Cyathostomum pateratum
(Yorke and Macfie, 1919) K'ung, 1964

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Synonyms: Cylicostomum pateratum Yorke and Macfie, 1919; Trichonema pateratum (Yorke and Macfie, 1919) LeRoux, 1924; Cylicocercus pateratus (Yorke and Macfie, 1919) Cram, 1924; Cylicodontophorus pateratus (Yorke and Macfie, 1919) Ershov, 1939; Cylicostomum cymatostomum Kotlan, 1919.

General: ELC with20-24 elements; ILC with 40. Insertion point for posterior ends of elements of ILC about 1/2 of BC depth. Line formed by insertion of elements of ILC is sinusous. Anterior deirids near middle of glandular esophagus, 300-502 from anterior end.

Male: Body length 8-11 mm. Esophagus length 540-662. BC width 128-136, depth 38-46. Spicules length 1.67-1.86 mm. Gubernaculum length 200-297. Dorsal ray length (from distal tip to origin of externodorsal ray) 391-420. Ventral rays markedly shorter than laterals. Dermal collar well developed on ventral side of genital cone. Appendages of genital cone inconstant. Studied specimens have number of oval protrusions similar with such of C. catinatum. Protrusions of dermal collar absent.

Female: Body length 8.4-13.0 mm. Esophagus length 620-770. BC width 100-140; depth 32-40. Vagina length 360-400. Vulva to tail tip 220-283. Anus to tail tip 105-140. Egg size 90-100x400-450.

Hosts: Equus caballus, E. asinus, E. caballus X E. asinus, E. przewalskii, E. hemionus, E. burchelli

Locality: cecum, colon.

Distribution: cosmopolitan.