Table legend:
Column A: No. av. or cat. no.
Column B: Total length
Column C: Length of tail
Column D: Length of hind foot
Column E: Condylobasal breadth
Column F: Zygomatic breadth
Column G: Length of palate
Column H: Breadth of rostrum
Column I: Length of nasals
Column J: Squamosal breadth
Column K: Alveolar length of maxillary tooth-row
========================================================================
A B C D E F G H I J K
------------------------------------------------------------------------
_C. c. convexus_, Villa Acuna
52260 275 89 39 55.0 34.4 37.0 12.6 20.0 30.9 10.4
_C. c. bullatus_, 3 mi. S and 12 mi. E Nava
48500 261 80 36 49.7 35.3 34.4 12.4 17.1 29.2 9.5
La Gacha
57028 250 76 34 49.9 34.0 34.4 11.5 16.6 28.4 9.3
_C. c. ustulatus_, Don Martin
34587 280 75 37 54.6 37.3 38.2 13.7 20.6 31.8 10.3
_C. c. jucundus_, Hermanas
56605 311 80 42 56.9 38.7 40.1 13.3 21.0 32.3 9.9
_C. c. sordidulus_, 1.5 mi. NW Ocampo
56733 307 88 37 57.5 49.6 40.3 13.6 22.1 33.1 10.3
_C. c. consistus_, 3 mi. N and 9 mi. E El Pino
54547 289 94 36 53.8 32.6 37.1 12.7 18.8 29.5 9.6
_C. c. excelsus_, 2 mi. E Torreon
40224 315 97 41 54.7 37.8 37.6 12.1 19.5 31.4 9.8
_C. c. subsimus_, Hda. El Tulillo, 5 km. S Hipolito
35772 315 105 40 56.4 35.3 39.5 12.5 20.8 33.8 10.6
2 mi. N Santa Cruz
48517 316 89 40 58.2 37.9 40.3 14.1 21.7 34.8 10.3
_C. c. goldmani_, W foot Pico de Jimulco
55610 255 82 36 48.9 33.4 33.4 11.7 17.7 29.6 9.3
_C. c. subnubilus_, Carneros (BSC)
79484 247 86 34 45.3 30.9 30.8 9.6 15.7 28.4 8.5
8 mi. N La Ventura
34932 250 79 34 46.3 31.8 31.0 9.6 16.4 28.7 8.4
_C. c. planifrons_, 4 mi. S and 6 mi. E Saltillo
35779 254 76 34 48.0 32.2 32.6 9.8 16.6 28.0 8.6
35780 272 85 35 48.8 33.2 34.1 10.5 17.5 29.9 9.5
12 mi. S and 2 mi. E Arteaga
33122 255 72 35 47.0 32.3 31.2 10.5 15.5 28.7 9.0
------------------------------------------------------------------------
_Remarks._--_Cratogeomys castanops subsimus_ is the largest known
subspecies of the species in cranial dimensions, but is exceeded in
size of body by _C. c. jucundus_ to the north. Of adjacent subspecies,
_subsimus_ is the most closely related to _excelsus_ and shows little
or no relationship to the smaller and darker _C. c. subnubilus_ and
_C. c. planifrons_, which are found at higher elevations to the south
and southeast, respectively. Movements by _subsimus_ to the north,
east, and south are barred by inhospitable mountains. Specimens of
_subsimus_ from the northeastern part of its range are larger and
darker than other specimens assigned to this subspecies. An adult
female, assigned to _subsimus_, from the vicinity of Santa Rosa is
noticeably smaller and paler than typical specimens of this
subspecies.
_Cratogeomys castanops subsimus_ occurs in scattered colonies in
sandy soils principally in the upper drainage of the Rio 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 goldmani+ Merriam
1895. _Cratogeomys castanops goldmani_ Merriam, N. Amer. Fauna 8:160,
January 31, type from Canitas, Zacatecas.
_Distribution._--Plains of northeastern Zacatecas, northward into
extreme southwestern Coahuila (see fig. 1).
_Comparisons._--Compared with _Cratogeomys castanops subnubilus_,
found to the east, _goldmani_ differs 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 with _Cratogeomys castanops
rubellus_ Nelson and Goldman, found to the southeast, _goldmani_
differs in: Body and skull smaller; zygomata less widely flaring;
palate shorter; rostrum narrower; maxillary teeth smaller.
_Remarks._--Records of _goldmani_ given here extend the known range of
this subspecies northward into southwestern Coahuila. Specimens
assigned to this subspecies from Coahuila compare favorably with
topotypes of _goldmani_ (see tables 1 and 2) but are slightly paler,
and in this respect show some relationship to _excelsus_. 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 Rio Aguanaval, 1 mi. S Jimulco_, 4; 1-1/2 mi. N
Parras, 1.
+Cratogeomys castanops subnubilus+ Nelson and Goldman
1934. _Cratogeomys castanops subnubilus_ Nelson and Goldman, Proc.
Biol. Soc. Washington, 47:145, June 13, type from Carneros, 6800
ft., Coahuila.
_Distribution._--Intermontane valleys and plains of southeastern
Coahuila and probably adjacent parts of Zacatecas, San Luis Potosi and
Nuevo Leon (see fig. 1).
_Comparisons._--_Cratogeomys castanops subnubilus_ needs close
comparison only with _Cratogeomys castanops planifrons_, found to the
east and from which _subnubilus_ differs 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. From _Cratogeomys castanops rubellus_ Nelson and Goldman,
found to the south in San Luis Potosi, _subnubilus_ differs in: Body,
hind foot and all parts of skull smaller; upper parts and underparts
darker, more blackish and less rufous.
_Remarks._--_Cratogeomys castanops subnubilus_ is the smallest
subspecies of _C. castanops_ (see tables 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 of _C. castanops_ than is usual in this species, and no
intergrades between _subnubilus_ and other subspecies have been taken.
In the Sierra Guadalupe, _subnubilus_ was trapped at 6700 feet within
twomiles of a place where _subsimus_ was taken at 6500 feet.
_Specimens examined._--Total, 31, from: 1 mi. N Agua Nueva, 5500 ft.,
1; Domingo Canon, 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 planifrons+ Nelson and Goldman
1934. _Cratogeomys castanops planifrons_ Nelson and Goldman, Proc.
Biol. Soc. Washington, 47:146, June 13, type from Miquihuana,
5000 ft., Tamaulipas (listed, by mistake, as southern Nuevo
Leon).
_Distribution._--Elevated montane valleys of Sierra Madre Oriental of
extreme southeastern Coahuila, south and east into southwestern Nuevo
Leon and Western Tamaulipas (see fig. 1).
_Remarks._--Specimens from Coahuila assigned to _planifrons_ compare
favorably with topotypes of this subspecies although they are
slightly larger in cranial dimensions (see tables 1 and 2). This
small subspecies is darker and slightly larger than _subnubilus_ but
in other ways is most closely related to _subnubilus_. _Cratogeomys c.
planifrons_ shows little relation to other adjacent subspecies,
including _tamaulipensis_, _subsimus_ and _rubellus_, all of which are
considerably larger and paler.
_Cratogeomys castanops planifrons_ is 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._
25-5679
* * * * *
Transcriber's Notes:
Emphasis Notation:
_text_ - italicized
+text+ - bold
~text~ - small caps
Possible Typos Corrected
Aquanaval => Aguanaval