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

AMPHIBIANS AND REPTILES OF SINALOA, MEXICO 125
on the floodplain of the Rio Fuerte north of Los Mochis. Nine
females have the following characters: supralabials 7-10 (mode 8);
infralabials 8-9 (mode 9); total femoral pores 36-45 (40,5); snoutvent
length 85-118 (104). Five males have the following characters:
supralabials 8-10 (mode 8); infralabials 8-10 (mode 9); total femoral
pores 40-41 (40.6); snout-vent length 88-135 (113). Most
specimens have one row of small scales separating the nasal and
rostral. The two largest males (snout-vent length 130, 135 mm.)
have two rows of small scales between the nasal and rostral. The
specimens agree closely in color pattern with the original description
and with specimens at hand from the vicinity of the type locality.
Distribution in Sinaloa.—Known only from the floodplain of the
Rio Fuerte in the northern lowlands. See Fig. 42.
Specimens examined.—Ahome (°LACM 8646); 4 mi. N Los Mochis turnofi
(* LACM 25716-26); San Miguel, Rio del Fuerte, 110 m. (" KU 40448);
2.5 km. N Topolobampo ("CSCLB 1521).
Literature record.—Ahome (Bogert and Oliver, 1945:401).
Additional records.—1 mi. NE Ahome, S bank Rio Fuerte (UAZ 9525);
22 mi. NNE Los Mochis (UIMNH 40427); 2.6 mi. SE Playa Visnaga (UAZ
9523).
Holbrookia maculata elegans Rocourt
Holbrookia elegans Bocourt, Mission scientifique au Mexique . , ., Etudes
sur les reptiles, livr, 3:164, pi. 17 bis, figs. 8, 8a, 1874 (type locality,
Mazatlan, Sinaloa).
Holbrookia maculata elegans: Smith and Taylor, Bull, U. S. Nat. Mus.,
199:84, October 26, 1950.
Remarks.—Smith (1935b: 192) characterized specimens of Holbrookia
maculata elegans from southern Sinaloa as having tails
shorter than the body (longer in specimens from Sonora), larger
femoral pores, pink gular spots and more strongly angular and
conspicuous dorsal spots in females, and very little blue surrounding
the lateral black spots of males. Lewis and Johnson (1956:278)
reported females from between Culiacan and Mazatlan as having
relatively smaller femoral pores, pink chin coloration in only one,
and bright blue-green bordering the lateral black bars of males.
Twenty-seven males from Sinaloa have the following measurements:
dorsal scales from parietal to posterior edge of femur 138-158
(146.2); total femoral pores 22-31 (27.4); lamellae beneath fourth
toe 21-30 (25.1); ventrals from gular fold to anus 58-76 (65.2);
snout-vent length 27-66 (48.2); tail length 25-88 (53.0); snout-vent/
tail 0.78-1.08 (0.92). Comparable measurements for 18 females are
respectively: 139-157 (146.9); 17-33 (25.7); 22-28 (24.7); 57-71
(65.9); 29-61 (50.4); 29-60 (49.2); 0.91-1.03 (0.98). Specimens