Abstract
Abstract Agrocybe is characterized by the collybioid to tricholomatoid basidiomata with rusty to dark spore-print, a hymeniform pileipellis, and basidiosspores with a reduced to broad germ-pore. Recently, the species with reduced germ-pore were segregated to Cyclocybe. The knowledge of these genera in Argentina is scanty, although they have been partially studied in the country, but there is not a field that deals exhaustively with it. Macro- and micromorphological characters of specimens obtained in the feld and from different national herbaria (BAFC, CTES, LIL, LPS) were analyzed. Cultivation techniques were used to obtain basidiomata, allowing for a macro- and micromorphological study of fresh developing basidiomes. We concluded that in Argentina there are, so far, 14 species of Agrocybe (one of them with 3 varieties) and two of Cyclocybe including to C. wrightii, which is proposed as a new combination. Sixteen species are described and a key to the Argentinian species of Agrocybe and Cyclocybe is proposed.
Highlights
Agrocybe Singer is characterized by the collibioid to tricholomatoid basidiomata with rusty brown, tobacco brown or dark brown sporeprint, a glabrous or sometimes aerolate pileus surface, its basidiospores with a broad germpore, a hymeniform pileipellis composed of a palisade of inflated cell and with conspicuous cheilocystidia (Pegler 1983; Singer 1986; Largent & Baroni 1988)
Stev.; Agrocybe part 2, that includes A. arvalis (Fr.) Singer; and Agrocybe part 3 comprising A. dura (Bolton) Singer and A. vervacti (Fr.) Singer (Vizzini et al 2014) species such as Agrocybe erebia and A. cylindracea s.l. are belonging to the resurgent old genus Cyclocybe
Macro- and micromorphology We examined all Agrocybe specimens from Argentina deposited in BAFC, CTES, LIL and LPS herbaria
Summary
Agrocybe Singer is characterized by the collibioid to tricholomatoid basidiomata with rusty brown, tobacco brown or dark brown sporeprint, a glabrous or sometimes aerolate pileus surface, its basidiospores with a broad germpore (sometimes some reduced), a hymeniform pileipellis composed of a palisade of inflated cell and with conspicuous cheilocystidia (Pegler 1983; Singer 1986; Largent & Baroni 1988). 2 de 26Agrocybe was included in the Bolbitiaceae due to the pileipellis characters and the sporeprint color (Singer 1986). Stricto, that comprises A. preacox (Pers.) Fayod, A. smithii Watling & H.E. Bigelow, A. putaminum (Maire) Singer and A. pediades (Fr.) Fayod, Agrocybe part 1, wich includes A. erebia (Fr.) Singer, Cyclocybe erebioides Angelini & Vizzini, A. cylindraceae (DC.) Maire and A. parasitica G. Stev.; Agrocybe part 2, that includes A. arvalis (Fr.) Singer; and Agrocybe part 3 comprising A. dura (Bolton) Singer and A. vervacti (Fr.) Singer (Vizzini et al 2014) species such as Agrocybe erebia and A. cylindracea s.l. are belonging to the resurgent old genus Cyclocybe. Vizzini et al (2014) considered that Cyclocybe comprises larger species of Agrocybe s.l., with membranous ring and basidiospores with germpore rudimentary or absent. These are complex genera, with species with circumscription conflicts as C. aegerita Brig.) Vizzini versus C. cylindracea (DC.) Vizzini & Angelini (Uarth & Albertó 2007; Alam et al 2010), or A. neocoprophila Singer versus A. fimicola (Speg.) Singer (Watling 1992; Watling & Richardson 2010)
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