. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WOOD AND PATTERSON : OLIGOCENE RODENTS OF PATAGONIA 329 present, very tentative, conception of affinities within this very complex and little understood group is shown in Figure 12. SANTACRUZIAN COLHUEHUAPIAN DESEADAN CHINCHILLIDAE NEOREOMYS SCLEROMYS. OLENOPSIS LITODONTOMYS OCTODONTIDAE Fig. 12. Tentative phjiogeny of the Oligocene and early Miocene Dasyproctidae. Cephalomys Ameghino, 1897 Cephalomys Ameghino 1897c, p. 494. Loomis 1914, pp. 186-188; Stehlin and SehauL , p. 61; Schaub, in Stehlin and Schaub 1951,
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WOOD AND PATTERSON : OLIGOCENE RODENTS OF PATAGONIA 329 present, very tentative, conception of affinities within this very complex and little understood group is shown in Figure 12. SANTACRUZIAN COLHUEHUAPIAN DESEADAN CHINCHILLIDAE NEOREOMYS SCLEROMYS. OLENOPSIS LITODONTOMYS OCTODONTIDAE Fig. 12. Tentative phjiogeny of the Oligocene and early Miocene Dasyproctidae. Cephalomys Ameghino, 1897 Cephalomys Ameghino 1897c, p. 494. Loomis 1914, pp. 186-188; Stehlin and SehauL , p. 61; Schaub, in Stehlin and Schaub 1951, pp. 245-246. Orchiomys Ameghino 1897c, p. 495. Asteromys Ameghino 1897c, p. 495; 1902b, p. 37 (in part, not including type species). Type species. Cephalomys arcidens Ameghino 1897. Referred species. Cephalomys plexus Ameghino 1897. Type species of Orchiomys prostans Ameghino 1897. Distribution. Deseadan, Patagonia. Emended diagnosis. Teeth high-crowned but rooted, with uni- lateral hypsodonty, particularly in upper molars; no cement on cro^^'ns; crown pattern of unworn cheek teeth essentially re- sembling that of Neoreomys, also basically similar to that of Platypittamys but with P^ much more advanced than in latter; pattern disappearing fairly rapidly with wear, much less per- sistent than in Neoreomys; enamel interrupted on lingual and anterior sides of lower teeth and buccal and posterior sides of upper teeth after considerable wear; rostrum shorter than in Platypittamys, narrower than in Neoreomys; fossa for M. masse- tericus medius pars anticus present on lateral surface of rostrum but smaller than in Neoreomys; infraorbital foramen. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
Size: 2628px × 951px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
