NEW HOST RECORDS FOR MYXIDIUM-SEROTINUM (PROTOZOA, MYXOSPOREA) FROM NORTH-AMERICAN AMPHIBIANS

Three hundred twenty-five amphibians (80 salamanders, 245 frogs and to ads) from Arkansas and Texas, representing 28 species within 9 familie s (Ambystomatidae, Plethodontidae, Salamandridae, Sirenidae, Bufonidae , Hylidae, Leptodactylidae, Microhylidae, Ranidae) were examined for g all bladder myxosporeans. Of these, 32 (10%) were found to harbor Myxi dium serotinum Kudo and Sprague, 1940, including 3 (4%) of the salaman ders and 29 (12%) of the frogs and toads. This report documents 6 new host records for M. serotinum in Ambystoma opacum, Bufo americanus cha rlesmithi, Bufo speciosus, Acris crepitans blanchardi, Gastrophryne ol ivacea, and Pseudacris streckeri illinoensis. In addition, the Great P lains narrowmouth toad G. olivacea represents the first microhylid hos t of Myxidium spp. worldwide.