C. ashworthi (LeRoux, 1926) McIntosh, 1933

Figures

Synonyms: Cylicostomum nassatum parvum Yorke and Macfie, 1918; Cylicocyclus largocapsulatus (Iren, 1943) Lichtenfels, 1975; Trichonema largocapsulatus Iren, 1943; Cylicocyclus matumurai (Yamaguti, 1942) Lichtenfels, 1975; Trichonema matumurai Yamaguti, 1942; Cylicocyclus (Cylicobrachytus) zhidanensis Zang Bao-Ziang and Li Gui, 1981.

General: Posterior edge of MC situated at anterior edge of BC. Dorsal and ventral notches on mouth collar absent. Amphids projects above MC surface. Tip of submedian papillae spindle-shaped, 2-3 times as long as thick. Stalk of submedian papillae longer than broad. ELC consists 25 -29 elements which longer than numerous ILC elements. Elements of ELC longer than broad. Tips of elements of ILC rounded. Insertion point for posterior ends of elements of ILC on anterior edge of buccal capsule. Walls BC are straight with posterior ring. Buccal cavity cylindrical. Dorsal gutter less than 1/2 of BC depth.. Esophageal funnel shallow. Excretory pore posterior to NR. Anterior deirids near middle of glandular esophagus. Esophagointestinal valve not elongated.

Male: Body length 8.2-9.5 mm. Esophagus length 648-680. BC width 90-124, depth 24-27. distance from anterior deirids to head end about 426-498, from excretory pore 403-504. Male genital cone covered by lateral lobes of bursa. Spicules length 1,.15-1.23 mm. Gubernaculum length 185-207. Dorsal ray length 392-448. Ventral rays shorter then laterals. Dermal collar well developed on ventral surface of genital cone. Appendages of genital cone oval with finger-shaped projections. Protrusions of dermal collar present.

Female: Body length 9.9-11.2 mm, length of esophagus 745-812, BC width 101-149, depth 25-33. Distance from anterior deirids to head end about 487-588, from excretory pore 512-666. distance from vulva to tail tip 252-336, from anus to tail tip 157-213, vagina length 308-448, egg size 80-84x40-44. Female tail straight.

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

Locality: cecum, colon.

Distribution: cosmopolitan.