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

AMPHIBIANS AND REPTILES OF SINALOA, MEXICO 179
1.6 mi. SE Navolato (SU 23886); 11.4 mi. SE Navolato (SU 23901); 0.9 mi. N
Presidio, Rio (SU 23918); 7.1 mi, N Rosario (SU 23926); 7.5 mi. N Rosario
(SU 23925); 4.8 mi. S Rosario (CAS 95753); 7 mi. NW Rosario (SM 10571);
11.7 mi. N San Lorenzo, Rio (SU 23904); 4.2 mi. S San Lorenzo, Rio (SU
23906); 10.8 mi. S San Lorenzo, Rio (SU 23905); 11.1 mi. S San Lorenzo, Rio
(SU 23907); 13,2 mi. S San Lorenzo, Rio (SU 23908); 0.3 mi. E hwy. 15
(Villa Union) on hwy. 40 (SU 23919); 0.5 mi. E hwy. 15 (Villa Uni6n) on
hwy. 40 (SU 23920); 0.7 mi. E hwy. !5 (Vina Union) on hwy. 40 (SU 23921);
3.0 mi. E hwy. 15 (Villa Union) on hwy. 40 (SU 23922); 3.8 mi. E hwy. 15
(Villa Union) on hwy. 40 (SU 23923); 4.3 mi. E hwy. 15 (Villa Union) on
hwy. 40 (SU 23924).
Leptodeira septentrionalis polysticta Giinther
Leptodeira polysticta Giinther, Biologia Centrali-Americana, Reptilia, p.
172, May, 1895 (type locality, Belice, British Honduras).
Leptodeira septentrionalis polysticta: Duellman, Bull. Amer. Mus. Nat.
Hist., 114:72, February 24, 1958.
Remarks.—Two females and one male have 202, 206, 202 ventrals;
96, 83, 109 subcaudals; 21-21-15, 21-24-16, ?-23-15 dorsal scale rows;
3-2, 2-3, 2-2 preoculars; 2-2, 2-2, 2-2 postoculars, 8-8, 8-8, 8-8 supralabials;
10-10 infralabials (LACM 6967 only); 53, 60, 64 dorsal
blotches anterior to vent that extend laterally to dorsal scale rows
8, 5-7, 5-6 and are 1% to 2 scales long; 27, 26, 27 dorsal blotches on
tail that are united distally; a single median nape stripe extends
posteriorly three to four scales from the parietals.
Duellman (1958a: 73) regarded typical polysticta as having body
blotches that are one to three scales long and that extend laterally
to scale rows five to seven. Duellman (1958a: 74) recorded the range
of this species as extending from Nayarit southward along the
Pacific Coast into Middle America. Three specimens were collected
at night north of Mazatlan and represent the first records from
Sinaloa, extending the known range of the species about 250 kilometers.
The specimens are similar in all characters to specimens
from the south and seemlingly continue north-south clinal variation
in numbers of body blotches, ventrals, and midbody scale rows.
Distribution in Sinaloa.—Known only from the southern lowlands.
See Fig. 72.
Specimens examined.—29 km. N Mazatlan (*LACM 6966); 45 km. N
Mazatlan (* LACM 6967); 55 km. N Mazatlan ('LACM 6968).
Leptodeira splendida ephippiata Smith and Tanner
Leptodeira ephippiata Smith and Tanner, Copeia, no. 3:131, September 30,
1944 (type locality, 8.3 miles west-northwest of Alamos, Sonora).
Leptodeira splendida ephippiata: Duellman, Bull. Amer, Mus, Nat. Hist.,
114:82, February 24, 1958.
Remarks.—A specimen of this subspecies from Plomosas has been
referred to Leptodeira bressoni (= L. s. bressoni) by Taylor (1939a: