Cylicostephanus minutus
(Yorke and Macfie, 1918) Cram, 1924

Figures

Synonyms: Cylicostomum minutum Yorke and Macfie, 1918; Trichonema minutum (Yorke and Macfie, 1918) LeRoux, 1924; Erschowinema minutum (Yorke and Macfie, 1918) Tshoijo, 1957 Cylicostomum calicatum minus Kotlan, 1920

General: Tip of submedian papillae spindle-shaped, 2-3 times as long as thick. ELC with8 elements; ILC with 18-22. Insertion for ELC on tips of elements of ILC. Tips of elements of ILC rounded. Insertion for ILC on anterior edge of BC. Septum intracoronare origin placed on support. Walls BC are straight, thicker posteriorly. Buccal cavity deeper than wide. Dorsal gutter elongate, more than 1/2 depth of BC.

Male: Body length 4.0-5.2 mm. Esophagus length 270-388. BC width 18-24; depth 24-27. Spicule length 515-672. Gubernaculum large, with dorsal handle and ventral notch; length 92-110. Dorsal ray length 140-170. Ventral rays length equal to laterals. Dermal collar well developed on ventral side of genital cone. Appendages of genital cone paired, long, fingershaped appendages, bifurcated distally, proximaly fused in semispherical mass.

Female: Body length 4.6-6.8 mm. Esophagus length 284-382. BC width 22-28; depth 26-30. Vulva to tail tip 100-187. Anus to tail tip 54-120. Egg size 53-60 x 34-37. Tail conical. Infundibulum longer than sphincter.

Hosts: Equus caballus, E. asinus, E. caballus x E. asinus, E. przewalskii, E. hemionus.

Locality: cecum, colon.

Distribution: cosmopolitan.