highly significantp < 0.0001
When lineages were partitioned into four groups (background, fossorial, limbless, and limbless-fossorial), the differences remained highly significant when all genes were analyzed together (p < 0.0001; see Table S3 ).
When lineages were partitioned into four groups (background, fossorial, limbless, and limbless-fossorial), the differences remained highly significant when all genes were analyzed together (p < 0.0001; see Table S3 ).