Monroe Creek Formation

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Monroe Creek Formation
Stratigraphic range: Paleogene
TypeGeological formation
Location
RegionSouth Dakota
CountryUnited States

The Monroe Creek Formation is a geologic formation in South Dakota. It preserves fossils dating back to the Paleogene period.

Fossil content

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Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Mammals

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Carnivorans

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Carnivorans reported from the Monroe Creek Formation
Genus Species Presence Material Notes Images
Enhydrocyon E. crassidens Shannon County, South Dakota.[1] Crushed skull (AMNH 12886) & other skull elements.[1][2] A hesperocyonine dog.
File:A Lower Miocene fauna from South Dakota (1907) fig. 6.png
E. pahinsintewakpa Multiple specimens.[1] A hesperocyonine dog.
File:Enhydrocyon restoration head.png
Leptocyon L. delicatus Porcupine Creek, South Dakota.[2][3] Left partial ramus (ACM 31102).[2][3] A canine dog, may instead be from the Harrison Formation.
File:Leptocyon head restoration.jpg
Mammacyon M. obtusidens Wounded Knee Area.[2] Skull & partial skeleton (ACM 34-41).[2] A bear-dog.
Neocynodesmus N. delicatus Porcupine Creek, Wounded Knee Area.[2] Left mandible (ACM 31102).[2] Junior synonym of Leptocyon.
Nimravus N. sectator Wounded Knee Area.[2] Left ramus (AMNH 12882).[2] Possibly instead from the Harrison Formation.
Nothocyon N. geismarianus Wounded Knee Area.[2] Fragmentary ramus (AMNH 12872).[2] An arctoid formerly thought to be a canid.
N. near latidens Wounded Knee Area.[2] Jaw fragment (AMNH 12873).[2] Reassigned to Phlaocyon.
Promartes P. gemmarosae Wounded Knee Area.[2] Nearly-complete skeleton (ACM 31-33).[2] A mustelid.

Eulipotyphlans

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Eulipotyphlans reported from the Monroe Creek Formation
Genus Species Presence Material Notes Images
Proscalops P. sp. indeterminate Wounded Knee Area.[2] Isolated molar (SDSM 5899).[2] A proscalopid.

Rodents

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Rodents reported from the Monroe Creek Formation
Genus Species Presence Material Notes Images
Allomys A. harkseni Wounded Knee Area.[2] Molars.[2] An aplodontid.
Capatanka C. brachyceps Wounded Knee Area.[2] Skull (AMNH 12902).[2] A castorid, possibly instead from the Harrison Formation.
Meniscomys M. sp. indeterminate Wounded Knee Area.[2] Isolated tooth (SDSM 59157).[2] An aplodontid.
Palaeocastor P. simplicidens Wounded Knee Area.[2] Partial cranium (AMNH 12900).[2] A castorid.
Pleurolicus P. dakotensis Wounded Knee Area.[2] Left ramus (AMNH 12893).[2] A gopher.
Promylagaulus P. cf. riggsi Wounded Knee Area.[2] Isolated molar.[2] A mylagaulid.

Ungulates

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Ungulates reported from the Monroe Creek Formation
Genus Species Presence Material Notes Images
Nanotragulus N. ordinatus Wounded Knee Area.[2] Mandibles.[2] May instead be from the Harrison Formation.
Parahippus P. pristinus Wounded Knee Area.[2] Hind feet (AMNH 12922).[2] May instead be from the Harrison Formation.

Reptiles

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Squamates

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Squamates reported from the Monroe Creek Formation
Genus Species Presence Material Notes Images
Peltosaurus P. granulosus Sharps Corner, South Dakota.[4] Multiple specimens.[4] A glyptosaurine also known from the Sharps Formation.
File:Peltosaurus.JPG

See also

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References

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