part of part of attached to attached to caudal vertebra muscle organ caudal region iliac crest extrinsic post-anal tail muscle iliocaudalis muscle M. iliocaudalis A muscle that attaches to the iliac crest and to a caudal vertebra. iliocaudalis In anolis, This muscle lies deep to the m. extensor caudae medialis and originates via fleshy fibers from the iliac crest (Fig. 3A,B). It inserts via fleshy fibers onto the horizontal intramuscular septum as well as the chevron bones and dorsal aspect of the transverse processes of Ca3-6 or 7. The fibers of m. iliocaudalis are noticeably bipennate[PMID:22753107] UBERON:0035097