An Exceptional Large Sample of the Early Miocene Ctenodactyline Rodent Sayimys Giganteus, Specific Variation and Taxonomic Implications

An assemblage of the early Miocene (Ctenodactylinae, Rodentia) from its type locality Keseköy, and smaller assemblages of Yapıntı and Horlak (Anatolia, Turkey) are described. Almost all species are known from small collections of isolated cheek teeth. The very large assemblage from Keseköy is of spe...

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Published inFossil Imprint Vol. 75; no. 3; pp. 359 - 382
Main Authors Hartman, Julian, van de Weerd, Andrew A., de Bruijn, Hans, Wessels, Wilma
Format Journal Article
LanguageEnglish
Published Sciendo 01.12.2019
Subjects
Anatolia
Ctenodactylidae
fossil rodents
new species
Pakistan
revision
Siwaliks
synonymy
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Summary:An assemblage of the early Miocene (Ctenodactylinae, Rodentia) from its type locality Keseköy, and smaller assemblages of Yapıntı and Horlak (Anatolia, Turkey) are described. Almost all species are known from small collections of isolated cheek teeth. The very large assemblage from Keseköy is of special interest, because it allows the study of the intra-specific variation of dental morphology: size, the morphological changes through wear and the criteria for recognition of the tooth position of molars. The results have been used to review the formally named species and to evaluate the dental features used to define the species. The review of the early and middle Miocene succession of in the Siwaliks (Pakistan) resulted in the resurrection of . ; . is considered to be a junior synonym of . . . and . are nomina dubia, and restricted to their holotypes, . n. sp. is established for mediumsized from the Kamlial, lower Chinji and Manchar Formations and . is resurrected for from the upper Chinji and Nagri Formations. It is suggested that the middle Miocene species and . from Saudi Arabia are synonymous.
ISSN:2533-4069
2533-4069
DOI:10.2478/if-2019-0023