Ascarididae is a family of the large intestinal roundworms. Members of the family are intestinal parasites infect all classes of vertebrates.". It includes a number genera, the most well known of which are Amplicaecum Angusticaecum Ascaris Baylisascaris Crossophorus Dujardinascaris Hexametra Lagaochilascaris Ophidascaris Parascaris Polydelphis Seuratascaris Toxascaris Toxocara Travassoascaris