Genus: Eoalphadon EATON, 2009
Etymology: Latin, eos, "dawn" + Alphadon; in reference to the antiquity (Cenomanian) of this genus from which Alphadon possibly arose.

Species: clemensi (EATON, 1993) EATON, 2009
= Alphadon clemensi EATON, 1993
Etymology: In honor of Professor William A. Clemens of the University of California Berkeley.

Holotype: MNA V6338

Locality: MNA locality 1067, Paunsaugunt Plateau, Utah.

Horizon: Dakota Formation.

Biostratigraphy:

Age: Age? Stage?, upper Middle Campanian Stage, upper middle Senonian subepoch, lower Gulf Epoch, Middle Cretaceous.

Material: LM2

Referred material:

MNA V5352: LM3?

MNA V5829: Lm1 (in mandibular fragment with partial p3)

MNA V5830: Rp3-m2:

MNA V5831: Lm3-4.

MNA V6034: Rm3?

MNA V6039: Lm2 or 3.

MNA V6051: Rdp3.

MNA V6097: Rm3?

MNA V6244: Rm4.

MNA V6316: Lm1?

MNA V6321: LM3 (labial half).

MNA V6325: Rmx.

MNA V6463: Lmx.

MNA V6791: Lm3?

MNA V6792: Lm2?

MNA V6878: Rm4.

MNA V6879: Rm1.

MNA V6881: Rmx (talonid)

MNA V6883: Rm4.

 

Locality: MNA Loc. 1064, Bryce Valley, east of Bryce Canyon National Park, southwestern Utah.

Horizon: Dakota Formation.

Biostratigraphy:

Age: Age? Stage?, upper Middle Campanian Stage, upper middle Senonian subepoch, lower Gulf Epoch, Middle Cretaceous.

Material:

MNA V5387: RM2.

 

= "Alphadon" sp. cf. "A" clemensi EATON, 2006

Locality: UMNH VP Locality 10 (Paul's Locality), Cedar Canyon, Markagunt Plateau, Iron County, southwestern Utah.

Horizon: Tibbet Canyon Member, Straight Cliffs Formation.

Biostratigraphy:

Age: Upper Turonian Stage or Lower Coniacian Stage, lowest Senonian subepoch, lower Gulf Epoch, Early Late Cretaceous.

Material:

UMNH VP 7639: m1.

UMNH VP 6943, 14068, 14086: m2 or 3.

UMNH VP 5118: m4.

 

Locality: UMNH VP Locality 11, Websters Flat Locality, Markagunt Plateau, Kane County, Southern Utah.

Horizon: Tibbet Canyon Member, Straight Cliffs Formation.

Biostratigraphy:

Age: Upper Turonian Stage or Lower Coniacian Stage, lowest Senonian subepoch, lower Gulf Epoch, Early Late Cretaceous.

Material:

UMNH VP 11650: m1.

UMNH VP 6897: m2 or 3.

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Species: lillegrveni (EATON, 1993) EATON, 2009
= Alphadon lillegraveni EATON, 1993
Etymology:

Holotype: MNA V5835

Locality: MNA locality 1067, Paunsaugunt Plateau, Utah.

Horizon: Dakota Formation.

Biostratigraphy:

Age: Age? Stage?, upper Middle Campanian Stage, upper middle Senonian subepoch, lower Gulf Epoch, Middle Cretaceous.

Material: RM2?

Referred material:

MNA V5364: Lmx.

MNA V5370: LM4.

MNA V5372: Lmx.

MNA V5375: Lm4.

MNA V5833: Lmx.

MNA V5835: RM2?

MNA V6052: LMx (partial).

MNA V6317: Rmx.

MNA V6393: LMx.

MNA V6394: Mx.

MNA V6882: Lmx.

 

Locality: MNA locality 939, Paunsaugunt Plateau, Utah.

Horizon: Dakota Formation.

Biostratigraphy:

Age: Age? Stage?, upper Middle Campanian Stage, upper middle Senonian subepoch, lower Gulf Epoch, Middle Cretaceous.

Material:

MNA V5826: RM1?

MNA V6099: RM2?

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Species: woodburnei EATON, 2009
Etymology: In honor of Michael O. Woodburne's contribution to our knowledge of fossil mammals.

Holotype: UMNH VP 12842

Locality: Locality 162, Paunsaugunt Plateau, Utah.

Horizon: Dakota Formation.

Biostratigraphy:

Age: Age? Stage?, upper Middle Campanian Stage, upper middle Senonian subepoch, lower Gulf Epoch, Middle Cretaceous.

Material: RM3 in maxillary fragment.

Referred material:

UMNH VP 12837: Lm3.

Locality: Locality 161, Paunsaugunt Plateau, Utah.

Horizon: Dakota Formation.

Biostratigraphy:

Age: Age? Stage?, upper Middle Campanian Stage, upper middle Senonian subepoch, lower Gulf Epoch, Middle Cretaceous.

Material:

UMNH VP 11637: Rmx trigonid.