OBSERVATIONS ON SOME NEW AND UNUSUAL ENTEROPHILOUS PHYCOMYCETES

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Abstract
Representatives from the three trichomycete orders: the Amoebidiales, Eccrinales, and Harpellales were found in various arthropods from Western North America. Amoebidium parasilicum Cienk. was noted on Cladocera and Phyllopoda. Paramoebidum sp. was found in the hindgut of mayfly larvae collected from four localities in California. A bifurcate eccrinid, Enterobryus bifurcatus sp. nov. with a median holdfast and two sporulating thallus arms was taken from the hindgut of the milliped, Californiobolus uncigerus Wood. The marine eccrinid Enterobryus hyalophilus Cronin and Johnson was found as an abundant commensal in the digestive tract of Emerita anatoga Stimpson. A new harpellid, Pteromaklron protrudens, is described as a commensal in, and protruding out of, the hindgut of the mayfly, Calibaetis pacificus Seemann. Genistella ramosa Léger and Gauthier was also found in mayfly larvae, and a possible germination mechanism for the zygospore is discussed. Attempts to culture the intestinal trichomycetes were unsuccessful. Speculations on the homogeneity of the class Trichomycetes, with special reference to the character of the cell wall, are included.

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