus of mandible with posteroventral portion heavily damaged.

 


Locality: on ridge just east of bonebed 10, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 87.36.176: Anterior third of right ramus of mandible.

 


Locality: L?, S?, T27, R12, W4, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

RTMP 83.25.3: Incomplete posterior portion of skull roof with partial braincase.

 

Locality: One Tree Creek, L ?, S14, T21, R12, W4, Dinosaur Newell County, Provincial Park, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

UALVP 40953: Complete well-preserved skull with anterior tip reconstructed.

 


Locality: Little Sandhill Creek, near the headquarters of Dinosaur Provincal Park, Dinosaur Provincial Park, Newell County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, upper Judith River Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

UALVP 40954: Incomplete, crushed skull missing posterior portion, and right ramus of mandible missing articular porton.

 

= Crocodilus humilis LEIDY, 1856 (nomen dubium)
Etymology:
= Bottosaurus? humilis (LEIDY, 1856 ) COPE, 1875 (nomen dubium)

Syntypes: 8574-8581

Locality: Nebraska Territory, Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material: 10 teeth.

Referred material:

LAMBE, 1902

Locality: Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given: Teeth.

 

LAMBE, 1902

Locality: Red Deer River, Alberta Province, Canada.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given: Teeth.

 


Locality: Mackay Creek, near Walsh, a station on the line of the Canadian Pacific Railway, east of Irvine, Alberta Province, Canada.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given: Teeth.

 


Locality: Ross coulee, near Irvine, Cypress County, Alberta Province, Canada.

Horizon: Dinosaur Park Formation, Judithian Group.

Biostratigraphy:

Age: Judithian age, Middle Campanian Stage, middle Senonian subepoch, upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given: Teeth.


= Crocodilus humilis LAMBE, 1902

Locality:

Horizon:

Biostratigraphy:

Age:

Material:

Number: Not given:

 

= Bottosaurus perrugosus LAMBE, 1902
Etymology:

Holotype:

Locality: Eastern Colorado.

Horizon: Laramie Formation.

Biostratigraphy:

Age: Lancian Age, cheap replica upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.

Material: Parts of the skull, vertebrae and some fragments.