Cyathostomum catinatum Looss, 1900

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Synonyms: Cylichnostomum catinatum (Looss, 1900) Looss, 1902; Cylicostomum catinatum (Looss, 1900) Gedoelst, 1903; Trichonema catinatum (Looss, 1900) LeRoux, 1924; Cylicocercus catinatum (Looss, 1900) Cram, 1924; Erschowinema catinatum (Looss, 1900) Tshoijo, 1957; Cylicostomum pseudocatinatum Yorke and Macfie, 1919; Cylicostomum catinatum litoraureum Yorke and Macfie, 1920; Cylicostomum catinatum lopezneyrai Lizcano Herrera, 1951.

General: ELC with 18-22 elements; ILC 30-40. ILC inserted in convex line in lateral view. Junction of support (S) for ELC and wall of buccal capsule (BC) marked by narrow constriction. S much smaller than wall of BC. Anterior deirids near middle of glandular esophagus, 210-229 from anterior end.

Male: Body length 4.0-8.6 mm. Esophagus length 310-360. BC width 40-58; depth 19-26. Spicules length 1.12-1.52 mm,. Gubernaculum length 180-208. Dorsal ray length (from distal tip to origin of externodorsal ray) 315-377. Ventral rays length equal to laterals. Dermal collar well developed on ventral side of genital cone. Appendages of genital cone inconsistant. Studied specimens have two fingerlike protrusions. Protrusions of dermal collar absent.

Female: Body length 4.89-9.8 mm. Esophagus length 380-451. BC width 40-68; depth 20-29. Vulva to tail tip 98-195. Anus to tail tip 75-110. Egg size 95-105 x 44-48.

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

Locality: cecum, colon.

Distribution: cosmopolitan.

Notes for Discussion. (but 0.61 mm for C. pseudocatinatum (Skrjabin, Erschow, 1933)