HUMAN PINWORMS COLLECTED FROM A CHIMPANZEE, PAN-TROGLODYTES, IN A ZOOOF OKINAWA, JAPAN

Enterobius vermicularis (Linnaeus, 1758) and Enterobius gregorii Hugot , 1983 (Nematoda: Oxyuridae), were collected from a chimpanzee, Pan tr oglodytes, reared in a zoo of Okinawa, Japan. This is the first record of E. gregorii from chimpanzee. The male of E. vermicularis was signi ficantly larger than that of E. gregorii. The 2 species were readily d istinguished by the shape and length of the basal portion of the spicu le while the morphology of the distal tubular portion was identical. T he spicule in the males immediately after the final molt had only a di stal tubular portion, indicating that the basal portion develops durin g the subsequent maturation process. Presence of intermediary forms of the basal portion between the typical E. vermicularis is and E. grego rii types suggests that the basal portion of the former grows from tha t of the latter.