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Thaxter's original description of Rhizopodomyces is emended to reflect new information gained from a study of not only the type species, R. merragatae, but also of six additional species described as new, R. basifurcatus, R. californicus, R. erectus , R. geniculatus, R. mexicanus, and R. polhemusii. All of the species have been found on semiaquatic bugs of the family Hebridae (Hemiptera). The female thallus of Rhizopodomyces spp. consists of a simple, two-celled receptacle, the suprabasal cell bearing a one-celled primary appendage and giving rise usually to a single, longstalked perithecium. The male thallus initially consists of three cells , a twocelled receptacle and a terminal cell which may form a simple antheridium directly or remain sterile and form a simple appendage, in which case the suprabasal cell of the receptacle divides and forms one or two simple antheridia directly. Rhizopodomyces is compared with several other dioecious genera of Laboulbeniales of similar morphology, Amorphomyces, Dioicomyces, Dicrandromyces, Triandromyces, and Tetrandromyces. Speculations regarding the possible relationship of Rhizopodomyces to these genera are presented.

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© 1979 Richard K. Benjamin

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