ALLOPHARYNX-MACALLISTERI SP. N. (TREMATODA, PLAGIORCHIIDAE) FROM THE MOURNING GECKO, LEPIDODACTYLUS-LUGUBRIS, FROM GUAM, MARIANA ISLANDS, MICRONESIA, WITH A KEY TO THE SPECIES OF THE GENUS ALLOPHARYNX

Allopharynx macallisteri sp. n. (Trematoda: Plagiorchiidae), a new ast riotrematid trematode from the small intestine of Lepidodactylus lugub ris, is described and illustrated. Three of 21 (14%) adult specimens o f L. lugubris collected from Guam harbored 7 specimens of A. macallist eri sp. n.; mean intensity was 2.3, range was 1-4. Allopharynx macalli steri sp. n. is distinguished from all other species in the genus by b ody size, location of cirrus and genital pore, distribution of vitella ria, and position of testes. This is the first report of a species of Allopharynx from a gecko host and the Pacific islands. A key to the sp ecies of Allopharynx is included.