Auricularia delicata Hennings, Botanische Jahrbucher
Creators: name: Bandara, Asanka R.
name: Karunarathna, Samantha C.
name: Phillips, Alan J. L.
name: Mortimer, Peter E.
name: Xu, Jianchu
name: Kakumyan, Pattana
name: Hyde, Kevin D.
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Fungi
Basidiomycota
Agaricomycetes
Auriculariales
Auriculariaceae
Auricularia
Auricularia delicata

description: 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).
description: Published as part of 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, pp. 19-34 in Phytotaxa 292 (1) on pages 27-29, DOI: 10.11646/phytotaxa.292.1.2, http://zenodo.org/record/13697981