Main differences between Vipera latastei latastei and Vipera latastei gaditana
1- Ground colour; lighter and less variable in
V. l. gaditana.
Vipera latastei gaditana, Doñana (Huelva)
photo: Daniel Gómez
Vipera latastei latastei, Guadalajara
photo: Daniel Gómez
2- Number of jags in the zigzag pattern; Vipera latastei gaditana hardly ever surpasses 35 while
Vipera latastei latastei commonly exceeds 40.
3- Number of ventrals; lower for
Vipera l. gaditana, with an average of 132, the average for
Vipera l. latastei is 136,5.
4- Number of subcaudals; higher for
Vipera l. gaditana, mostly in the males.
5- Head; broader, with a higher number of scales and with less ornamentation in
Vipera latastei gaditana. The frontal scale is very rarely seen in
V. l. gaditana.
6- Head colour; in
Vipera l. gaditana it is grey, while in
Vipera l. latastei it resembles the body ground colour.
7- Horn; larger and with a more complex constitution in
Vipera l. gaditana.
8- Supralabials; the small dark triangular markings on the upper labials of the males of the nominate form are usually absent in
Vipera l. gaditana.
9- Behaviour; Vipera latastei gaditana is noticeably more aggressive than
Vipera latastei latastei.
10- Venom; the venom from
Vipera l. gaditana is less toxic than that of
Vipera l. latastei.