Coronocyclus labratus (Looss, 1900) Hartwich, 1986

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Synonyms: Cyathostomum labratum Looss, 1900; Cylichnostomum labratum (Looss, 1900) Looss, 1902; Cylicostomum labratum (Looss, 1900) Gedoelst, 1903; Trichonema labratum (Looss, 1900) Le-Roux, 1924; Cylicostomias labrata (Looss, 1900) Cram, 1925; Schulzitrichonema labratum (Looss, 1900) Barus, 1962

General: Mouth collar not prominent. Tip of submedian papillae bullet-shaped. ELC with18 elements; ILC with48-54. Support for ELC elongate,thin, pyriform with thicker distal end. Buccal capsule wall without medial bend near middle. BC lateral walls thickest near middle of cylinder, ventral wall slightly thicker posteriorly. Tongue-like dorsal gutter smaller than dorsal esophageal tooth. Dorsal esophageal tooth prominent. Anterior deirids and excretory pore 240-280 from anterior end.

Male: Body length 5.4-8.0 mm. Esophagus length 336-401. BC depth 20-26; width 44-52. Spicule length 832-1120. Gubernaculum length 120-132. Dorsal ray length (from distal tip to origin of externodorsal ray) 330-387. Dermal collar well-developed on ventral side of genital cone. Appendages of genital cone paired, pear-shaped, fused medially. Protrusions of dermal collar absent.

Female: Body length 7.3-9.5 mm. Esophagus length 400. BC depth 20-26; width 44-52.Vulva to tail tip 188. Anus to tail tip 71-96. Egg size 39-44 x 93-98. {64-80x132-140}. Tail straight, with thickened cuticle. Vagina longer than sphincter of ovejector. Infundibulum longer than sphincter.

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

Locality: cecum, colon.

Distribution: cosmopolitan.