Ancyracanthopsis bendelli. sp. (Acuariidae:Schistorophinae) from Pacific Coast grouse, with observations on related nematode genera

Abstract

A. bendelli n. sp. differs from the others of the genus in that its dentate cephalic quadrants join laterally producing a bipartite rather than quadripartite appearance. It can be recognized also by its combination of large dentiform processes, long vestibule, short glandular oesophagus, and 9–14 pairs of preanal papillae; no other species parasitizes an obligate terrestrial host. The following species composition is proposed for Ancyracanthopsis Diesing, 1861: A. bilabiata (Molin, 1860) A. coronata (Molin, 1860); A. madagascariensis Kung, 1948; A. petrovi Guschanskaya, 1950; (?)A. parvialata (Belopolskaya, 1953); A. gallinulae (Wang, 1966) n. comb.; and A. bendelli n. sp. It is concluded that A. quadripartita (Clapham, 1945) and A. schikhobalovi Guschanskaya, 1950 are synonyms of A. coronata, and that Skrjabinobronema sinica Wang, 1966 is a synonym of A. madagascariensis. Specimens of Sciadiocara umbellifera (Molin, I860) (Syn: S. legendrei Petter, 1967) from British Columbia possess minute serrations along the posterior edges of the cephalic lappets. Viktorocara limosae Mawson, 1968 is considered a synonym of V. limosae Daiya, 1966. Stellocaronema Gilbert, 1930 should contain S. skrjabini Gilbert, 1930 (Syn: S, glareolae Mawson, 1968) and S. fausti (Li, 1934) n. comb, (Syn: Stellocaronema buckleyi Sarwar, 1956); S, charadrii Mawson, 1968 probably represents a new genus. New records are A. coronata from Actitis macularia and Seiurus noveboracensis in British Columbia and from Cassidix mexicanus in Mexico; V. limosae from Erolia alpina; and S. skrjabini from E. alpina, Ereunetes mauri, and Crocethia alba in British Columbia.