Torrendiella Boud.

Johnston, Peter R., Park, Duckchul, Baral, Hans-Otto, Galán, Ricardo, Platas, Gonzalo & Tena, Raúl, 2014, The phylogenetic relationships of Torrendiella and Hymenotorrendiella gen. nov. within the Leotiomycetes, Phytotaxa 177 (1), pp. 1-25 : 6-7

Torrendiella Boud. in Boudier & Torrend, Bull. Soc. Mycol. Fr. 27: 133 (1911).

Type: T. ciliata Boud.

Apothecia 0.3–2 mm diam., with short to long stalk erumpent from host tissue, disc whitish to cream or grey, exterior concolorous or light to black-brown, receptacle and partly also stalk with dark brown setae. Asci 8-spored, apex hemispherical to slightly conical, apical ring staining blue in IKI (without KOH, type bb, euamyloid), of the Sclerotinia - type: forming a thick-walled tube extending through the entire apical thickening, at the apex laterally widened, basally distinctly projecting to form an apical chamber; base arising from simple septa (often with a basal protuberance). Ascospores non-septate when mature, hyaline, straight or slightly to strongly curved, narrowly to broadly ellipsoid (-subclavate) or ovoid (slightly heteropolar), containing in the living state some large and many small oil drops (high lipid content), with a thin sheath around the entire spore that separates after discharge, without polar gelatinous caps, overmature 1–3-septate, budding narrowly tear-shaped microconidia. Paraphyses cylindrical, straight, not or slightly enlarged at the apex, containing a few large, short to very long, strongly refractive, hyaline vacuolar bodies (living state), mainly in the terminal cell. Ectal excipulum comprising three layers, outer layer (ec1) of meandering hyphae encrusted with light brown wall pigment (banded aspect); central layer (ec2) hyaline, at flanks of non-gelatinized, horizontal textura prismatica ( T. ciliata ) or strongly gelatinized, ± vertical textura oblita ( T. setulata ), towards margin of narrow, long-cylindrical cells immersed in abundant gel (t extura oblita) oriented at a low angle to the surface; inner layer (ec3) of non-gelatinized textura prismatica-porrecta, pale brown, smooth-walled to slightly encrusted. Setae with dark brown, thick, smooth wall, base unbranched, rooting.

Habitat:—developing on fallen leaves and corticated twigs of angiosperm trees and Rubus .

Further included species:— T. quintocentenaria R. Galán & J.T. Palmer in Galán et al. (1993: 230), T. setulata (Dearn. & House) R. Galán & J.T. Palmer in Galán et al. (1993: 236).

FIGURE. Bayesian analysis of ITS gene sequences, showing detailed species-level relationships of Hymenotorrendiella within the ‘ Hymenoscyphus clade’ from Figure 1. Bayesian posterior probabilities greater than 90% are shown above the edges. Sequences marked with voucher numbers ( AH, PDD, F) were newly generated for this study (see Table 1), the others were downloaded from GenBank.