Diphymyces torresii W. Rossi & Santam., 2020

Rossi, Walter, Das, Kanad, Hembrom, Manoj Emanuel, Santamaria, Sergi, Parihar, Arvind, Ghosh, Aniket, Henkel, Terry W., Hofstetter, Valerie & Randrianjohany, Émile, 2020, Fungal Biodiversity Profiles 91 - 100, Cryptogamie, Mycologie 20 (4), pp. 69-107 : 73-74

93. Diphymyces torresii W. Rossi & Santam. , sp. nov.

(Fig. 3)

Receptacle and appendage darkened on the posterior side; perithecium elongate and light colored with a distinctly asymmetrical tip lacking any outgrowth.

HOLOTYPE. — Ecuador. Prov. Zamora-Chinchipe, Estación Científica San Francisco , 3°58’19”S, 79°04’44.06”W, about 1900 m, 10-14. VIII.2014, M. Bernardi, W. Rossi & J. Torres, on right elytron of Dissochaetus intermedius Salgado (FI WR3916 ).

MYCOBANK. — MB 832706.

ETYMOLOGY. — Named after Juan Andres Torres Celi, student of the Ecuadorian Labulbeniales and one of the collectors of the new species.

DESCRIPTION

Thallus chestnut brown on the posterior side of cells II and III and the lower cells of the appendage, contrasting with the hyaline branchlets of the appendage, and with the remain- der of the thallus, which is light brown. Cell I irregularly conical, with the lower, slenderer portion extending beyond the black foot. Cell II quadrangular, slightly broader at the distal end, about twice as long as it is broad. Cell III 1.5× longer than broad, giving rise apically to an erect series of 4-5 cells gradually paler and slenderer, each bearing on the inner side short antheridial branchlets that bifurcate from the base; each branchlet consists of a single series of cells separated by oblique septa, which are converted directly into simple antheridia with upwardly-directed efferent necks. Cell VI similar to cell II but somewhat slenderer, separated from the perithecial basal cells by a very oblique septum. Perithecium slender, about 5× as long as maximum width, very slightly inflated in the lower third; the asymmetrical tip bent posteriorly, somewhat convex on the posterior side and distinctly concave on the opposite side; ending with a blunt, oblique apex. Length from foot to perithecial apex 118-127 µm. Length from foot to longest appendage 113 µm. Perithecium: 82-88 × 17-18 µm. Ascospores about 20 µm in length.

NOTES

To date, the number of species in the genus Diphymyces is 25, including the new one described here ( Rossi & Santamaria 2010, Haelewaters et al. 2014, Haelewaters & Rossi 2015). These fungi are all associated with the small carrion beetles ( Leiodidae ) with the exception of D. penicillifer A. Weir & W. Rossi , which occurs on rove beetles ( Staphylinidae ) ( Weir & Rossi 1997). Most of the species of Diphymyces are known only from the type series and none of them was reported from the African continent.

FIG. 3. — Diphymyces torresii W.Rossi & Santam. , sp.nov.: A, B, two thalli from the type slide.Scale bars: 50 µm.