Cylicostephanus longibursatus
(Yorke et Macfie, 1918) Cram, 1924

Figures

Synonyms: Cylicostomum longibursatum Yorke and Macfie, 1918; Trichonema longibursatum (Yorke and Macfie, 1918) LeRoux, 1924; Cylicostomum nanum Ihle, 1919; Cylicostomum calicatiforme Kotlan, 1919.

General: Tip of submedian papillae cone-shaped, 2-3 times as long as thick. ELC has same number elements (14-18) as ILC. Insertion for ELC slightly back from tips of elements of ILC. Tips of elements of ILC pointed. Insertion point for posterior ends of elements of ILC at 1/4 or less of BC depth. Septum intracoronare origin placed on BC. Walls BC with compound curve, thicker anteriorly. Buccal cavity as deep as wide. Dorsal gutter button-like. Anterior deirids and excretory pore 272-287 and 243-258 from anterior end.

Male: Body length 4.3-6.9 mm. Esophagus length 252-306. BC width 28-32; depth 16-22. Spicule length 548-977. Gubernaculum large, with dorsal handle and ventral notch; length 132-148. Dorsal ray length 594-800. Ventral rays shorter than laterals. Dermal collar well developed on ventral side of genital cone. Appendages of genital cone paired, massive oval formations, fused medially, with numerous short protrusions on ventral side.

Female: Body length 4.7-8.0 mm. Esophagus length 256-340. BC width 26-33; depth 20-26. Vulva to tail tip 127-216. Anus to tail tip 95-130. Egg size 85-93 x 40-46. Infundibulum length about equal to sphincter length. Tail of mature females digitiform, straight, tip pointed; sublateral protrusions poorly developed.

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

Locality: cecum, colon.

Distribution: cosmopolitan.