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Cachiyacuy : ウィキペディア英語版
Cachiyacuy

''Canaanimys'' is an extinct genus of caviomorph known from the Loreto of Peru. It contains two species: the type species ''C. contamanensis'' and ''C. kummeli''.
== Description ==
All ''Cachiyacuy'' specimens were collected in the CTA-27 Locality (or Maquía locality), from the uppermost part of the Yahuarango Formation, dating to the latest Lutetian stage of the late Middle Eocene, about 41 million years ago. The type species ''C. contamanensis'' is known from the holotype MUSM 1871, a right second molar and from some referred teeth including MUSM 1870, MUSM 1872, MUSM 1873, MUSM 1874, MUSM 1875, MUSM 1876, MUSM 1877, MUSM 1878, MUSM 1879 and MUSM 1880. Its body mass estimated at 80–120 gram. The second species ''Cachiyacuy kummeli'' is known from the holotype MUSM 1882, a left first molar and from some referred teeth including MUSM 1881, MUSM 1883, MUSM 1885, MUSM 1886, MUSM 1887 and MUSM 1888. It was a tiny rodent, approximately 30% smaller than ''C. contamanensis'' as its body mass estimated at 30–40 gram. A cladistic analysis found ''Cachiyacuy'' to be monophyletic and one of the basalmost and the oldest known caviomorph (the other being ''Canaanimys'' from the same locality).〔

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