Scleroglossa is a
clade (evolutionary group) of
lizards that includes
geckos,
autarchoglossans (
scincomorphs,
anguimorphs, and
varanoids), and
amphisbaenians. Scleroglossa is supported by
phylogenetic analyses that use morphological features (visible anatomical features). According to most morphological analyses, Scleroglossa is the
sister group of the clade
Iguania, which includes
iguanas,
chameleons,
agamids, and New World lizards. Together, Scleroglossa and Iguania make up
crown group Squamata, the smallest evolutionary grouping to include all living lizards and snakes.
