Thomasomys, Coues, 1884

Pacheco, Víctor & Ruelas, Dennisse, 2023, Systematic Revision Of Thomasomys Cinereus (Rodentia: Cricetidae: Sigmodontinae) From Northern Peru And Southern Ecuador, With Descriptions Of Three New Species, Bulletin of the American Museum of Natural History 2023 (461), pp. 1-73 : 21

Olive-gray Thomasomys

Figures 6A , 7 , 8 , 9 , 10A , 11A, 11E , 12A , 13A ,

Figures

FIGURE 6. Living specimens of Thomasomys. A, T . cinereus (subsequently released) from La Libertad, El Fundo, Río Chuyuhual. B, T . lojapiuranus (MEPN 12549) from southern Loja, Ecuador. C, T . shallqukucha (MUSM 46882) from Lambayeque, Kañaris, Geomarca. D, T . pagaibambensis (MUSM 40358) from Cajamarca, La Granja, Quebrada Agua de la Montaña. Photos taken by Víctor Pacheco, except T . lojapiuranus that was taken by Pablo Moreno.

FIGURE 7. Dorsal, ventral, and lateral views of the cranium and mandible of Thomasomys cinereus (MUSM 46716), an adult female from Parque Nacional Cutervo, 100 m over Tragadero, San Andres district, Cutervo province, Cajamarca department, Peru. Scale bar = 10 mm.

FIGURE 8. Dorsal pelage of species of Thomasomys from northern Peru and southern Ecuador. From left to right: T . cinereus (MUSM 46716), T . lojapiuranus (MUSM 23758), T . shallqukucha (MUSM 47230), and T . pagaibambensis (MUSM 40973).

FIGURE 9. Ventral pelage of species of Thomasomys from northern Peru and southern Ecuador. From left to right: T . cinereus (MUSM 46716), T . lojapiuranus (MUSM 23758), T . shallqukucha (MUSM 47230), and T . pagaibambensis (MUSM 40973).

FIGURE 10. Left feet of adult specimens of Thomasomys species treated in this report: A, T . cinereus (MUSM 38493); B, T . lojapiuranus (MUSM 23758); C, T . shallqukucha (MUSM 46882); D, T . pagaibambensis (MUSM 40965). Abbreviations: t, thenar; h, hypothenar.

FIGURE 11. Dorsal and ventral views of adult crania of Thomasomys species treated in this report: A, E, T . cinereus (MUSM 46716); B, F, T . lojapiuranus (MUSM 23758); C, G, T . shallqukucha (MUSM 46874); D, H, T . pagaibambensis (MUSM 39527). Scale bar = 10 mm.

FIGURE 12. Lateral views of adult crania and mandibles of Thomasomys species treated in this report:A, T . cinereus (MUSM 46 716); B, T . lojapiuranus (MUSM 23758); C, T . shallqukucha (MUSM 46874); D, T . pagaibambensis (MUSM 39527). Scale bar = 10 mm.

FIGURE 13. Dorsal view of the skull of adult male crania showing the zygomatic notch area. From left to right: Thomasomys cinereus (MUSM 46716), T . lojapiuranus (MUSM 23758), T . shallqukucha (MUSM 46874), and T . pagaibambensis (MUSM 39527). Abbreviation: zn, zygomatic notch.