A NEW SPECIES OF CLINOSTOMUM (DIGENEA: CLINOSTOMIDAE) FROM CLIMBING PERCH (Trichogaster trichopterus) IN RIAU, INDONESIA

Abstract

The aim of study is to identify the Clinostomum sp.obtained from visceral organs of Climbing perch (Trichogaster trichopterus) in Riau, Indonesia. In September 2010, Climbing perch (Trichogaster trichopterus) in Riau, Indonesia were collected, identified and examined for Clinostomum infection. Digenea, encysted metacercariae of Clinostomum were excysted with a needle, fixed in 10% formalin solution for morphological examination. Some samples were fixed with glutaraldehyde for SEM, and with ethanol absolute solution for molecular analysis. The result showed that the metacercariae of Clinostomum sp. from Riau had a body shaped like leaf. The surface of the body had not spinae. The anterior part was narrower than posterior. Posterior end was round. Body length had size of 347.2 (298.6 to 395.8) μm, body width of 127.2 (115.7 to 138.6) μm. Oral sucker small, terminal and had size of 16.2 (14,29 to 18,6) μm. Ventral sucker larger than oral sucker and had size of 63,6 μm. Clinostomum sp. has similarities to Clinostomum phalacrocorasis based on molecular study. This research was the first investigation of Clinostomum sp. in Climbing perch (Trichogaster trichopterus) as second intermediate host found in Riau, Indonesia.