Revision of the genus Prionchulus Cobb, 1916 (Nematoda: Mononchina). I. Prionchulus muscorum (Dujardin, 1845) Cobb, 1916 and related species. Annales Zoologici (Warsaw), 53(3), 1 July 2003: 559-577. 568 [Zoological Record Volume 139]