Lactifluus batistae (RUSSULACEAE), A NEW SPECIES FROM BAHIA, BRAZIL

Abstract

Lactifluus batistae is described here as new species from the Atlantic Forest of Northeast Brazil. It is characterized by the rather stout basidiome, straw yellow pileus, velutinous pileal surface, very distant yellowish lamellae, subglobose to ellipsoid basidiospores with isolate warts up to 0.7 µm high, trichoderm pileipellisstructure with long narrow erect cylindric-fusoid hyphae, pseudoparenchymatous subpellis and a lamella trama and pileus context that lack sphaerocytes. The type specimen of Lactifluus caribaeus, the phenetically most similar taxon, is also studied. Both species are assigned to L. subgenus Lactifluus section Phlebonemi. Key words: Agaricomycetes, Neotropic, Russulales, taxonomyLactifluus batistae -uma nova espécie para a Bahia, Brasil. Lactifluus batistae é descrito como uma espécie nova para a Mata Atlântica do Nordeste Brasileiro. Ele é caracterizado pelo basidioma curto, lamelas amareladas muito distantes, basidiosporos subglobosos a elipsoides, com verrugas isoladas atingindo 0.7 µm de altura, pileipelis uma tricoderme com longas hifas cilíndricas-fusóides, subpelis pseudoparenquimatosa e trama da lamela sem esferocistos. O tipo de Lactifluus caribaeus, a espécie feneticamente mais próxima, tembém é analisada. Ambas espécies pertencem a L. subgênero Lactifluus seção Phlebonemi.

Biogeographic history of a large clade of ectomycorrhizal fungi, the Russulaceae, in the Neotropics and adjacent regions

“…However, a tropical African origin has long been posited for Russulaceae based on endemism and morphological distinctiveness (Pirozynski, 1983; Buyck et al ., 1996). In the wider Neotropics, Russulaceae occur in all highland and lowland regions where ECM vegetation is found, and modern work has revealed a plethora of new species (Buyck & Ovrebo, 2002; Miller et al ., 2002, 2012; Wartchow & Cavalcanti, 2010; Cheype & Campo, 2012; Sà et al ., 2013, 2019; Sà & Wartchow, 2013, 2016; Wartchow et al ., 2013; Montoya et al ., 2014; Trierveiler‐Pereira et al ., 2014; Crous et al ., 2017; Delgat et al ., 2020; Duque Barbosa et al ., 2020; Silva‐Filho et al ., 2020; Manz et al ., 2021; Vera et al ., 2021). Several lowland neotropical Russulaceae have affinities with tropical African species (Buyck, 1990; Buyck & Ovrebo, 2002; De Crop et al ., 2017).…”

Lactifluus aurantiorugosus (Russulaceae), a new species from southern Brazil

“…This taxon is classified in Lactifluus sect. Phlebonemi (R. Heim ex Verbeken) Verbeken (Verbeken, 1998;Wartchow et al, 2013), and is phenetically distant from Lactifluus aurantiorugosus (Verbeken, 1998).…”

“…Bezer-ra & M. Cavalc. from section Phlebonemi (Wartchow et al, 2013), and Lactifluus dunensis Sá & Wartchow from section Tomentosi (Sá et al, 2013), both from northeastern Brazil. We describe here an interesting Lactifluus as a new species from the southern Brazilian region of Rio Grande do Sul.…”