标题：Quaternary murid rodents of Timor. Part 1, New material of Coryphomys buehleri Schaub, 1937, and description of a second species of the genus. (Bulletin of the American Museum of Natural History, no. 341)
期刊名称：Bulletin of the American Museum of Natural History
印刷版ISSN：0003-0090
电子版ISSN：1937-3546
出版年度：2010
卷号：1
出版社：American Museum of Natural History
摘要：Large collections of fragmentary animal bones excavated from archaeological contexts in East Timor between 1968 and 2002 provide new material referable to the recently extinct, gigantic murine genus Coryphomys. We document the upper and lower dentition and palatal anatomy of C. buehleri Schaub, 1937, and identify and name a second species of Coryphomys, based on differences in molar size and morphology and skeletal robusticity. Alternative interpretations of the observed morphological and metric variability (sexual dimorphism, resource-based polymorphism, sample heterochroneity) are each carefully assessed and rejected, and we conclude that the genus comprised two species of approximately similar body size. Preserved cranial elements of both species of Coryphomys feature a high degree of anatomical specialization, including an unusual elaboration of the maxillary sinus complex. Though the specialized anatomy of Coryphomys invites consideration of its phylogenetic relationships, this ex...
