Species: obscura (LEIDY, 1856)
Etymology:
= Emys obscurus LEIDY, 1856
Holotype:
Locality: Near Long Lake, on the Missouri River below Fort Clark, North Dakota.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: Costal plate.
Referred material:
HAY, 1908
Locality: Dawson County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
AMNH: Proximal end of 2 costals, third or the fifth costal.
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Species: victa LEIDY, 1859
Etymology:
Holotype: USNM 960
Locality: Long Lake, Missouri River Below Fort Clark, North Dakota.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material: A neural and 2 costal fragments.
Referred material:
BREITHAUPT, 1982
Locality: UW Locality V-79032, east flank of Rock Springs Uplift, Sweetwater County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UW 14114: Entoplastron.
UW 14115: Neural fragments.
UW 14116: Miscellaneous carapace.
BYRANT, 1990
Locality: Eastern Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 129935: Fragmentary shell.
CARPENTER, 1979
Locality: UCM Locality 77062, Central Weld County, Colorado.
Horizon: Laramie Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
UCM 38777: Neurals.
UCM 38778: Inframarginal scutes.
UCM 38779: Costal fragments.
UCM 31243: Neural and distal costal.
Locality: UCM locality 73175, Crow Creek, Central Weld County, Colorado.
Horizon: Laramie Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
UCM 38798: Costal fragments.
ESTES, 1964
Locality: UCMP V-5003, S 1/2, Sec. 20, T37N, R64W, Lance Creek, Powder River Basin, Niobrara County, Wyoming.
Locality: UCMP V-5620, Lull Quarry, near the head of a tributary of Buck Creek, Powder River Basin, Niobrara County (Formerly Converse County), Wyoming.
Locality: UCMP V-5711, Bushy Tailed Blowout, Quarry area includes the floor of a small blowout approximately 10 yards northwest of the highest point on the ridge forming the northeastern side of the blowouts of loc. V-5003, S 1/2, Sec. 20, T37N, R64W, Lance Creek, Powder River Basin, Niobrara County, Wyoming.
Locality: UCMP V-5815, Hatcher Number 2, western side of a cross-stratified sandstone erosional remnant near the center of a large blowout on the crest of a ridge, the distance form the nearest point on the road, approximately 150 yards south of the quarry, to the Johnson ranch is 0.4 miles, Niobrara County (Formerly Converse County), Eastern Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Numbers: Not given: Fragments of carapace and plastron.
ESTES, BERBERIAN & MESZOELY, 1969
Locality: Bug Creek Anthills, McCone County, Montana.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
MCZ 3671: Numerous shell fragments.
HAY, 1908
Locality: Lance Creek, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
AMNH 6096: Right eighth costal.
HOLRYOD & HUTCHINSON, 2002
Locality: V 86049, western North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
177973, 177976:
Locality: V 86051, western North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
1779958-177959:
Locality: V 86063, western North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
172268, 172293, 172339:
Locality: V 86065, western North Dakota.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
172112:
Locality: V 86075, western North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
172398, 172422, 172441:
Locality: V 86095, western North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
172198, 177893-177897:
Locality: V 86096, western North Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
172180, 172202, 172221:
Locality: V 86099, western North Dakota.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
177855:
Locality: V 86101, western North Dakota.Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
172167, 172382:
Locality: UCMP V-5003, S 1/2, Sec. 20, T37N, R64W, Lance Creek, Powder River Basin, Niobrara County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
173393:
Localities: UCMP V-5616, Altman Blowout, this large blowout, site of the UCMP field-party camps form 1956 to 1960, is just east of the crest of the divide separating Lance Creek and Hancock Creek and 100 yards east of a dirt road. Fossils were found in anthills, talus, and sandstone exposed in the blowout, which is in the NE 1/4, Sec. 9, T37N, R64W, Eastern Wyoming.Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian Age, upper Maastrichtian Stage, uppermost Senonian Subepoch, Upper Upper Gulf Epoch, Late Cretaceous.
Material:
72895:
Locality: UCMP V-5620, Lull Quarry, near the head of a tributary of Buck Creek, Powder River Basin, Niobrara County (Formerly Converse County), Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
72897:
Locality: UCMP V-5709, Niobrara County (Formerly Converse County), Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
173374:
Locality: UCMP V-5711, Bushy Tailed Blowout, Quarry area includes the floor of a small blowout approximately 10 yards northwest of the highest point on the ridge forming the northeastern side of the blowouts of loc. V-5003, S 1/2, Sec. 20, T37N, R64W, Lance Creek, Powder River Basin, Niobrara County, Wyoming.Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
72898:
Locality: UCMP V-5815, Hatcher Number 2, western side of a cross-stratified sandstone erosional remnant near the center of a large blowout on the crest of a ridge, the distance form the nearest point on the road, approximately 150 yards south of the quarry, to the Johnson ranch is 0.4 miles, Niobrara County (Formerly Converse County), Eastern Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
72896:
Locality: UCMP V65238, Niobrara County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
72899:
Locality: UW V92036, Hanna Basin, Carbon County, Southcentral Wyoming.
Horizon: Ferris Formation.
Biostratigraphy:
Age: Lancian age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
27279:
Locality: UW V92046, Hanna Basin, Carbon County, Southcentral Wyoming.
Horizon: Ferris Formation.
Biostratigraphy:
Age: Lancian age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
25585:
Locality: UW V93003, Hanna Basin, Carbon County, Southcentral Wyoming.Horizon: Ferris Formation.
Biostratigraphy:
Age: Lancian age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
27278:
Locality: UW V93004, Hanna Basin, Carbon County, Southcentral Wyoming.
Horizon: Ferris Formation.
Biostratigraphy:
Age: Lancian age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
30610:
Locality: UW V93018, Hanna Basin, Carbon County, Southcentral Wyoming.
Horizon: Ferris Formation.
Biostratigraphy:
Age: Lancian age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
30630:
Locality: UW V93036, Hanna Basin, Carbon County, Southcentral Wyoming.Horizon: Ferris Formation.
Biostratigraphy:
Age: Lancian age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
26595:
HUTCHISON & HOLOROYD, 2003
Locality: DMNH locality 2364, Denver Basin, Colorado.
Horizon: Laramie Formation.
Biostratigraphy:
Age: Lancian age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
DMNH 42938: Peripheral margin fragment.
Locality: UCM locality 78193,Denver Basin, Colorado.
Horizon: Laramie Formation.
Biostratigraphy:
Age: Lancian age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCM 42317: Plastron fragment.
HUTCHISON, KNELL, & BRINKMAN, 2013Locality: UCMP V93095, Grand Staircase, Kane County, Utah.
Horizon: Kaiparowits Formation.
Biostratigraphy:
Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 194249: Weathered carapace including posterior costals and neurals preserved in articulation and fragments of plastron.
Locality: UCMP V93103, Grand Staircase, Kane County, Utah.
Horizon: Kaiparowits Formation.
Biostratigraphy:
Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 194287: About 20 fragments including a complete peripheral.
UCMP VP 16068: Fragments, including a complete peripheral and a costal.
Locality: UCMP V93106, Grand Staircase, Kane County, Utah.
Horizon: Kaiparowits Formation.
Biostratigraphy:
Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 194305: Shell fragments including a complete peripheral of moderat size and a hyoplastron preserving inguinal notch and the sulci in this area.
Locality: UCMP V94026, Grand Staircase, Kane County, Utah.
Horizon: Kaiparowits Formation.
Biostratigraphy:
Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 19434: About 20 shell fragments including a complete pripheral.
Locality: UCMP V94029, Grand Staircase, Kane County, Utah.
Horizon: Kaiparowits Formation.
Biostratigraphy:
Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 194336: 4 fragments including a hyoplastron that preserves the notch region and a complete first neural.
Locality: UCMP V94064, Grand Staircase, Kane County, Utah.
Horizon: Kaiparowits Formation.
Biostratigraphy:
Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 194109: 7 fragments including 2 complete neurals and a complete posterior peripheral.
Locality: UCMP V95086, Grand Staircase, Kane County, Utah.
Horizon: Kaiparowits Formation.
Biostratigraphy:
Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 194135: 5 fragments including a lateral end of a costal showing suture surface for the axillary butress located on middle of its ventral surface.
Locality: UCMP V98054, Grand Staircase, Kane County, Utah.
Horizon: Kaiparowits Formation.
Biostratigraphy:
Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP A complete hypoplastron.
Locality: UCMP V99832, Grand Staircase, Kane County, Utah.
Horizon: Kaiparowits Formation.
Biostratigraphy:
Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
UCMP 14369: About a dozen fragments including a complete peripheral.
LANGSTON, STANDHARDT & STEVENS, 1989
Locality: Big Bend National Park, Brewster County, Texas.
Horizon: Lower Aguja Formation.
Biostratigraphy:
Age: Judithian age, Upper Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Numbers: Not given:
RODRIGUEZ-DE LA ROSA & CEVALLOS-FERRIZ, 1998
Locality: El Pelillal locality and Agua de la Mula, Southestern Coahuila State, Mexico.
Horizon: Cerro del Pueblo Formation.
Biostratigraphy:
Age: Campanian Stage, Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
IGM-7695-7699: 2 neural plates, 2 costal plates and a hypoplastron fragment.
STENERSON & O’CONNER, 1994
Locality: Northwestern South Dakota.
Horizon: Hell Creek Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Numbers: Not given:
WHITMORE, 1988
Locality: SDSM Locality V851, Zerbst Locality, east of the Cheyenne River, Niobrara County, Wyoming.
Horizon: Lance Formation.Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
SDSM 12484: 1 perpheral.
SDSM 12485: 5 coastal fragments.
SDSM 12486: 20 miscellaneous carapace and plastron fragments.
Locality: SDSM Locality V852, Hanson Locality, Niobrara County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
SDSM 12487: 2 miscellaneous carapace and plastron fragments.
Locality: SDSM Locality V851A, Lower Zerbst Locality, Niobrara County, Wyoming.
Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
SDSM 12489: 2 costal fragments.
SDSM 12490: 6 miscellaneous carapace and plastron fragments.
Locality: SDSM Locality V853, Leonard’s Lizard Site, Niobrara County, Wyoming.Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
SDSM 12491: 2 miscellaneous carapace and plastron fragment.
Locality: SDSM Locality V685, Greasewood Creek Locality, northern side of the south fork of the Greasewood Creek, Niobrara County, Wyoming.Horizon: Lance Formation.
Biostratigraphy:
Age: Lancian age, upper Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
SDSM 12698: 1 carapace fragment.
= Compsemys victus WROBLEWSKI, 1998 (sic)Locality: Western Hanna Basin, Carbon County, Southcentral Wyoming.
Horizon: Ferris Formation.
Biostratigraphy:
Age: Lancian age, uppermost Maastrichtian Stage, uppermost Senonian subepoch, Upper Gulf Epoch, Late Cretaceous.
Material:
Number: Not given:
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