Mylagaulidae

The Mylagaulidae or mylagaulids are an extinct clade of sciuromorph rodents nested within the family Aplodontiidae.^[1][2] They are known from the Neogene of North America and China.^[3][4] The oldest member is the Late Oligocene Trilaccogaulus montanensis that lived some 29 million years ago (Mya), and the youngest was Ceratogaulus hatcheri—formerly in the invalid genus "Epigaulus" ^[2][5]—which was found barely into the Pliocene, some 5 Mya.^[6]

Mylagaulids Temporal range: 28–5 Ma PreꞒ Ꞓ O S D C P T J K Pg N Late Oligocene - Early Pliocene
Reconstruction of Ceratogaulus hatcheri
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Mammalia
Order:	Rodentia
Suborder:	Sciuromorpha
Family:	†Mylagaulidae Cope, 1881
Subfamilies
See text

Systematics

Three subfamilies are recognized. The taxonomy of Galbreathia is not resolved; it might belong in Mylagaulinae, but lacks the characteristic apomorphies.^[6]

Promylagaulinae

• Genus Crucimys
• Genus Promylagaulus
• Genus Trilaccogaulus
• Genus Simpligaulus

Mesogaulinae

• Genus Mesogaulus - includes Mylagaulodon

Mylagaulinae

• Genus Alphagaulus (paraphyletic^[6])
• Genus Ceratogaulus - includes "Epigaulus"
• Genus Hesperogaulus
• Genus Mylagaulus
• Genus Notogaulus
• Genus Pterogaulus
• Genus Umbogaulus

incertae sedis

• Genus Galbreathia - basal in Mylagaulinae?