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Gymnogaster
''Gymnogaster'' is a genus of fungi in the family Agaricaceae.〔 It is a monotypic genus, containing the single secotioid species ''Gymnogaster boletoides'', found in Australia. The fungus produces bright yellow fruit bodies with a light brown internal gleba, and the fruit bodies turn blue then dark brown after bruising or handling.
==Taxonomy and classification==
The genus was circumscribed by Joan Winifred Cribb in 1956, based on specimens she found growing in the woods of Mount Glorious, Queensland in February the previous year. The genus differs from the similar ''Secotium'' in that it lacks a peridium. Cribb initially placed the genus within the Secotiaceae family,〔 but this has since been made synonymous with the Agaricaceae.〔Kirk ''et al''. (2008), p. 627.〕 In his second (1962) edition of his influential ''Agaricales in Modern Taxonomy'', Rolf Singer placed ''Gymnogaster'' in the Gastroboletaceae, (a family that has since been folded into the Boletaceae),〔Kirk ''et al''. (2008), p. 274.〕 in which he also included the genera ''Austrogaster'', ''Truncocolumella'', ''Gautieria'', ''Chamonixia'', ''Brauniellula'', and ''Gastroboletus''.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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