Species: foveatus (LEIDY, 1856) GARDNER, RUSSELL & BRINKMAN, 1995
Etymology:
= Trinonyx foveatus LEIDY 1856 (nomen dubium)
= Aspideretes (Trinonyx) foveatus (LEIDY, 1856) BROWN, 1907
= Aspideretes foveatus (LEIDY, 1856) HAY, 1908

Syntypes: ANSP 9269

Locality: Badlands of the Judith River, Montana.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material: Fragments of several costal and sternal plates.

Referred material:

DEMAR & BREITHAUPT, 2006

Locality: UW V-81006, False Rocks Quarry (part of BQFR, Barwin Quarry False Rocks), southeastern Wind River Basin, Wyoming.

Horizon: Mesaverde Formation.

Biostratigraphy:

Age: Judithian Age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

UW 34817: Neural.

LEIDY, 1856

Locality: Long Lake below old Fort Clark on the Missouri River, North Dakota.

Horizon: Lance Formation.

Biostratigraphy:

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

Material:

Number: Not given:

 

EBERTH, 1987

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:

Number: Not given:

GARDNER, RUSSELL, & BRINKMAN, 1995

Locality: Montana.

Horizon: Hell Creek Formation.

Biostratigraphy:

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

Material:

AMNH 1017: 2 neurals.

 

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:

BMNH R4235: Carapace and plastron.

NMC 1139, RTMP 67.13.57: Hyoplastrons.

NMC 1264: Plastron.

NMC 1824: Hyo- and hypoplastra.

NMC 1453, 1454, 8711, 8712, 8713, ROM 675, 676, 827, 872, 1418, 1419, 1789, 2957, 43644, RTMP 79.8.766, 80.16.1686, 80.37.57, 81.19.174, 81.19.176, 81.28.3, 82.21.4, 85.36.58, 85.67.1, UALVP 33389: Carapaces.

NMC 41623, RTMP 81.24.7: Skeletons.

RTMP 86.124.12, 87.48.19: Dentaries.

NMC 41623, RTMP 81.24.7: Fragmentary skulls.

 

Locality: Leader, Saskatchewan Province, Canada.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

SMNH P2340.1: Costal.

 

Locality: Onefour, Cypress County, Alberta Province, Canada.

Horizon: Judith River Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

ROM 1789, RTMP 91.61.13: Carapaces.

 

Locality: Montana.

Horizon: Two Medicine Formation.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

USNM 13905, 14668: Carapaces.

 

KNOWLTON, 1991/LAMBE

Locality: Red Deer River region, Alberta Province, Canada.

Horizon: Judith River Formation, Judith River Group.

Biostratigraphy:

Age: Judithian age, Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

Number: Not given:

 

MERRILL, 1907

Locality: Long Lake, Nebraska.

Horizon: Laramine Formation.

Biostratigraphy:

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

Material:

USNM 990: Costal Plate.

 

= Aspideretes subquadratus LAMBE, 1914
Etymology:
= Trionyx (Aspideretes) subquadrates (LAMBE 1914) HUMMEL, 1929
= Trionyx subquadrates (LAMBE, 1914), HUMMEL, 1932

Holotype: NMC 345

Locality: Dinosaur Provincal Park, Red Deer River, 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: Carapace.

 

= Aspideretes maturus LAMBE, 1914
Etymology:
= Trionyx maturus (LAMBE, 1914) KUHN, 1964

Holotype: NMC 1065

Locality: Dinosaur Provincial Park, Red Deer River, 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: Carapace.

 

= Aspideretes rugosus PARKS, 1933
Etymology:
= Trionyx rugosus (PARKS, 1933) KUHN, 1964

Holotype: ROM 775

Locality: Sand Creek,  Red Deer River, 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: Carapace.

_____________________________________________________________________________________

Species: austerus (HAY, 1908) SULLIVAN, JASINSKI, & LUCAS, 2013
Etymology:
= Aspideretes austerus HAY, 1908

Holotype: AMNH 6068

Locality: Ojo Alamo Trading Post, San Juan County, New Mexico.

Horizon: Naashoibito Member, Latest Kirkland Formation (Alamo Wash Formation).

Biostratigraphy:

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

Material: Fragmentary shell.

Referred material:

SULLIVAN, JASINSKI, & LUCAS, 2013

Locality: Unknown, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

USNM 12988: Anteiror part of carapace.

USNM 6550: Partial carapace.

Locality: 210, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-811: Several pieces of plastron and carapace.

SM P VP-1959: Large plastron fragment.

Locality: 319a, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1717: Incomplete right hypoplastron and other plastron fragments.

SMP VP-1844: Carapace fragments.

Locality: 382, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1868: Costals and nuchal.

Locality: 389a, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1364: Hypoplastron and other plastral elements.

SM P VP-2376: Costal and carapce fragments.

Locality: 3226, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNH P-27847: Incomplete costals, xiphiplastron, hypoplastron and girdle.

Locality: 3227, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNH P-26230: Costal fragments and neural.

Locality: 4721, New Mexico.

Horizon: De-na-zin Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Aspideretoides cf. A. austerus

NMMNHP-33914: 2 incomplete costals.

= Aspideretes vorax HAY, 1908
Etymology:
= Trionyx vorax (HAY, 1908) HUMMEL, 1932

Holotype: AMNH 6140

Locality: Ojo Alamo Trading Post, San Juan County, New Mexico.

Horizon: Naashoibito Member, Latest Kirkland Formation (Alamo Wash Formation).

Biostratigraphy:

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

Material: Nuchal.

Referred material:

GILMORE, 1935

Locality: 3 miles northeast of Hunter's Store (Bisti P. O.), SW 1/4, T24N, R13W, San Juan Basin, New Mexico.

Horizon: Lower Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

USNM 12988: Anterior third of the carapace.

 

LEHMAN, 1981

Locality: San Juan County, New Mexico.

Horizon: Hunter Wash Local Fauna, Hunter Wash Member, Lower Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Number: Not given:

= Aspideretes fontanus HAY, 1908
Etymology:

Holotype: AMNH 6070

Locality: Ojo Alamo Trading Post, San Juan County, New Mexico.

Horizon: Naashoibito Member, Latest Kirkland Formation (Alamo Wash Formation).

Biostratigraphy:

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

Material: Fragmentary shell.
_____________________________________________________________________________________

Species: robustus (GILMORE, 1919) SULLIVAN, JASINSKI, & LUCAS, 2013
Etymology: Latin, robustus, "robust."
= Plastomenus robustus GILMORE, 1919
= Trionyx robustus (GILMORE, 1919) KUHN, 1964
= Hummelichelys rodustus (GILMORE, 1919) CHKHIKVADZE, 2000 (sic)

Holotype: USNM 8538

Locality: South side of Ah-shi-sle-pah Wash, 3 1/2 miles southwest of Kimbetoh, near the south side of sec. 4, T 22N, R 10W, San Juan County, New Mexico.

Horizon: Hunter Wash Local Fauna, Lower Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Nearly perfect carapace and the hyoplastron and hypoplastron of the right side.

Referred material:

ADRIAN, SMITH & McDONALD, 2025

Locality: San Juan County, New Mexico.
Note: Exact locality data are on file at teh BLM and the respective repositories.

Horizon: Menefee Formation.

Biostratigraphy:

Age: Early Campanian Stage, Senonian subepoch, Upper Gulf epoch, Late Cretaceous.

Material:

WSC 10766: Distal end of right costal 6 or 7.

 

SULLIVAN, 2006

Locality: Eagle's Nest Flat, SMP locality 398, Ah-Shi-Sle-Pah Wilderness Study Area, San Juan Basin, San Juan County, New Mexico.

Horizon: Fossil Forest Member, Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1667: Incomplete nuchal, right and left xiphiplasra and associated fragments.

 

SULLIVAN, JASINSKI, & LUCAS, 2013

Locality: 4104, New Mexico.

Horizon:Unknown, Kirtland/Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNH P-30756: Cosal fragments.

 

Locality: Unknown, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

PMU.R.30: Nearly complete carapace.

PMU.R.31: Right hypoplastron and xiphiplastron, plust left hyoplastron, hypoplastron, and Xiphiplastron.

USNM 12989: Left hyoplastron and hypoplastron.

 

Locality: Unknown, New Mexico.

Horizon: Farmington? Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

USNM 8350: Left hypoplastron.

 

 

Locality: 228, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1856: Carapace fragment.

 

Locality: 281, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1856: Carapace fragment.

Aspideretoides cf. A. robustus

SMP VP-1525: Costal and other fragments.

 

Locality: 396, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1685: Incomplete xiphiplastron.

 

 

Locality: 400, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-1612: Carapace fragments.

SMP VP-1679: Incomplete costal.

SMP VP-1682: nearly complete costal.

 

Locality: 1581, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNH P-27941: Incomplete costal.

 

Locality: 4274, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNH P-30066: Costal.

 

Locality: 5163, New Mexico.

Horizon: Hunter Wash Member, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNH P-39632: 2 fused incomplete costals and associated fragments.

 

Locality: 6340, New Mexico.

Horizon: Hunter Wash Member? Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Aspideretoides cf. A. robustus

NMMNH P-49786 (Previously UA 14399): Shell fragment.

 

 

Locality: 6547, New Mexico.

Horizon: Hunter Wash Member? Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Aspideretoides cf. A. robustus

NMMNH P-49848 (Previously UA 14397): Shell fragment.

 

Locality: 6548, New Mexico.

Horizon: Hunter Wash Member? Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNH P-49862 (Previously UA 11737): Incomplete costal.

 

Locality: 6560, New Mexico.

Horizon: Hunter Wash Member?, Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNHP-49862 (UA 13319): Incomplete costal.

 

 

Locality: 463, New Mexico.

Horizon: Fossil Forest Member?, Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

SMP VP-2698: Carapace fragments, including nuchal and neural.

 

Locality: 1675, New Mexico.

Horizon: Fossil Forest Member?, Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Aspideretoides cf. A. robustus

NMMNH P-22751: Various carapace/plasteron fragments.

 

 

Locality: 1882, New Mexico.

Horizon: Fossil Forest Member?, Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNH P-28321: Costal fragment.

Aspideretoides cf. A. robustus

NMMNH P-28320: Numerous carapace fragments.

 

Locality: 4015, New Mexico.

Horizon: Fossil Forest Member?, Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

NMMNH P-27779: Incomplete right hypoplastron.

NMMNH P-27826: Incomplete costal and numerous fragments.

NMMNH P-27572: Fragments.

NMMNH P-27628: Numerous carapace/plastron fragmetns.

NMMNH P-27633: Various costal and various fragments.

NMMNH P-27752: Incomplete cosals and various fragments.

NMMNH P-27768: 2 plastron fragments.

NMMNH P-27777: Carapace/plastron fragments.

Aspideretoides cf. A. robustus

NMMNH P-27769: Plastron fragment.

 

Locality: 4717, New Mexico.

Horizon: Fossil Forest Member?, Fruitland Formation.

Biostratigraphy:

Age: Kirtlandian Age, Late Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material:

Aspideretoides cf. A. robustus

NMMNH P-33912: Plastron fragment.

 

 

= Aspideretes ovatus GILMORE, 1935
Etymology:

Holotype: USNM 12986

Locality: 7 miles northwest of Brimhall's Store, San Juan County, New Mexico.

Horizon: Hunter Wash Local Fauna, Lower Kirtland Formation.

Biostratigraphy:

Age: Kirtlandian age, Upper Campanian Stage- Lower Maastrichtian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.

Material: Carapace lacking a portion of the anterior border and fragmentary parts of the plastron.

Referred material:

USNM 12987: Fragmentary carapace.

_____________________________________________________________________________________

Species: alleni (GILMORE 1923)
Etymology:
= Aspideretes allani GILMORE, 1923
= Trionyx (Aspideretes) allani (GILMORE, 1923), HUMMEL, 1929
= Trionyx allani (GILMORE, 1923) KUHN, 1964

Holotype: UALVP 01

Locality: Dinosaur Provincial Park, Sec. 32, Tp. 20, Rg. 12 W, W. 4th Mer., Sand Creek, Red Deer River, 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: Anterior portion of the skull, part of the lower mandible, 2 cervicals and a few bones of the feet are the only parts missing.

Referred material:

EBERTH, 1987

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:

Number: Not given:

 

GARDNER, RUSSELL & BRINKMAN, 1995

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 41624, RTMP 74.10.79, 90.119.3: Hyo-hyoplastra.

ROM 1431: Carapaces.

RTMP 80.16.1384: Hyoplastron

RTMP 81.22.14: Hypoplastron.

RTMP 86.78.64, 87.36.344: Hyoplastra.

RTMP 92.61.3: Xiphiplastron.