Auricularia delicata (Montagne) Hennings, Botanische Jahrbücher

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 : 27-29

Auricularia delicata (Montagne) Hennings, Botanische Jahrbücher 17: 492 (1893). Facesoffungi number: 02496

Basidiocarp:— 5.2 cm, attached to substrate from corner or centre, slimy and thick, dark crenate margin; abhymenial surface greyish yellow (pinkish), 4B3 to violet brown, 10F7; hymenial surface greyish orange, 5B3 to violet brown, 10F6, reticulated.

Internal features: thickness 1160–1290 μm; medulla present; abhymenial hairs densely arranged, hyaline, blunt or pointed tip, thick walled, wall thickness 2.2–2.4 μm, clear lumen, septa observed, hair bases 6–10 μm wide; clamp connections present; zona pilosa 98–157 μm; zona compacta 21–32 μm; zona subcompacta superioris 55–65 μm; zona laxa superioris 345–395 μm; medulla 200–330 μm; zona laxa inferioris 90–235 μm; zona subcompacta inferioris 90–105 μm; hymenium 65–105 μm; basidia 38–56 × 4–5.5 μm, cylindrical, blunt or tapered ends, sterigmata observed; basidiospores smooth walled, allantoid, hyaline, (11.5)12.3–13(14) × (5)5.7–6.2(6.7) μm, ± SD = 12.6 ± 0.7 × 5.9 ± 0.5 μm, Q = 1.8–2.5, with irregularly shaped guttules.

Collections examined:— THAILAND, Chiang Mai: Chiang Dao, Doi Chiang Dao , on wood, 20 February 1979, T Schumacher (O300854, O300857, O300860) ; THAILAND, Chiang Mai: Chiang Dao, Doi Chiang Dao , on wood, 22 February 1979, K Høiland 25-79 (O300855) ; THAILAND, Chiang Mai: Chiang Dao, Doi Chiang Dao , on trunk of tree, 14 December 1978, T Schumacher 149/78 (O300856) ; THAILAND, Chiang Mai: Mae On, Huai Kaeo , on dead wood, 15 August 2015, AR Bandara DSK8 ( MFLU162117 ) ; THAILAND, Chiang Mai: Mae On, Huai Kaeo , on dead wood, 14 August 2015, AR Bandara DSK3 ( MFLU162118 ) ; THAILAND, Chiang Mai: Mae Taeng, Pa Pae , on dead trunks, 30 July 2014, AR Bandara MRC4 ( MFLU162111 ) ; THAILAND, Chiang Mai: Mae Taeng, Pa Pae , on dead trunks, 30 July 2014, AR Bandara MRC7 ( MFLU162112 ) ; THAILAND, Chiang Mai: Mae Taeng, Pa Pae , on dead trunks, 1 August 2014, AR Bandara MRC10 ( MFLU162113 ) ; THAILAND, Chiang Mai: Mae Taeng, Pa Pae , on dead trunks, 1 August 2014, AR Bandara MRC11 ( MFLU162114 ) ; THAILAND, Chiang Mai: Mae Taeng, Pa Pae , on dead trunks, 1 August 2014, AR Bandara MRC12 ( MFLU162115 ) ; THAILAND, Chiang Mai: Mae Taeng, Pa Pae , on dead trunks, 1 August 2014, AR Bandara MRC14 ( MFLU162116 ) ; THAILAND, Chiang Rai: Mae Fah Luang, Doi Mae Salong , on dead wood, June 2015, B Pechrak AB 104 ( MFLU162119 ) ; THAILAND, Chiang Rai: Mae Fah Luang, Doi Thung , on decaying trunk, 17 June 2014, AR Bandara AB 57 ( MFLU162120 ) .

Note:— Auricularia delicata can be distinguished from other species by its reticulate hymenium.

Auricularia thailandica Bandara & K.D. Hyde, Phytotaxa 208(2): 147–156 (2015). Facesoffungi number: FoF 00467

Basidiocarp:— 2–5 cm, short stalks, orbicular to cupulate to auriculiform, free or undulate margins, semi-transparent, brownish orange, 5C5 to 7E6, ridges and veins seen on abhymenial surface, individual hairs clearly distinguishable, hairs not dense.

Internal features: thickness 340–700 μm; medulla present; abhymenial hairs scattered, non-gregarious, hyaline, acute tip, thin or thick walled, wall thickness 0.9–3.7 μm, clear lumen, septa observed, hair bases 5–11.5 μm wide, hair bases pigmented, light brown, plasmatic; clamp connections present; zona pilosa ≤80 μm; zona compacta 20–45 μm; zona subcompacta superioris 10–30 μm; zona laxa superioris 35–180 μm; medulla 30–100 μm; zona laxa inferioris 100–305 μm; zona subcompacta inferioris 20–80 μm; hymenium 45–80 μm; basidia 32–48 × 2.7–6.3 μm, cylindrical, tapered or blunt ends, transversely 3-septate, sterigmata observed; basidiospores smooth walled, allantoid, hyaline, (9.2)11.2– 11.7(13.1) × (4.1)4.9–5.1(5.7) μm, ± SD = 11.4 ± 0.9 × 5 ± 0.4 μm, Q = 1.8–2.8, with one or two large guttules.

Collections examined:— THAILAND, Chiang Mai: Bahn Pa Dheng, Mushroom Research Center, on dead wood, 14 August 2013, SC Karunarathne K 2013117 Holotype ( MFLU130410 ); THAILAND, Chiang Mai: Chai Prakan, Si Dong Yen, on bamboo tree, 17 July 2015, AR Bandara MRC17 ( MFLU162121 ); THAILAND, Chiang Mai: Chiang Dao , Doi Chiang Dao , on wood, 20 February 1979, T Schumacher (O300861); THAILAND, Chiang Mai: Mae On, Huai Kaeo, on dead wood, 14 August 2015, AR Bandara DSK1 ( MFLU162167 ); THAILAND, Chiang Rai: Mae Fah Luang, Doi Mae Salong, on decaying trunk, 30 July 2013, AR Bandara AB 34 ( MFLU130407 ); THAILAND, Chiang Rai: Mae Fah Luang, Doi Mae Salong, on decaying bamboo tree, 30 July 2013, AR Bandara AB 27 ( MFLU130400 ); THAILAND, Chiang Rai: Mae Fah Luang, Doi Thung, on dead wood, 11 June 2015, AR Bandara AB 102 ( MFLU162122 ); THAILAND, Chiang Rai: Mae Fah Luang, Doi Thung, on decaying trunk, 17 June 2014, AR Bandara AB 63 ( MFLU162123 ); THAILAND, Chiang Rai: Muang, Thasud, Mae Fah Luang University, on dead wood, August 2015, AR Bandara AB 112 ( MFLU162124 ); THAILAND, Nakorn Nayok: Wantakrai, 6 July 1996, RJ Bandoni and TW Flegel 11.974 ( BBH1097 ); THAILAND, Prachuap Khiri Khan: Bang Saphan, on decaying branch, 30 July 2015, AR Bandara ST 12 ( MFLU162125 ).

Note:— Auricularia thailandica can be distinguished from other species of Auricularia that have short and clearly distinguishable abhymenial hairs of the basidiocarp. Among the species that have a medulla, the size of the zona pilosa of A. thailandica is similar to A. fibrillifera , A. fuscosuccinea , A. minor , A. minutissima , A. scissa and A. subglabra ( Bandara et al. 2015) . The abhymenial hairs of A. fuscosuccinea and A. scissa are gregarious and tufted ( Looney et al. 2013). Although A. minor , A. minutissima are characterized by short abhymenial hairs the basidiocarps are smaller ( Kobayashi 1981, Wu et al. 2015a) than A. thailandica . Auricularia fibrillifera is distinct from A. thailandica in having thick-walled, acute, free or partly fasciculate hairs and thinner zones ( Kobayashi 1981). Auricularia subglabra has solitary, infrequent hairs ( Looney et al. 2013). Auricularia subglabra can be distinguished from A. thailandica by the lack of abhymenial hairs, with only a few short hairs present at irregular intervals throughout the zona pilosa.

Auricularia villosula Malysheva & Bulakh, Novosti Sistematiki Nizshikh Rastenii 48: 174 (2014). Facesoffungi number: 02497

Basidiocarp:— 1–4 cm, substipitate to sessile, cupulate to auriculiform, undulate margin. yellow-brown, abhymenial surface very short hairs, not dense.

Internal features: thickness 485–580 μm; medulla absent; very short abhymenial hairs loosely arranged, hyaline, blunt tip, thick walled, wall thickness 2.2–4.1 μm, narrow lumen, hair bases 4–8 μm wide, hair bases pigmented, light brown, plasmatic; clamp connections present; zona pilosa ≤50 μm; zona compacta 9–18 μm; zona subcompacta superioris 13–33 μm; zona intermedia 280–420 μm; zona subcompacta inferioris 20–60 μm; hymenium 60–85 μm; basidia 50–57 × 7.4–7.6 μm, cylindrical, blunt or tapered ends, sterigmata observed; basidiospores smooth walled, allantoid, hyaline, (11.5)15.2– 18.5(19.5) × (6.1)6.7–8.1(9.4) μm, ± SD = 16.9 ± 2.3 × 7.4 ± 1.0 μm, Q = 1.9–2.6, with irregularly shaped guttules.

Collections examined:— THAILAND, Chiang Rai: Mae Fah Luang, Doi Mae Salong , on dead branch, 30 July 2013, AR Bandara AB 38 ( MFLU162126 ) ; THAILAND, Chiang Rai: Mae Fah Luang, Doi Mae Salong , on dead wood, 27 June 2014, AR Bandara AB 115B ( MFLU162127 ) ; THAILAND, Chiang Rai: Mae Fah Luang, Doi Mae Salong , on dead wood, 15 August 2014, AR Bandara AB 115D ( MFLU162128 ) .

Note:— Auricularia villosula can be distinguished from other species by the absence of a medulla and very short abhymenial hairs ≤70 μm ( Malysheva & Bulakh 2014).