title: Fischoederius cobboldi: A scanning electron microscopy investigation of surface morphology of adult rumen fluke.
abstract: Adults Fischoederius cobboldi are conical-shaped, concave ventrally and convex dorsally, measures about 8-10mm in length and 4-6mm in width across the mid section. Scanning electron microscopy (SEM) of entire body showed that the tegumental surface exhibits highly corrugation and transverse folds alternating with grooves and without spines. At higher magnification, the surface of each fold is further increased with a meshwork of ridges separated by irregular-sized pits. The ventral surface has more complex corrugations and invaginations than those of the dorsal surface of the body. Both anterior and posterior suckers have thick edges covered with transverse folds and appear spineless. The genital pore is located at the anterior one-third of the body. There are two types of sensory papillae on the surface: type 1 is bulbous in shape and nipple-like tips, measuring 10-15 μm in diameter at the base, and also type 2 is a similar shape and has short cilia on tips. These sensory papillae occur in large clusters, each having between 7 and 25 units depending on the region of the body. Clusters of papillae on the ventral surface and around the anterior suckers tend to be more abundant and larger in size. The dorsal side of the body exhibit similar surface features, but papillae appear less numerous and are smaller. Corrugations and invaginations of the dorsal aspect are also less extensive than those on the ventral surface of the body.
authors.affiliation: Division of Agricultural Science, Mahidol University, Kanchanaburi Campus, Saiyok, Kanchanaburi 71150, Thailand; Department of Anatomy, Faculty of Science, Mahidol University, Rama VI Rd., Bangkok 10400, Thailand.
authors.forename: Panat
authors.initials: P
authors.lastname: Anuracpreeda
authors.forename: Busaba
authors.initials: B
authors.lastname: Panyarachun
authors.forename: Arin
authors.initials: A
authors.lastname: Ngamniyom
authors.forename: Yotsawan
authors.initials: Y
authors.lastname: Tinikul
authors.forename: Charoonroj
authors.initials: C
authors.lastname: Chotwiwatthanakun
authors.forename: Jaruwan
authors.initials: J
authors.lastname: Poljaroen
authors.forename: Prasert
authors.initials: P
authors.lastname: Sobhon
mesh_terms: D000818:Animals; D002020:Buffaloes / Q000469:parasitology*; D002417:Cattle; D002418:Cattle Diseases / Q000469:parasitology*; D008855:Microscopy, Electron, Scanning / Q000662:veterinary; D010250:Paramphistomatidae / Q000648:ultrastructure*; D012417:Rumen / Q000469:parasitology*; D014201:Trematode Infections / Q000469:parasitology / Q000662:veterinary*