EntityQ389306· pop 7· linked from 20 articlesPelvic spurSign in to savemodified reptilian appendagesConnectionssnakeEntityLacertiliaEntitydigital object identifierEntityPatagoniaEntityNew WorldEntityalbinismEntitysexual dimorphismEntitygreen anacondaEntityJSTOROrganizationBoa constrictorEntityperpendicularityEntitycloacaEntityPython molurusEntityvestigial structureEntityBurmese pythonEntityLate CretaceousEntityCylindrophisEntityAlethinophidiaEntityScolecophidiaEntityAnomalepididaeEntityCategoriesSnake anatomy