Ashworthius Le Roux, 1930 (taxonomy source)
Ashworthius sidemi Schulz, 1933 (taxonomy source)
Camelostrongylus Orloff, 1933 (taxonomy source)
Camelostrongylus mentulatus (Railliet & Henry, 1909) Orloff, 1933 (taxonomy source)
Cooperia Ransom, 1907 (taxonomy source)
Cooperia bisonis Cram, 1925 (taxonomy source)
Cooperia curticei (Giles, 1892) Ransom, 1907 (taxonomy source)
Cooperia mcmasteri Gordon, 1932 (taxonomy source)
Cooperia oncophora (Railliet, 1898) Ransom, 1907 (taxonomy source)
Cooperia pectinata Ransom, 1907 (taxonomy source)
Cooperia punctata (Linstow, 1906) Ransom, 1907 (taxonomy source)
Cooperia zurnabada Antipin, 1931 (taxonomy source)
Epomidiostomum Skryabin, 1915 (taxonomy source)
Epomidiostomum anatinum Skrjabin, 1915 (taxonomy source)
Epomidiostomum orispinum (Molin, 1861) Seurat, 1918 (taxonomy source)
Graphidium Railliet & Henry, 1909 (taxonomy source)
Graphidium strigosum (Dujardin, 1846) Railliet & Henry, 1909 (taxonomy source)
Haemonchus Cobb, 1898 (taxonomy source)
Hyostrongylus Hall, 1921 (taxonomy source)
Hyostrongylus rubidus (Hassal & Stiles, 1892) Hall, 1921 (taxonomy source)
Libyostrongylus Lane, 1923 (taxonomy source)
Libyostrongylus douglassii (Cobbold, 1882) Lane, 1923 (taxonomy source)
Longistrongylus Le Roux, 1931 (taxonomy source)
Marshallagia Orloff, 1933 (taxonomy source)
Marshallagia marshalli (Ransom, 1907) Orloff, 1933 (taxonomy source)
Molineus Cameron, 1923 (taxonomy source)
Molineus patens (Dujardin, 1845) Petrow, 1928 (taxonomy source)
Molinostrongylus Skarbilovitch, 1934 (taxonomy source)
Molinostrongylus alatus (Ortlepp, 1932) Skarbilovitsch, 1934 (taxonomy source)
Molinostrongylus ornatus (Mönnig, 1927) Travassos, 1937 (taxonomy source)
Molinostrongylus skrjabini Skarbilovitsch, 1934 (taxonomy source)
Molinostrongylus tipula (Beneden, 1873) Travassos, 1937 (taxonomy source)
Nematodirella Yorke & Maplestone, 1926 (taxonomy source)
Nematodirella longissimespiculatus (Romanovitsch, 1915) Skrjabin & Schikhobalova, 1952 (taxonomy source)
Nematodirus Ransom, 1907 (taxonomy source)
Nematodirus aspinosus Schulz, 1931 (taxonomy source)
Nematodirus davtiani Grigorian, 1949 (taxonomy source)
Nematodirus helvetianus May, 1920 (taxonomy source)
Nematodirus roscidus Railliet, 1911 (taxonomy source)
Nematodirus skrjabini Mizkewitsch, 1929 (taxonomy source)
Obeliscoides Grabyill, 1924 (taxonomy source)
Obeliscoides cuniculi (Graybill, 1923) Graybill, 1924 (taxonomy source)
Ornithostrongylus Travassos, 1914 (taxonomy source)
Ornithostrongylus hastatus (Linstow, 1905) Travassos, 1918 (taxonomy source)
Ornithostrongylus papillatus (Linstow, 1882) Travassos, 1918 (taxonomy source)
Ornithostrongylus quadriradiatus (Stevenson, 1904) Travassos, 1914 (taxonomy source)
Ostertagia Ransom, 1907 (taxonomy source)
Ostertagia (Costarcuata) Schulz & Kadenazii, 1950 (taxonomy source)
Ostertagia (Grosspiculagia) Orloff, 1933 (taxonomy source)
Ostertagia (Grosspiculagia) arctica Mitzkewitsch, 1929 (taxonomy source)
Ostertagia (Grosspiculagia) lasensis Assadov, 1953 (taxonomy source)
Ostertagia (Grosspiculagia) nemorhaedi Schulz & Kadenazii, 1950 (taxonomy source)
Ostertagia (Grosspiculagia) volgaensis Tomskich, 1938 (taxonomy source)
Ostertagia (Ostertagia) (Ransom, 1907) (taxonomy source)
Ostertagia (Ostertagia) antipini Matschulski, 1950 (taxonomy source)
Ostertagia (Ostertagia) buriatica Konstantinova, 1934 (taxonomy source)
Ostertagia (Ostertagia) kolchida Popowa, 1937 (taxonomy source)
Ostertagia (Ostertagia) leptospicularis Assadov, 1953 (taxonomy source)
Ostertagia (Ostertagia) mossi Dikmans, 1931 (taxonomy source)
Ostertagia (Ostertagia) orloffi Sankin, 1930 (taxonomy source)
Oswaldocruzia Travassos, 1917 (taxonomy source)
Oswaldocruzia bialata (Molin, 1860) Travassos, 1917 (taxonomy source)
Oswaldocruzia iwanitzkyi Sudarikov, 1951 (taxonomy source)
Oswaldocruzia skrjabini Travassos, 1937 (taxonomy source)
Oswaldocruzia ukrainae Iwanitzky, 1928 (taxonomy source)
Pseudamidostomum Boulenger, 1926 (taxonomy source)
Spiculopteragia Orloff, 1933 (taxonomy source)
Spiculopteragia boehmi (Gebauer, 1932) Orloff, 1933 (taxonomy source)
Spiculopteragia mathevossjani Ruchljadev, 1948 (taxonomy source)
Spiculopteragia schulzi (Rajewskaja, 1930) Orloff, 1933 (taxonomy source)
Spiculopteragia spiculoptera (Guschanskaja, 1931) Orloff, 1933 (taxonomy source)
Strongylus douglassii Cobbold, 1882 (taxonomy source)
Strongylus uncinatum Lundahl, 1848 (taxonomy source)
Travassosius Khalil, 1922 (taxonomy source)
Travassosius rufus Khalil, 1922 (taxonomy source)
Trichostrongylus Looss, 1905 (taxonomy source)
Trichostrongylus axei (Cobbold, 1879) Railliet & Henry, 1909 (taxonomy source)
Trichostrongylus calcaratus Ransom, 1911 (taxonomy source)
Trichostrongylus capricola Ransom, 1907 (taxonomy source)
Trichostrongylus colubriformis (Giles, 1892) Ransom, 1911 (taxonomy source)
Trichostrongylus medius Oliger, 1952 (taxonomy source)
Trichostrongylus pietersei Le Roux, 1932 (taxonomy source)
Trichostrongylus probolurus (Railliet, 1896) Looss, 1905 (taxonomy source)
Trichostrongylus retortaeformis (Zeder, 1800) Looss, 1905 (taxonomy source)
Trichostrongylus skrjabini Kalantarian, 1928 (taxonomy source)
Trichostrongylus suis Iwanitzky, 1930 (taxonomy source)
Trichostrongylus tenuis (Mehlis, 1846) Railliet & Henry, 1909 (taxonomy source)
Trichostrongylus ventricosus (Rudolphi, 1809) Travassos, 1918 (taxonomy source)
Trichostrongylus vitrinus Looss, 1905 (taxonomy source)