Thamnophis postremus SMITH, 1942
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: Tepalcatepec Valley Gartersnake S: Jarretera de Tepalcatepec |
Synonym | Thamnophis eques postremus SMITH 1942: 109 Thamnophis eques postremus — SCHMIDT 1947 Thamnophis cyrtopsis postremus — SMITH 1951: 140 Thamnophis postremus — ROSSMAN et al. 1996 Thamnophis postremus — DE QUEIROZ et al. 2002 Thamnophis postremus — LINER 2007 Thamnophis postremus — WALLACH et al. 2014: 724 |
Distribution | Mexico (Michoacan) Type locality: El Sabino, Michoacan. |
Reproduction | ovoviviparous. |
Types | Holotype: FMNH 120235 (was EHT-HMS 5275, H.M. Smith). Collected by: E. H. Taylor and H.M. Smith. Paratypes: (n=3) FMNH 5274, 5285-6, all females, from Uruapan, Michoacan. |
Diagnosis | Diagnosis. Similar to e. eques, except ventrals fewer, 138 to 141 in the only specimens known (4 females); caudals 71 to 72; supralabials 7 to 8; lateral light stripes not apparent; middorsal stripe but very little lighter than ground color, scarcely or not evident; dark spots very much reduced, al ternating with each other in two series on either side; middorsum not traversed by spots; outer row of dark spots on first and second scale rows greatly reduced, generally scarcely visible; no distinct dark spots on venter. (Smith 1942: 109). DEFINITION. “There is a black nuchal collar. The vertebral stripe is indistinct, usually not extending on tail. Pale brown dorsolateral areas have a contrasting pattern of relatively small, dark alternating blotches extending the length of the body. The first three scale rows are pale, mostly unicolor, but often have scattered, small black flecks. Black supralabial markings are well developed, with a characteristic large comma or thorn-shaped mark on the next to last suture. Seven supralabials (60%) are more frequent than eight (37%). There is often more than one black mark on the infralabial sutures. Small, paired black spots usually occur laterally on ventrals. Ventral scales (males, mean 146, range 142-151; females, 140, 136-142) are the fewest of any subspecies.” (Webb 1980) |
Comment | |
References |
|
External links |