TABLE 2.Measurements of Adult Male Cratogeomys fromCoahuila, MéxicoTable legend:Column A:No. av. or cat. no.Column B:Total lengthColumn C:Length of tailColumn D:Length of hind footColumn E:Condylobasal breadthColumn F:Zygomatic breadthColumn G:Length of palateColumn H:Breadth of rostrumColumn I:Length of nasalsColumn J:Squamosal breadthColumn K:Alveolar length of maxillary tooth-row=ABCDEFGHIJKC. c. convexus, Villa Acuña52260275893955.034.437.012.620.030.910.4C. c. bullatus, 3 mi. S and 12 mi. E Nava48500261803649.735.334.412.417.129.29.5La Gacha57028250763449.934.034.411.516.628.49.3C. c. ustulatus, Don Martin34587280753754.637.338.213.720.631.810.3C. c. jucundus, Hermanas56605311804256.938.740.113.321.032.39.9C. c. sordidulus, 1.5 mi. NW Ocampo56733307883757.549.640.313.622.133.110.3C. c. consistus, 3 mi. N and 9 mi. E El Pino54547289943653.832.637.112.718.829.59.6C. c. excelsus, 2 mi. E Torreón40224315974154.737.837.612.119.531.49.8C. c. subsimus, Hda. El Tulillo, 5 km. S Hipolito357723151054056.435.339.512.520.833.810.62 mi. N Santa Cruz48517316894058.237.940.314.121.734.810.3C. c. goldmani, W foot Pico de Jimulco55610255823648.933.433.411.717.729.69.3C. c. subnubilus, Carneros (BSC)79484247863445.330.930.89.615.728.48.58 mi. N La Ventura34932250793446.331.831.09.616.428.78.4C. c. planifrons, 4 mi. S and 6 mi. E Saltillo35779254763448.032.232.69.816.628.08.635780272853548.833.234.110.517.529.99.512 mi. S and 2 mi. E Arteaga33122255723547.032.331.210.515.528.79.0
TABLE 2.Measurements of Adult Male Cratogeomys fromCoahuila, MéxicoTable legend:Column A:No. av. or cat. no.Column B:Total lengthColumn C:Length of tailColumn D:Length of hind footColumn E:Condylobasal breadthColumn F:Zygomatic breadthColumn G:Length of palateColumn H:Breadth of rostrumColumn I:Length of nasalsColumn J:Squamosal breadthColumn K:Alveolar length of maxillary tooth-row=ABCDEFGHIJKC. c. convexus, Villa Acuña52260275893955.034.437.012.620.030.910.4C. c. bullatus, 3 mi. S and 12 mi. E Nava48500261803649.735.334.412.417.129.29.5La Gacha57028250763449.934.034.411.516.628.49.3C. c. ustulatus, Don Martin34587280753754.637.338.213.720.631.810.3C. c. jucundus, Hermanas56605311804256.938.740.113.321.032.39.9C. c. sordidulus, 1.5 mi. NW Ocampo56733307883757.549.640.313.622.133.110.3C. c. consistus, 3 mi. N and 9 mi. E El Pino54547289943653.832.637.112.718.829.59.6C. c. excelsus, 2 mi. E Torreón40224315974154.737.837.612.119.531.49.8C. c. subsimus, Hda. El Tulillo, 5 km. S Hipolito357723151054056.435.339.512.520.833.810.62 mi. N Santa Cruz48517316894058.237.940.314.121.734.810.3C. c. goldmani, W foot Pico de Jimulco55610255823648.933.433.411.717.729.69.3C. c. subnubilus, Carneros (BSC)79484247863445.330.930.89.615.728.48.58 mi. N La Ventura34932250793446.331.831.09.616.428.78.4C. c. planifrons, 4 mi. S and 6 mi. E Saltillo35779254763448.032.232.69.816.628.08.635780272853548.833.234.110.517.529.99.512 mi. S and 2 mi. E Arteaga33122255723547.032.331.210.515.528.79.0
Remarks.--Cratogeomys castanops subsimusis the largest known subspecies of the species in cranial dimensions, but is exceeded in size of body byC. c. jucundusto the north. Of adjacent subspecies,subsimusis the most closely related toexcelsusand shows little or no relationship to the smaller and darkerC. c. subnubilusandC. c. planifrons, which are found at higher elevations to the south and southeast, respectively. Movements bysubsimusto the north, east, and south are barred by inhospitable mountains. Specimens ofsubsimusfrom the northeastern part of its range are larger and darker than other specimens assigned to this subspecies. An adult female, assigned tosubsimus, from the vicinity of Santa Rosa is noticeably smaller and paler than typical specimens of this subspecies.Cratogeomys castanops subsimusoccurs in scattered colonies in sandy soils principally in the upper drainage of the Río Salinas. Specimens have also been taken from the foothills of the Sierra Madre Oriental and westward on the elevated desert plains.
Remarks.--Cratogeomys castanops subsimusis the largest known subspecies of the species in cranial dimensions, but is exceeded in size of body byC. c. jucundusto the north. Of adjacent subspecies,subsimusis the most closely related toexcelsusand shows little or no relationship to the smaller and darkerC. c. subnubilusandC. c. planifrons, which are found at higher elevations to the south and southeast, respectively. Movements bysubsimusto the north, east, and south are barred by inhospitable mountains. Specimens ofsubsimusfrom the northeastern part of its range are larger and darker than other specimens assigned to this subspecies. An adult female, assigned tosubsimus, from the vicinity of Santa Rosa is noticeably smaller and paler than typical specimens of this subspecies.
Cratogeomys castanops subsimusoccurs in scattered colonies in sandy soils principally in the upper drainage of the Río Salinas. Specimens have also been taken from the foothills of the Sierra Madre Oriental and westward on the elevated desert plains.
Specimens examined.--Total, 22, from: 3 mi. S and 3 mi. E Muralla, 3800 ft., 3; 2 mi. N Santa Cruz, 2; 21 mi. S and 11 mi. E Australia, 4400 ft., 6; Jaral, 3860 ft., 4 (BSC);Hacienda El Tulillo, 5 km. S Hipolito, 2; 17 mi. N and 8 mi. W Saltillo, 5200 ft., 1; 3 mi. N and 5 mi. W La Rosa, 3600 ft., 1; 12 mi. N and 10 mi. E Parras, 5000 ft., 1; N foot Sierra Guadalupe, 9 mi. S and 5 mi. W General Cepeda, 6200 ft., 1;N foot Sierra Guadalupe, 10 mi. S and 5 mi. W General Cepeda, 6500 ft., 1.
Cratogeomys castanops goldmaniMerriam
Distribution.--Plains of northeastern Zacatecas, northward into extreme southwestern Coahuila (seefig. 1).
Comparisons.--Compared withCratogeomys castanops subnubilus, found to the east,goldmanidiffers in: Body larger, tail and hind foot longer; color paler, more rufous and less blackish; skull larger; zygomata more widely flaring; palate larger; rostrum broader; nasals longer; maxillary teeth larger. Compared withCratogeomys castanops rubellusNelson and Goldman, found to the southeast,goldmanidiffers in: Body and skull smaller; zygomata less widely flaring; palate shorter; rostrum narrower; maxillary teeth smaller.
Remarks.--Records ofgoldmanigiven here extend the known range of this subspecies northward into southwestern Coahuila. Specimens assigned to this subspecies from Coahuila compare favorablywith topotypes ofgoldmani(seetables 1 and 2) but are slightly paler, and in this respect show some relationship toexcelsus. The ranges of these two subspecies however, are partly isolated by mountainous country in southern Coahuila.
Specimens examined.--Total, 6, from: W foot Pico de Jimulco, 4600 ft., 1;Valley RíoAguanaval, 1 mi. S Jimulco, 4; 1-1/2 mi. N Parras, 1.
Cratogeomys castanops subnubilusNelson and Goldman
Distribution.--Intermontane valleys and plains of southeastern Coahuila and probably adjacent parts of Zacatecas, San Luis Potosí and Nuevo León (see fig. 1).
Comparisons.--Cratogeomys castanops subnubilusneeds close comparison only withCratogeomys castanops planifrons, found to the east and from whichsubnubilusdiffers in: Body, hind foot and skull smaller; upper parts, in summer pelage, paler, more rufous-buff and less dark russet; underparts paler, more whitish and less blackish; hairs of hind foot reddish rather than blackish; zygomata more widely flaring; palate shorter, especially in females; rostrum broader, especially in females; nasals slightly smaller; squamosal breadth greater; incisors narrower, especially in males; maxillary teeth smaller. FromCratogeomys castanops rubellusNelson and Goldman, found to the south in San Luis Potosí,subnubilusdiffers in: Body, hind foot and all parts of skull smaller; upper parts and underparts darker, more blackish and less rufous.
Remarks.--Cratogeomys castanops subnubilusis the smallest subspecies ofC. castanops(seetables 1 and 2). This subspecies is dark and lives at high elevations (5500 ft. to 6800 ft.) in deep valley soils in relatively isolated intermontane valleys and elevated plains. It is differentiated to a much higher degree from adjacent subspecies ofC. castanopsthan is usual in this species, and no intergrades betweensubnubilusand other subspecies have been taken. In the Sierra Guadalupe,subnubiluswas trapped at 6700 feet within two miles of a place wheresubsimuswas taken at 6500 feet.
Remarks.--Cratogeomys castanops subnubilusis the smallest subspecies ofC. castanops(seetables 1 and 2). This subspecies is dark and lives at high elevations (5500 ft. to 6800 ft.) in deep valley soils in relatively isolated intermontane valleys and elevated plains. It is differentiated to a much higher degree from adjacent subspecies ofC. castanopsthan is usual in this species, and no intergrades betweensubnubilusand other subspecies have been taken. In the Sierra Guadalupe,subnubiluswas trapped at 6700 feet within two miles of a place wheresubsimuswas taken at 6500 feet.
Specimens examined.--Total, 31, from: 1 mi. N Agua Nueva, 5500 ft., 1; Domingo Cañon, Sierra Guadalupe, 6700 ft., 11 mi. S and 4 mi. W General Cepeda, 1; Carneros, 6800 ft., 6 (BSC);1 mi. S Carneros, 6000 ft., 4; 2 mi. W San Miguel, 5500 ft., 3; 8 mi. N La Ventura, 6000 ft., 10; La Ventura, 5600 ft, 6 (BSC).
Cratogeomys castanops planifronsNelson and Goldman
Distribution.--Elevated montane valleys of Sierra Madre Oriental of extreme southeastern Coahuila, south and east into southwestern Nuevo León and Western Tamaulipas (seefig. 1).
Remarks.--Specimens from Coahuila assigned toplanifronscompare favorably with topotypes of this subspecies although they are slightly larger in cranial dimensions (seetables 1 and 2). This small subspecies is darker and slightly larger thansubnubilusbut in other ways is most closely related tosubnubilus.Cratogeomys c. planifronsshows little relation to other adjacent subspecies, includingtamaulipensis,subsimusandrubellus, all of which are considerably larger and paler.Cratogeomys castanops planifronsis found in both deep and shallow soils of the high, open valleys of the Sierra Madre Oriental; in Coahuila it was taken at elevations as low as 7200 feet and as high as 8700 feet.
Remarks.--Specimens from Coahuila assigned toplanifronscompare favorably with topotypes of this subspecies although they are slightly larger in cranial dimensions (seetables 1 and 2). This small subspecies is darker and slightly larger thansubnubilusbut in other ways is most closely related tosubnubilus.Cratogeomys c. planifronsshows little relation to other adjacent subspecies, includingtamaulipensis,subsimusandrubellus, all of which are considerably larger and paler.
Cratogeomys castanops planifronsis found in both deep and shallow soils of the high, open valleys of the Sierra Madre Oriental; in Coahuila it was taken at elevations as low as 7200 feet and as high as 8700 feet.
Specimens examined.--Total, 50, from: 4 mi. S and 6 mi. E Saltillo, 7500 ft, 7; 7 mi. S and 4 mi. E Bella Union, 7200 ft., 14;12 mi. W San Antonio de las Alazanas, 16;12 mi. S and 2 mi. E Arteaga, 7500 ft., 11; 2 mi. E and 2 mi. N San Antonio de las Alazanas, 8700 ft, 2.
Transmitted August 23, 1954.
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