Anabeltraniomyces maximus R.F.Castañeda, Mardones, P.M.Kirk & Gusmão, 2024

Anabeltraniomyces maximus R.F.Castañeda, Mardones, P.M.Kirk & Gusmão , sp. nov.

Index Fungorum: IF902140.

Diagnosis:— Anabeltraniomyces maximus differ from Beltraniomyces spp. by its monoblastic, intercalary conidiogenous cells with flat, laterally slightly protuberant, cicatrized conidiogenous loci and its conidia with a short, acute, rostrate apical appendage.

Etymology:—Latin, maximus , meaning the largest, greatest.

Holotype (designed here):— COSTA RICA, along the road to San Isidro de El General at 3200 m alt., on dead leaves of Clusia sp. , 8 February 2005, USJ 82714 .

Illustration:—Fig. 2 p. 127 ( Rambelli & Ciccarone 2008).

Description:—Colonies effuse, velutinous, brown or golden-brown. Setae unbranched, dark brown, smooth, arising from radially lobed base, septate, ≤ 550 µm length, 2.3–6 µm wide. Conidiophores macronematous, mononematous, unbranched, erect or slightly flexuous, brown, smooth, ≤ 230 µm length, 5–6 µm wide, arising near the setae basal cells. Conidiogenous cells monoblastic, integrated, terminal and intercalary, brown, slightly elongating laterally of the previous fertile apical locus, almost always at the same site and producing a succession of cells, each with one, rarely two, flat, cicatrized locus, scars ≤ 5 µm wide. Conidial secession schizolytic. Conidia solitary, acropleurogenous, biconical, acute, rostrate apex, subhyaline transverse band just or near the middle part, yellow brown, smooth, dry, 44–46 × 16–18 µm; apical appendage 2–4 μm long.

Notes:—The genus Beltraniomyces ( Manoharachary et al. 2003) typified by B. lignicola Manohar., D.K.Agarwal & Rao (2003: 420) is characterized by macronematous, mononematous, pluriseptate, erect, unbranched, somewhat geniculate, brown conidiophores, and mono- to polyblastic, intercalary and terminal, integrated conidiogenous cells with flat, cicatrized loci after schizolytic conidial secession. The conidia are solitary, biconical, rounded to obtuse at the apex, truncated at the base, pale brown with a median, hyaline to subhyaline transverse band. Subsequently B. panthericolor L.A.Costa, G.G.Barreto, F.R.Barbosa, Fiúza & R.F.Castañeda (2019: 556) and B. pulcher F.R.Barbosa, Fiúza, G.C.K.Barbosa, R.F.Castañeda & Gusmão (2019: 558) were added by Barbosa et al. (2019). Anabeltraniomyces maximus differs from all Beltraniomyces spp. by the mostly monoblastic, intercalary, conidiogenous cells with laterally protuberant, cicatrized loci and the conidia with a short, acute, rostrate apical appendage.

Validations of names and/or orthographical corrections to resolve the nomenclatural status