A Robust Conidiobolus with Zygospores Containing Granular Parietal Protoplasm

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Abstract
Conidiobolus eurymitus (Entomophthoraceae, Phycomycetes) was obtained in pure culture by canopying maize-meal-agar plates with detritus sifted from decaying plant materials collected in the northwestern and southeastern regions of Maryland. Its young mycelium often imparts a bronze luster to substratum, possibly by elaboratoring a substance that forms a very thin film on an agar surface. The mycelial hyphae are unusually wide, apparently approximating those of C. utriculosus in this dimension. The photo-tropic conidiophores produce a single globose conidium that soon springs off forcibly by eversion of its dome-shaped basal membrane. After falling on unwet substratum the globose conidium of ten produces a secondary globose spore on the tip of a stout outgrowth. However, after alighting on a wet substratum or on the surface of water it more usually gives rise to an elongate secondary conidium, which likewise springs off from a stout outgrowth, and thereby differs markedly from the elongate secondary conidia of many congeneric spp. Smooth zygospores are formed usually through union of adjacent hyphal segments, less often through conjugation of branches extended from 2 separate hyphae. Owing to the granular texture of their parietal protoplasm, they somewhat resemble in general appearance the oospores of many Pythium spp..

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