HomePhilippine Journal of Veterinary Medicinevol. 46 no. 1 (2009)

Fischoederius emiljavieri, a New Species of Pouched Amphistome from Ruminants in the Philippines and Indonesia and Redescription of Fischoederius cobboldi (Poirier, 1883) Stiles & Goldberger, 1910 (Trematoda: Gastrothylacidae)

Salcedo L. Eduardo

Discipline: Veterinary Medicine

 

Abstract:

Collections of pouched amphistomes from ruminants in the Philippines and Indonesia were examined. These were fixed in either 70% ethyl alcohol or 10% formalin. Specimens were hand-sectioned in the sagittal plane, stained in aceto-alum-carmine, cleared in oil of cloves and mounted in Canada balsam. Representative specimens were sectioned by the paraffm method, in the cross and sagittal planes, stained in Delafield's hematoxylin and eosin, cleared. in xylene and mounted in Canada balsam. F. emiljavieri is described as a new species and illustrated by drawings and microphotographs. It is characterized by its elongate size, short ceca about 28% as long as the body length and posterior testis more ventral in location between acetabulum and bottom of ventral pouch but not forming a bulge on the latter; and ventral pouch triangular in cross section with the apex directed ventrally. In median sagittal section, its acetabulum, pharynx, and terminal genitalium are of the carmyerius, paramphistomum and bubalis types, respectively. Fischoederius cobboldi is redescribed based on the present materials. Drawings and microphotographs of the species are also provided. Fischoederius cobboldi is characterized by having long ceca that form dorso-ventral bends with their blind ends directed ventrally and reaching the posterior testis; esophagus having two types of lining, anterior part by a hyaline layer and posterior part by ciliated epithelium; and acetabulum, pharym, and terminal genitalium in median sagittal section of the gas trothylax, paramphis tomum and cobboldi types, respectively. Both species are differ entiated from closely related species of the genus.