Auricularia cornea Ehrenberg, Horae Physicae Berolinenses

Bandara, Asanka R., Karunarathna, Samantha C., Phillips, Alan J. L., Mortimer, Peter E., Xu, Jianchu, Kakumyan, Pattana & Hyde, Kevin D., 2017, Diversity of Auricularia (Auriculariaceae, Auriculariales) in Thailand, Phytotaxa 292 (1), pp. 19-34 : 26-27

Auricularia cornea Ehrenberg, Horae Physicae Berolinenses : 91 (1820). Facesoffungi number: 02495

Basidiocarp:— 3.5–9 cm, attached to substrate from corner or centre, short stalks, undulate margin; abhymenial surface light brown, 6D6 to dark brown, 9F5; hymenial surface brownish orange, 5C3 to dark brown, 8F4, ridges and veins present, veins lighter in colour, brownish orange, 7C3 than surface of hymenium.

Internal features: thickness 920–1220 μm; medulla present; abhymenial hairs densely arranged, fasciculated at bottom, separated or clustered at the top, hyaline, blunt or pointed tip, thin or thick walled, wall thickness 1–3.5 μm, clear lumen, hair bases 5.5–7 μm wide; clamp connections present; zona pilosa 315–400 μm; zona compacta 25–35 μm; zona subcompacta superioris 40–50 μm; zona laxa superioris 160–230 μm; medulla 75–125 μm; zona laxa inferioris 100–350 μm; zona subcompacta inferioris 50–80 μm; hymenium 75–90 μm; basidia 55–66 × 3–4 μm, cylindrical, blunt or tapered ends, sterigmata observed; basidiospores smooth walled, allantoid, hyaline, (10.2)13.5–14.5(16.7) × (5.1)6–6.3(7.1) μm, ± SD = 13.9 ± 1.4 × 6.1 ± 0.5 μm, Q = 1.5–3.0, with one large irregularly shaped guttule.

Collections examined:— THAILAND, Bangkok: Mahidol Campus , on tree, 27 September 1995, RJ Bandoni and TW Flegel 11.469 ( BBH 862 ) ; THAILAND, Chiang Mai: Mae On, Huai Kaeo , on dead wood, 15 August 2015, AR Bandara DSK7 ( MFLU162105 ) ; THAILAND, Chiang Mai: Mae On, Huai Kaeo , on dead wood, 16 August 2015, AR Bandara DSK12 ( MFLU162106 ) ; THAILAND, Chiang Mai: Mae Taeng, Pa Pae , on decaying trunk, 30 July 2014, AR Bandara MRC8 ( MFLU162104 ) ; THAILAND, Chiang Rai: Mae Fah Luang, Doi Mae Salong , on dead stump, 30 July 2013, AR Bandara AB 30 ( MFLU130403 ) ; THAILAND, Chiang Rai: Mae Fah Luang, Doi Thung , on decaying trunk, 17 June 2014, AR Bandara AB 51 ( MFLU162107 ) ; THAILAND, Chiang Rai: Muang, Tasud, Mae Fah Luang University , on decaying wood, June 2015, AH Ekanayaka AB 113 ( MFLU162108 ) ; THAILAND, Prachuap Khiri Khan: Bang Saphan , on dead wood, 30 July 2015, M Dayarathne ST 14 ( MFLU162110 ) ; THAILAND, Prachuap Khiri Khan: Bang Saphan , on decaying branch, 30 July 2015, AR Bandara ST 10 ( MFLU162109 ) .

Note:— Auricularia cornea is morphologically similar to A. nigricans but can be distinguished by its shorter abhymenial hairs.