Children (7 direct children, 9 direct and indirect children):
Trimorphodon biscutatus
Trimorphodon biscutatus vilkinsonii
Texas lyre snake
Trimorphodon lyrophanes
Trimorphodon paucimaculatus
Trimorphodon lambda
Trimorphodon quadruplex
Central american lyre snake
Trimorphodon tau
(tree size 2)
Mexican lyre snake