C. auriculatus (Looss, 1900) Ershov, 1943

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Synonyms: Cyathostomum auriculatum Looss, 1900; Cylichnostomum auriculatum (Looss, 1900) Looss, 1902; Cylicostomum auriculatum (Looss, 1900) Gedoelst, 1903; Trichonema auriculatum (Looss, 1900) LeRoux, 1924

General: Posterior edge of MC situated at anterior edge of BC. Dorsal and ventral notches on mouth collar absent. Amphids extremely long, earlike or hornlike, extend much higher than mouth collar and submedian papillae.. Tip of submedian papillae tip very long, uniform thickness, about 4 or more times as long as thick. Stalk of submedian papillae shorter than broad. ELC consists 42 elements which longer than numerous ILC elements. Elements of ELC longer than broad. Tips of elements of ILC pointed. Insertion point for posterior ends of elements of ILC on anterior edge of buccal capsule. Walls BC are straight with posterior ring. Buccal cavity concave. Dorsal gutter button-like. Esophageal funnel moderately enlarged. Excretory pore and anterior deirids posterior to EI. Esophagointestinal valve not elongated.

Male: Body length 15-17 mm. Esophagus length 0.950-1.1 mm. BC width 137-160, depth 64-75. Spicules length 1.80-2.17 mm. Gubernaculum length 323-341. Dorsal ray length 652-900. Ventral rays length equal to laterals. Dermal collar well developed on ventral side of genital cone. Appendages of genital cone oval with blunt end. Protrusions of dermal collar absent.

Female: Body length 26 mm, length of esophagus 1.15-1.28 mm, width of BC 146-168, depth 72-78, distance from vulva to anus 130-190, from anus to tail tip 70-100, vagina length 1.7-1.9, egg size 86-90?44-48. Tail of adult females curved dorsally under right angle.

Hosts: Equus caballus, E. asinus, E. burchelli, E. zebra.

Locality: cecum, colon.

Distribution: Asia, Africa.