Helotiales » Lachnaceae » Erioscyphella

Erioscyphella abnormis

Erioscyphella abnormis (Mont.) Baral, Šandová & B. Perić
= Lachnum abnorme (Mont.) J.H. Haines & Dumont
Facesoffungi number: FoF 05911; Fig. 42.
Saprobic on dead stems. Sexual morph: Apothecia 1–2.5 × 0.5–1.3 mm, arising singly, stipitate. Receptacle cupulate, brownish yellow, covered with hairs. Margin concolorous to receptacle, covered with hairs. Disc concave. Hairs 90–120 × 3.5–5 µm (x = 103 × 4.7 µm, n = 30), cylindric, septate, walls rough and covered with granules, pigmented, light to dark brown. Ectal excipulum 40–55 µm (x = 45 µm, n = 10) in lower flanks, composed of thin-walled, slightly pigmented, light brown to hyaline cells of textura prismatica to angularis. Medullary excipulum 65–75 µm (x = 70 µm, n = 10) in lower flanks, composed of thin-walled, hyaline cells of textura porrecta. Hymenium hyaline. Paraphyses 2.5–3.5 µm wide (x = 2.7 µm, n = 20), numerous, filiform, conical apex, septate, sometimes exceeding the asci in length, smooth. Asci 80–95 × 8–11 µm (x = 86.3 × 9.4 µm, n = 30), 8-spored, unitunicate, cylindric-clavate, conical apex, amyloid, substipitate base, arising from croziers. Ascospores 40–65 × 1.5–2.5 µm (x = 45.5 × 1.8 µm, n =40), multi-seriate, fusoid, 1–4-septate, hyaline, guttulate, tapered towards the base. Asexual morph: Undetermined.
Material examined – China, Yunnan Province, Xishuangbanna, Jinghong, 9 June 2018, Zeng Ming, HC39 (MFLU 18-1826, HKAS102127).
GenBank accessions – LSU- MK591977, ITS- MK584950, SSU- MK585049, RPB2- MK614730
Notes – Our new collection HC39 from China clustered within Erioscyphella abnormis clade and the clade has strong statistical support of 99% (Fig. 35). The ITS and LSU data of our collection is 99% similar to Lachnum abnorme specimens of KUS-F52080 (ITS: 807/843-96% with 6 gaps, LSU: 1127/1128-99% with 1 gap) and TNS:F-16617 (ITS: 791/801-99% with no gaps). Morphology of our collection is similar to the description of E. abnormis provided by Spooner (1987). However, all the observed ascospores were 1–4-septate and we did not observe 7-septate ascospores as described for E. abnormis (Spooner 1987). Asci in our collection are slightly smaller than described for E. abnormis (Spooner 1987). Therefore, we assume that our collection is immature. Our collection is similar to E. australiense which is characterised by 1–3-septate ascospores, but E. australiense differs in having lanceolate paraphyses (Spooner 1987).

Morphology of Erioscyphella abnormis (MFLU 18-1826) a Substrate. b Apothecia on wood. c Excipulum at margins. d Long cylindrical hairs. e Filiform paraphyses. f, g Cylindricclavate asci. h–j Fusoid ascospores. k Amyloid ascus apex. Scale bars: c = 50 µm, d, f, g = 20 µm, e = 30 µm, k = 10 µm, h–j = 5 µm

 

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