First Case Report of an Unusual Echis genus (Squamata: Ophidia: Viperidae) Body Pattern Design in Iran

Three families of venomous snakes exist in Iran including Viperidae, Elapidae, and Hydrophidae. Viperidae family is the only family with a widespread distribution. Saw-scaled vipers are important poisonous snakes in Asia and Africa. This name is given to this snake due to the presence of obliquely keeled and serrated lateral body scales. Distribution of this genera is mostly reported in the central and southern regions of Iran. This genus has four main clades: the Echis carinatus, E. coloratus, E. ocellatus, and E. pyramidum. Design pattern in Echis species plays an important role in camouflage and variety of habitat. In the present report, we investigated a specimen from the eastern region of Iran; we examined ۲۵ specimens of Echis that were collected from the eastern region of our country. Among them, only one specimen with a different pattern was found compared with the other ۲۴ specimens by surveying meristic, mensural, and design pattern characters using valid key identifiers. The similarities between the specific Echis with a different pattern and other ۲۴ specimens were also studied and compared. The results of this investigation clearly showed that although the pattern of the lateral white line and block on dorsal body of the specific Echis snake was different, since the meristic and mensural characters were similar to other Echis snakes it can be concluded that this specimen is not a different species; the difference in these patterns may be due to a minor genetic mutation of that specimen. It is the first case report of Echis carinatus sochureki Stemmler, ۱۹۶۹ from Iran with a different pattern.

Keywords:

Echis , Design pattern , Viperidae , Iran