The Amphibians and Reptiles of Sinaloa, Mexico - Smithsonian ...

130 UNIVERSITY OF KANSAS PUBLS,, MUS. NAT. HIST.
three (excluding KU 29575, 37631). The frontoparietals are in
contact medially in 23; separated in 115 (excluding KU 29586,
63694).
As a measure of variation in Sceloporus clarkii in Sinaloa, the
total femoral pores and number of dorsal scales were analyzed
statistically for samples from Vaca, El Fuerte, Culiacan, Mazatlan,
and Concepcion. The total femoral pores of the Culiacan and
Mazatlan samples are significantly different from each other and
the other three populations (Fig. 8). The result suggests a possible
VACA 11
EL FUERTE 31
CULIACAN
15 I •=
MAZATLAN 17
CONCEPCION 14
***
f
14 16 18 20 ZZ 24 2$
FIG. 8. Variation in the number of femoral pores in five samples of Sceloporus
clarkii boulengeti in Sinaloa. The horizontal line represents the range of variation;
the vertical line, the mean; the solid rectangle, two standard errors on
either side of the mean; open rectangle, two standard deviations on either side
of the mean. The samples include both sexes.
dine in southern Sinaloa in this character, with a sharp break between
Culiacan and El Fuerte. Some workers might separate
Sinaloan Sceloporus clarkii into two subspecies based on this character.
No significant differences in the number of dorsal scales are
indicated (Fig. 9). Analysis of variation in other characters demonstrates
that there is little or no geographic correlation with variation
of these characters. Our data support Smith's contention
(1939c: 132) that Sceloporus clarkii boulengeri exhibits a wide latitude
of variation.
Tanner and Robison (1959:77), on the basis of three specimens,
described Sceloporus clarkii uriquensis from Urique, Chihuahua.
They diagnosed this subspecies as having the nasal separated from