The Genus Actinomucor

Abstract

On the basis of study of some 50 strains of Actinomucor, the genus is reevaluated and found still to be monotypic. The new combination Actinomucor elegans (Rhizopus e. Eidam) is made. Descriptions in English and the synonymy are given. The genus shares a number of characteristics with Mucor and Rhizopus, but is taxonomically distinct. Some cultural characteristics are noted. Test strains utilized various carbon sources, but neither lactose nor cellulose. Common nitrogen sources were utilized. A great number of mating combinations on a variety of substrata failed to produce evidence of zygospore formation.