| Angusticaecinae Skrjabin & Karokhin, 1945 |
| Ascaridae Baird, 1853 |
| Ascaridinae Baird, 1853 |
| Ascaris Linnaeus, 1758 |
| Ascaris boddaertii Baird, 1860 |
| Ascaris cati Schrank, 1788 |
| Ascaris columbae Gmelin, 1790 |
| Ascaris columnaris Leidy, 1856 |
| Ascaris decipiens Krabbe, 1878 |
| Ascaris equorum Goeze, 1782 |
| Ascaris galli Schrank, 1788 |
| Ascaris helicina Molin, 1860 |
| Ascaris hermaphrodita Froelich, 1789 |
| Ascaris leonina von Linstow, 1902 |
| Ascaris lumbricoides Linnaeus, 1758 |
| Ascaris megatyphlon Rudolphi, 1819 |
| Ascaris microcephala Rudolphi, 1809 |
| Ascaris multipapillata Von Drasche, 1882 |
| Ascaris muris Gmelin, 1790 |
| Ascaris obvelata Rudolphi, 1802 |