Fungi (Jahn & Jahn, 1959) Class Gymnocarpi Order Hymenothecii Agarici Genus Agaricvs L. (1753), nom. sanct., nom. cons. Section Omphalia Pers. (1801) Minores, pileo membranaceo plerumque striato. (Agaricus Epichysium, Nigrella. Agaricus vulgaris et Epipterygius.)