A New Subspecies of Lizard, Cnemidophorus sacki, from Michoacán, México

by William Edward Duellman

[A] Data for C. sacki occidentalis in Tables 1-3 are from Zweifel (1959, Bull. Amer. Mus. Nat. Hist., 117: tables 1-3).

Table 2.—Variation in the Number of Femoral Pores
in Three Subspecies of Cnemidophorus sacki

Key for Table:
No. = Number of Specimens	SD = Standard Deviation
SE = Standard Error	C/V = Coefficient of Variation

Population	No.	Range	Mean	SD	SE	C/V
sacki sacki
Entire Sample	106	32-44	36.2	2.42	0.25	2.28
Puebla: Tehuitzingo	22	33-41	36.7	2.36	0.50	6.43
Guerrero: Chilpancingo	23	32-39	35.7	2.15	0.45	6.02
Guerrero: Mexcala	22	33-44	37.5	2.59	0.55	6.91
Morelos	39	32-40	35.4	2.19	0.35	6.18
sacki zweifeli
Entire Sample	189	32-49	41.1	2.77	0.20	1.46
Michoacán: Tafetan	19	33-43	38.1	2.61	0.60	6.85
Michoacán: Apatzingán	170	2-49	41.4	2.58	0.62	1.52
sacki occidentalis	67	32-45	38.8	2.46	0.30	3.67

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Table 3.—Ratio of Number of Granules Separating Paravertebral Stripes to Granules Abound Midbody (PV/GAB) in Three Subspecies of Cnemidophorus sacki

Key for Table:
No. = Number of Specimens	SD = Standard Deviation
SE = Standard Error	C/V = Coefficient of Variation

Population	No.	Range	Mean	SD	SE	C/V
sacki sacki
Entire Sample	72	0.101-0.205	0.154	0.052	0.006	0.073
Puebla: Tehuitzingo	12	0.140-0.205	0.169	0.052	0.015	0.433
Guerrero: Chilpancingo	16	0.120-0.192	0.157	0.021	0.005	0.131
Guerrero: Mexcala	21	0.142-0.180	0.159	0.031	0.007	0.147
Morelos	23	0.101-0.180	0.137	0.023	0.005	0.100
sacki zweifeli
Entire Sample	105	0.064-0.157	0.097	0.070	0.007	0.067
Michoacán: Tafetan	21	0.103-0.157	0.128	0.039	0.009	0.186
Michoacán: Apatzingán	84	0.064-0.126	0.089	0.051	0.005	0.060
sacki occidentalis	50	0.086-0.183	0.130	0.021	0.003	0.042

From the geographically adjacent populations of sacki (sacki and occidentalis), zweifeli differs in coloration and scutellation (see Tables I-III). Cnemidophorus sacki sacki has a dorsal pattern in adult males of dark brown cross-bars on a tan ground-color. Both occidentalis and zweifeli have variable, diffuse color patterns in large adults, but zweifeli differs from occidentalis in having a blue spot on the pink throat.