Revision of the genus Prionchulus Cobb, 1916 (Nematoda: Mononchina). II. Prionchulus spectabilis (Ditlevsen, 1911) Cobb, 1916 and related species. Annales Zoologici (Warsaw), 54(3), 30 September 2004: 491-509. 502 [Zoological Record Volume 141]