Helotiales » Calloriaceae » Calloria

Calloria urticae

Calloria urticae (Pers.) J. Schröt. ex Rehm
Facesoffungi number: FoF 05935; Fig. 52
Saprobic on dead stems. Sexual morph: Apothecia 300–350 × 100–150 µm, arising singly or in groups, sessile, erumpent. Receptacle cupulate, reddish orange. Disc concave, reddish orange. Ectal excipulum 15–20 µm (x = 17 µm, n = 10) in upper flanks, composed of thin-walled, light brown to hyaline cells of textura prismatica to angularis. Medullary excipulum 8–12 µm (x = 10 µm, n = 10) in upper flanks, composed of thin-walled, hyaline cells of textura oblita. Hymenium hyaline. Paraphyses 2–3.5 µm wide (x = 2.8 µm, n = 20), numerous, filiform, obtuse, slightly swollen and curved at the apex, aseptate, smooth. Asci 55–75 × 6.5–8.5 µm (x = 61 × 7 µm, n = 30), 8-spored, unitunicate, cylindric-clavate, rounded apex, amyloid, stipitate base, croziers absent. Ascospores 5.5–7 × 3–4 µm (x = 6.6 × 3.6 µm, n = 40), 1–2-seriate, ellipsoid, aseptate, hyaline. Asexual morph: Undetermined.

Material examined – UK, West Sussex, Singleton, on unidentified stem, 5 April 2017, E. B. G. Jones, GJ346a (MFLU 18-0696), GJ346b (MFLU 18-0697). GenBank accessions – MFLU 18-0696: LSU- MK591968, ITS- MK584941, SSUMK585029, TEF- MK637045, RPB2- MK373057; MFLU 18-0697: LSU- MK591969, ITSMK584942, SSU- MK585030, TEF- MK637046, RPB2- MK373058
Notes – Our collection of Calloria urticae from UK grouped with the European collections of C. urticae (G.M. 2015-05-10 and G.M. 2015-04-12) (Fig. 51) with high statistical support. The ITS regions of our collections are identical with C. urticae (G.M. 2015-05-10) and 99% similar to that of C. urticae (G.M. 2015-04-12) (549/550-99% with no gaps). Calloria urticae is characterized by sessile erumpent, reddish orange apothecia, filiform paraphyses with obtuse, slightly swollen and curved apices, cylindric-clavate, amyloid asci and ellipsoid, aseptate ascospores.

Morphology of Calloria urticae (MFLU 18-0696) a Substrate. b Apothecia on stem. c Cross section of an apothecium. d Close up of the cross section of apothecium at margins. e Asci and paraphyses. f Filiform paraphyses. g Ellipsoid ascospores. h Cylindric-clavate ascus. Scale bars: c, d = 40 µm, e = 35 µm, f, g = 5 µm, h = 10 µm.

 

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