Evolution and systematics

There are no fossils definitely assignable to this family and hence there is no evidence of its geological age. Molecular and morphological data suggest that cylindrophiids are distantly related to other basal alethinophidians (uropeltids, aniliids) as well as to basal macrostomatans. Current phylo-genies place cylindrophiids near uropeltids and aniliids. No subfamilies are recognized.

meet the supralabial scales), nostril located within a single nasal scale, 17-23 dorsal scale rows (most species have 19, 21, or 23; the most recently described species from Sarawak, Borneo, C. engkariensis, has 17 scale rows, the same number found in anomochilids), short tails (five to seven subcaudals), and a

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