2018animal_genitaliaanthroclawscloacadilophosauriddilophosaurusdinosaurerectionfrill_(anatomy)genitalshead_cresthead_frillhi_resmalemembrane_(anatomy)membranous_frillnudeopen_mouthorange_eyespenisprehistoric_speciesreptilerunningsaurischianscaliesolotheropodtoe_clawsyaroul