A Taxonomic Study of the Middle American Snake, Pituophis deppei — John Shaqi
A Taxonomic Study of the Middle American Snake, Pituophis deppeiDuellman, William Edward
Science
A Taxonomic Study of the Middle American Snake, Pituophis deppei
Duellman, William Edward
Snakes -- Latin America
The specimen from Párajo Verde, Veracruz, was considered to be an
intergrade between _P. deppei_ and _P. lineaticollis_ by Smith (1943:
461), who stated that, although the snake had 231 ventrals and dark
lateral streaks as does _deppei_, it had light-centered dorsal blotches
and stripes on the neck as does _lineaticollis_. This specimen (USNM
110892) has a high number of ventrals for _deppei_; one from Jalisco has
232, and one each from Guanajuato and Veracruz have 229. The blotches
posteriorly are lighter than those anteriorly and are slightly lighter
in the center than at the periphery. Two anterior blotches are divided
medially and narrowly connected by black streaks. Although these are
somewhat suggestive of the pattern of _lineaticollis_, they are more
nearly like that of _deppei_. Four other specimens from the same area
are typically _deppei_. There is some doubt as to the actual provenance
of the snake stated to have come from Párajo Verde, for, according to
Smith (1943: 460), the snake had been tied to a truck and dragged
halfway down the slopes of the Cumbres de Acultzingo, where he found it.
He surmised that it probably was dragged no farther than the settlement,
Párajo Verde, at the Cumbres de Acultzingo.
Fugler and Webb (1956: 171) commented on the uniformly brown dorsum of a
specimen (KU 39564) from 16 miles east and 18 miles north of Ocampo,
Coahuila. It has a higher number of ventrals (242) and caudals (88) than
is known for deppei. It is, without a doubt, a _Pituophis_. It is not
_Pituophis catenifer_, as attested to by the presence of only two
prefrontals. The high number of ventrals and caudals, together with the
uniform dark brown dorsum, provide a combination of characters
indicating that this specimen may represent an undescribed species in
the _deppei_ group of _Pituophis_.
_Distribution._--Southern Chihuahua and southern Coahuila southward on
the western and central parts of the Mexican Plateau to the Valley of
México and to southeastern Puebla and adjacent Veracruz.
Public-domain text, read in full here on John Shaqi.
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