Figure 1:

Schematic diagram of snake evolution based on data from Reptile-database.org [16]. Snakes (Serpentes) are divided into 3 main infraorders, Scolecophidia, Henophidia, and Alethinophidia, which together encompass ∼24 families (7 shown here). Families comprising venomous species are indicated with a skull and crossbones symbol. Colubridae constitutes the largest family of snakes, encompassing 52% of the ∼3,566 snake species currently described. The total number of currently described venomous snake species is 2,901, predominantly falling within the families Homalopsidae, Lamprophiidae, Colubridae, Elapidae, and Viperidae. Only snake species that have undergone whole-genome sequencing and assembly are listed in this figure.