Abstract
Mating systems are reported for the following fungi: Amyloflagellula pseudoarachnoidea (unifactorial), Campanella cf. aeruginosa (bifactorial), C. rubescens (bifactorial), Collybia dichrous (bifactorial), C. iocephala (bifactorial), C. polyphylla (bifactorial), Megacollybia platyphylla (bifactorial), Mycena albiceps (bifactorial), M. carolinensis (bifactorial), Oudemansiella brunneomarginta (bifactorial), Panellus mitis (bifactorial), P. patellaris (bifactorial), P. ringens (bifactorial), Pleurotopsis guatemalensis (new species; unifactorial), Polyporus umbellalus (bifactorial), Tetrapyrgos nigripes (bifactorial), T. subdendrophora (bifactorial), T. tropicalis (new species; amphithallic). Discussion is included on the implication of these reports on systematics in the included genera.