C. insigne (Boulenger, 1917) Foster, 1936

Figures

Synonyms: Cylichnostomum insigne Boulenger, 1917; Cylicostomum insigne (Boulenger, 1917) Ransom and Hadwen, 1918; Trichonema insigne (Boulenger, 1917) LeRoux, 1924; Trichonema insigne rosenbuschi Galofre and Rosa, 1944.

General: Posterior edge of MC situated anterior to edge of BC. Amphids only slightly projects above MC surface. Tip of submedian papillae bullet-shaped, about 2-3 times as long as thick. Stalk of submedian papillae longer than broad. ELC markedly less numerous (38-44 against 140-150) and longer than ILC. 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 concave. posterior ring of BC wall well developed. Buccal cavity cylindrical. Dorsal gutter not apparent.. Esophageal funnel greatly enlarged, without cuticular lining. Excretory pore and anterior deirids near EI. Esophagointestinal valve not elongated.

Male: Body length 9.5-13.0 mm. Esophagus length 700-900. BC width 135-197, depth 46-66. Spicules length 3.00-3.56 mm. Gubernaculum length 268-284. Dorsal ray length 700-730. Ventral rays length equal to laterals. Dermal collar well developed on ventral side of genital cone. Appendages of genital cone well developed cylindrical, with neeples on the both sides.

Female: Body length 12.6-17.1 mm, length of esophagus 820, width of BC 130-200, depth 56-72, distance from vulva to tail tip .280-480, from anus to tail tip 160- 250, egg size 88-94x54-56.

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

Locality: cecum, colon.

Distribution: cosmopolitan.