BREINLIA-TINJILI SP-N (FILARIOIDEA, ONCHOCERCIDAE), FROM THE MALAYSIAN FIELD RAT, RATTUS-TIOMANICUS, ON TINJIL ISLAND, WEST JAVA, INDONESIA

Breinlia tinjili sp. n. (Filarioidea: Onchocercidae) is described from the thoracic and abdominal cavities of 4 rats, Rattus tiomanicus Mill er, 1900, from Tinjil, an uninhabited island off the west coast of Jav a, Indonesia. Breinlia tinjili adult worms have 12 to 13 asymmetrical perianal papillae, a wide cup-shaped capitulum of both spicules, a 2.5 :1 spicule ratio, a thick trilobed gubernaculum, and numerous cuticula r bosses scattered along the dorsal and ventral surface of the worm. M icrofilaria are unsheathed, measure between 273 and 300 mu m in length , and have 6-9 tail nuclei in a single row and a long lashlike tail. D escriptions are most similar to B. spratti and B. booliati, but differ in the following characteristics: the adults are smaller, the guberna culum is trilobed, paired spicules are smaller, males have an extra pa ir of postanal papillae, and the microfilariae are much larger in B. t injili than in B. booliati. Breinlia spratti has a reduced number and different arrangement of male perianal papillae, a smaller nongrooved gubernaculum, and smaller spicules compared to B. tinjili. This new sp ecies appears to share a number of close characters with other Breinli a species previously described from rodents. The diagnostic value of t hese characters is discussed.