The Iberian worm lizard or European worm lizard (Blanus cinereus) is a species of reptile in the family Blanidae (worm lizards) of the suborder Amphisbaenidae. There are 130 species of amphisbaenians, most found in Spain, Africa, South Africa, and the Caribbean islands. The Iberian worm lizard is locally known as cobra-cega (Portuguese), culebrilla ciega (Spanish), and colobreta cega (Catalan), all meaning "blind snake". Recent studies into the mitochondrial and nuclear genomic data of 47 isolated B. cinereus populations show rather large sequence divergence between two apparent clades, leading some researchers to call for a division of the Iberian worm lizard into two species. While little is known of B. cinereus in comparison with some other reptile species, new insight is growing about