Scanning electron microscopy of Aspidogaster ijimai Kawamura, 1913 and A. conchicola Baer, 1827 (Aspidogastrea, Aspidogastridae) with reference to their fish definitive-host specificity.

摘要: Two species of aspidogastreans, namely Aspidogaster ijimai and A. conchicola, were studied by scanning electron microscopy. In nine lakes an old river course, the Tian'ezhou oxbow, investigated in flood plain Yangtze River, was obtained from common carp (Cyprinus carpio) three lakes, conchicola black Mylopharyngodon piceus oxbow. none localities, however, two found together. It is suggested that may be considered as a specialist parasite for carp, at least flood-plain River. The parasites similar many aspects their morphology. Their bodies can both separated into dorsal part ventral disc, with body surface elevated transverse folds, disc subdivided alveoli longitudinal septa, although number different species. depression on neck region prominent species, covered densely non-ciliated bulbous papillae. position mouth, osmo-regulatory pore marginal organ also conchicola. However, microridges trough folds numerous small pits upper septa exclusively ijimai, but uniciliated sensory papillae