Leptographium erubescens (Math.- Kaeaerik ) M.L. Yin, Z.W. de Beer & M.J. Wingf.

Yin, Mingliang, Wingfield, Michael J., Zhou, Xudong, Linnakoski, Riikka & Beer, Z. Wilhelm de, 2019, Taxonomy and phylogeny of the Leptographium olivaceum complex (Ophiostomatales, Ascomycota), including descriptions of six new species from China and Europe, MycoKeys 60, pp. 93-123 : 93

Leptographium erubescens (Math.- Kaeaerik) M.L. Yin, Z.W. de Beer & M.J. Wingf. comb. nov.

≡ Graphium erubescens Math.- Käärik, Medd. Skogs for skninginst. 43: 62 (1953). (Basionym)

≡ Pesotum erubescens (Math.- Käärik) G. Okada, Stud. Mycol. 45: 184 (2000).

≡ Phialographium erubescens (Math.- Käärik) T.C. Harr. & McNew, Mycologia 93: 129 (2001).

Type.

SWEDEN, from pine poles and board, A. Mathiesen-Käärik, lectotype designated here, represented by line drawings (fig. 8b, p. 58; fig. 9 d–f, p. 61) from Mathiesen-Käärik (1953), MBT 379456; Uppland, Skutskär, from piled timber of Pinus sylvestris , 1952, A. Mathiesen-Käärik, (Isotype CBS H-7193, CBS H-7194, ex-type cultures: CMW 40672 = CBS 278.54 = JCM 9747 = No. Sk 13-52).

Descriptions.

Mathiesen-Käärik (1953, p.62, figs8b, 9 f–d); Harrington et al. (2001, pp 128-129, figs 42, 43, 45).

Host tree.

Pinus sylvestris .

Insect vector.

unknown.

Distribution.

Sweden.

Notes.

This species was first described by Mathiesen-Käärik (1953) from pine timber in Sweden. No specimen numbers and very little detail (e.g. no host locality or collection dates) were provided in the protologue. Furthermore, no specimen number and little detail are listed under this species name in the herbarium of the Museum of Evolution, Uppsala, which incorporated Mathiesen-Käärik’s collection. However, in 1954 she deposited an isolate (No. Sk 13-52) in the CBS labeled as L. erubescens . Two dried specimens (CBS H-7193, CBS H-7194) are linked to this isolate and these are labeled as isotypes. It is reasonable to assume that this isolate represents the original material, but there is no conclusive evidence that this is true. We have thus designated the line drawings from the protologue ( Mathiesen-Käärik 1953) as the lectotype.

Harrington et al., (2001) suggested that Graphium erubescens (as Phialographium erubescens ) represented the asexual state of L. cucullatum (as O. cucullatum ) based on ITS sequences. However, based on sequences produced in the present study, the ex-type culture of L. erubescens differs from that of L. cucullatum in 1bp in ITS2-LSU, 17 bp in ACT, 17 bp in BT, 30 bp in CAL, and 48 bp in TEF-1α. We have thus treated these species as distinct and have provided a new combination for L. erubescens .