Abstract
Drechsler, Charles. (Plant Industry Sta., Beltsville, Md.) Two new species of Conidiobolus found in plant detritus. Amer. Jour. Bot. 47(5) : 368—377. Illus. 1960.–By canopying Petri plates of maize-meal agar with small quantities of friable or mealy plant detritus 2 new species of Conidiobolus, both of moderate dimensions, were isolated. They are described as C. incongruus and C. multivagus. The former, obtained from leaf mold collected in Colorado, produces zygospores which with respect to their internal organization differ markedly from those of congeneric species but resemble rather closely the globuliferous zygospores of Basidiobolus haptosporus and B. meristosporus. Conidiobolus multivagus, obtained from decayed twigs of Casuarina equisetifolia gathered in western Florida, forms a mycelium that soon becomes conspicuously disconnected. The disconnected condition here results partly from the production of many detached slender filaments, which, by constantly withdrawing protoplasmic materials from the posterior end while elongating at the tip, migrate through the slated substratum apparently without any intake of nutrients. The detached conidia of C. incongruus are provided with a more prominent basal papilla than those of C. multivagus, though both species show equally sharp demarcation between the globose main contour of the conidium and the dome-shaped contour of the papillia.
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