University of Kansas Publications
Museum of Natural History
Volume 14, No. 11, pp. 139-143
April 30, 1962
University of Kansas
Lawrence
1962
University of Kansas Publications, Museum of Natural History
Editors: E. Raymond Hall, Chairman, Henry S. Fitch,
Theodore H. Eaton, Jr.
Volume 14, No. 11, pp. 139-143
Published April 30, 1962
University of Kansas
Lawrence, Kansas
PRINTED BY
JEAN M. NEIBARGER, STATE PRINTER
TOPEKA, KANSAS
1962
29-2891
The White-throated woodrat, Neotoma albigula, has been knownpreviously from the Mexican state of Tamaulipas by only eight individualsreported by Goldman (N. Amer. Fauna, 31:37, October19, 1910), which were assigned to Neotoma albigula leucodon (typelocality, city of San Luis Potosí, México). Additional specimensfrom southwestern Tamaulipas, obtained in recent years by representativesof the Museum of Natural History, along with specimensfrom parts of Nuevo León and Coahuila, represent an unnamedsubspecies, which is named and described as follows:
Neotoma albigula subsolana new subspecies
Type.—Male, adult, skin and skull, No. 56950, Museum of Natural History,The University of Kansas, from Miquihuana, 6400 ft., Tamaulipas; obtainedon July 20, 1953, by Gerd H. Heinrich, original number 7553B.
Geographic distribution.—Sierra Madre Oriental from southeastern Coahuilato southwestern Tamaulipas.
Diagnosis.—Over-all size small for species (see measurements), but tail,maxillary tooth-row and incisive foramina relatively long; upper parts dark(individual hairs banded subterminally with cinnamon and tipped with grayish,yielding an over-all color of grayish brown); lips gray, especially anteriorlyand medially; alveoli of incisors narrow (4.8-5.2); posterior branch of premaxillaextending only slightly behind nasals; rostrum short; braincase broad;mastoid breadth averaging 51.1 (47.8-52.7) per cent of basilar length.
Comparisons.—Neotoma albigula subsolana, differs from topotypes of N. a.leucodon, the subspecies geographically adjacent to the southwest, as follows:size smaller, especially length of palatal bridge (6.9-8.1 instead of 8.2-9.6), alveolarlength of maxillary tooth-row (8.3-8.9 instead of 8.8-9.7), and greatestlength of auditory bulla (7.3-7.9 instead of 8.2-8.9); mastoid breadth relativelygreater, 51.1 (47.8-52.7) instead of 47.0 (45.5-49.1) per cent of basilarlength; posterior process of premaxilla extending only slightly beyond posteriorborder of nasals; auditory bulla conspicuously smaller; upper parts darker, especiallymiddorsally; over-all color grayish instead of ochraceous or yellowish;lips gray instead of nearly white.
Neotoma albigula subsolana differs from N. a. albigula, geographically adjacentto the northwest (specimens from Pima County, Arizona) as follows:size averaging slightly larger, except length of nasals; mastoid breadth averaging18.8 (17.9-20.2) instead of 17.9 (17.7-18.2), its ratio to basilar lengththerefore gr