Thamnophis ahumadai GRÜNWALD, MENDOZA-PORTILLA, GRÜNWALD, MONTAÑO-RUVALCABA, FRANZ-CHÁVEZ, GARCÍA-VÁZQUEZ & REYES-VELASCO, 2024
Can you confirm these amateur observations of Thamnophis ahumadai?
Thamnophis ahumadai
We have no photos, try to find some by Google images search: 
| Higher Taxa | Colubridae (Natricinae), Colubroidea, Caenophidia, Alethinophidia, Serpentes, Squamata (snakes) |
| Subspecies | |
| Common Names | E: Ahumada’s Alpine Garter Snake. Spanish: Culebra Listonada de Montaña de Ahumada |
| Synonym | Thamnophis ahumadai GRÜNWALD, MENDOZA-PORTILLA, GRÜNWALD, MONTAÑO-RUVALCABA, FRANZ-CHÁVEZ, GARCÍA-VÁZQUEZ & REYES-VELASCO 2024: 162 |
| Distribution | Mexico (Jalisco) Type locality: under a log in a marshy meadow near a pond, 2.8 km E of Cumbre de Guadalupe, Municipio de Cuautla, Jalisco, Mexico (20.168991, -104.684925, 2,353 m elevation; datum = WGS84) |
| Reproduction | |
| Types | Holotype: INIRENA 2933, Adult male (original field number CIG-1612), (Fig. 2 in Gründwald et al. 2024). Collected by Christoph I. Grünwald, María del Carmen G. Mendoza-Portilla, Iván Ahumada-Carrillo, and Ginny N. Weatherman on 23 August 2019. Paratypes (Fig. 3). MZFZ 4593 (original field number CIG-0500) adult male collected under a rock on a hillside above a stream at Cumbre de Guadalupe, Municipio de Talpa de Allende, Jalisco, Mexico (20.168902, -104.711252, 2,137 m asl; datum = WGS84) by Christoph I. Grünwald, Héctor Franz-Chávez, André J. Grünwald, Ámbar Lanomy Grünwald, Janelle Morales-Flores, and Karen I. Morales-Flores on 11 July 2015. MZFZ 4594 (original field number CIG-1609) adult female collected under trash in a grassy meadow amongst pine forest, 1.5 km N of Cumbre de Guadalupe, Municipio de Talpa de Allende, Jalisco, Mexico (20.186581, -104.716188, 2,179 m asl; datum = WGS84), by Christoph I. Grünwald, María del Carmen G. Mendoza-Portilla, Iván Ahumada-Carrillo, and Ginny N. Weatherman on 23 August 2019. INIRENA 2932 and 2934 (original field numbers CIG-1611 and CIG-1613) adult male and adult female, respectively, with the same collection data as Holotype. MZFZ 4595 (original field number CIG-1610) adult male collected under rock in meadow, 4.2 km airline ESE of Cumbre de Guadalupe, Municipio de Tomatlán, Jalisco, Mexico (20.157217, -104.675059, 2,319 m asl; datum = WGS84), by Christoph I. Grünwald, María del Carmen G. Mendoza-Portilla, Iván Ahumada-Carrillo, and Ginny N. Weatherman on 23 August 2019. INIRENA 2935–36 (original field number CIG-1700–01) 2 adult males, collected under logs at a large pond at 2.5 km SE of Atemajac de Brizuela, Municipio de Atemajac de Brizuela, Jalisco, Mexico (20.1151, -103.7036, 2,422 m asl; datum = WGS84; Fig. 4b), by Christoph I. Grünwald, André J. Grünwald, and Ámbar Lanomy Grünwald on 21 June 2020. |
| Diagnosis | Diagnosis: A relatively small Garter Snake, with a maximum of 565 mm SVL and 705 TotL; head narrow, scarcely wider than neck, with a short muzzle (INK + PFK = 3.0 mm); tail long in length, 31–36% of SVL and 23–27% of TotLin males, 25–26% of SVL and 20–21% of TotLin females; internasals wider than long; frontal 2–2.25 times longer than wide; loreal slightly longer than wide; one preocular; 2–4 postoculars; temporals 1 + 2; 7 supralabials, third and fourth entering orbit; 9–10 infralabials, first four in contact with anterior chinshields; anterior chinshields shorter than posterior. Dorsal scales always in 19-17-17 rows, strongly keeled except for the outermost row, which is smooth; ventral scales in males 134–142, in females 139–141; subcaudals in males 61–69, in females 54–55; anal scale undivided. Dorsal pattern consists of a pale mid-vertebral stripe restricted to the mid-dorsal row and a pale lateral stripe on second scale row. One or two rows of dark brown or black dorso-lateral spots, usually in one row on the anterior third of the dorsum, then divided into two rows along the remaining posterior two thirds. Ventral coloration dark, pale anteriorly, becoming progressively darker until dark gray or black posteriorly. (Grünwald et al. 2024) |
| Comment | |
| References |
|
| External links |