Ostertagia

Ostertagia is a genus of nematodes belonging to the family Trichostrongylidae.

The genus has cosmopolitan distribution.

Species:
 * Ostertagia antipini Matschulsky, 1950
 * Ostertagia arctica Mitzkewisch, 1929
 * Ostertagia buriatica Konstantinowa, 1933
 * Ostertagia dahurica Orloff, Belowa & Gnedina, 1931
 * Ostertagia drozdzi Jancev, 1977
 * Ostertagia gruehneri Skrjabin, 1929
 * Ostertagia kolchida Popova, 1937
 * Ostertagia lasensis Asadov, 1953
 * Ostertagia leptospicularis Asadov, 1953
 * Ostertagia lyrataeformis (Drozdz, 1965)
 * Ostertagia mossi Dikmans, 1931
 * Ostertagia murmani Tachistov, 1940
 * Ostertagia nemorhaedi Schults & Kadenatsii, 1950
 * Ostertagia orloffi Sankin, 1930
 * Ostertagia ostertagi (Stiles, 1892)
 * Ostertagia skrjabini (Schulz, Andreeva & Kadenatsii, 1954)
 * Ostertagia trifurcata Ransom, 1907
 * Ostertagia volgaensis Tomskich, 1938