Rambellia nodosa R. F. Castaneda, D. W. Li & P. M. Kirk 2024, sp. nov.

Rambellia nodosa R.F.Castañeda, D.W.Li & P.M.Kirk, sp. nov. Index Fungorum: IF902079. Diagnosis: Rambellia nodosa differ from Acrodictyopsis lauri P.M. Kirk (1983: 262) by the tretic conidigenesis, dimensions, and dictyoseptate conidia with helicosporous affinities during development. Etymology:—In reference to the bulbil-subclathroid, irregular catenate conidia. Holotype (designed here):— COSTA RICA, Parque Nacional La Amistad, on indeterminate dead leaves, 11 February 2005, USJ 110000. Illustration:—Fig. 39 p. 145 (Rambelli & Ciccarone 2008). Description:—Colonies hairy-granulose, brown. Conidiophores solitary, macronematous, unbranched or sometimes branched at the apex, straight or slightly flexuous, smooth, brown, 100–200 × 9 µm. Conidiogenous cells polytretic, integrated, terminal and intercalary, sympodial extended, cicatrized. Conidia acropleurogenous, bulbiloid-subclathroid or rudimentary sclerotium-like, complex, composed by compact, irregular, euseptate, body, multicellular, somewhat globose, conglomerated, with cells globose, smooth, ≤ 13 µm diam., moniliform, smooth, pale brown or brown. Notes:—The genus Rambellia is distinguished by the specimen that the production of bulbil-subclathroid to rudimentary sclerotium-like, complex conidia seceding schizolytically from tretic conidiogenous cells, and superficially resembles the monotypic genus Acrodictyopsis lauri P.M.Kirk that has holoblastic, complex, irregular, somewhat coiled, multicellular conglomerated conidia (Kirk 1983). Originally published as “ Beltrania maxima ” Rambelli [in Rambelli & Ciccarone, Quad. Bot. ambient. appl. 19: 127 (2008), nom. inval., Art. 40.1, see Arts 40.2, 40.3: the missing information on the location of the holotype] [IF 581592], is replaced by the genus described below.