Caliciales » Caliciaceae » Pyxine

Pyxine berteriana

Pyxine berteriana (Fée) Imshaug, Trans. Am. Microsc. 76: 254 (1957)

Facesoffungi number: FoF 07199

 

Thallus corticolous, upper surface grey to greyish green, photobiont detected. Sexual morph: Ascomata apothecial, approximately 300–800 μm diam., black, circular to ellipsoidal, adnate, slightly erumpent from the thallus. Epihymenium 10–35 μm, olivaceous brown, Hymenium 65–100 μm, hyaline. Pseudoparaphyses 1–1.5 μm wide, brown at the tips, densely arranged, tip swollen with pigments, 0.2–0.8 μm wide, Hypothecium distinct, 40–110 μm height, dark brown. Asci 45–65 × 12–20 μm (x̄ = 55 × 16 μm, n = 40), 8-spored, bitunicate, fissitunicate, brown, clavate to obovoid, concave, tip blunted, narrowing towards the apex, poorly developed pedicel. Ascospores 12–20 × 4–7 μm (x̄ = 16 × 5.5 μm, n = 40), crowded, brown, smooth-walled, fusoid to obovoid, ends remaining cone-shaped, 0–1-septate, with large guttules, not constricted at the septa. Asexual morph: Undetermined.

 

Host and habitat: On rock (Yang et al. 2019), on dead bark of unidentified plant (Hyde et al. 2020)

 

Known host and distribution: China

 

Material examined: CHINA, Yunnan Province, Baoshan, N 25° 16′ 19.3″, E 099° 18′ 47.8″, on dead bark of unidentified plant, 19 September 2018, V. Thiyagaraja, D4B1 (MFLU 19-0720).

 

GenBank Accession No: ITS: MN792989, mtSSU: MN792788.

 

Notes: We followed the latest treatment and updated accounts of genus Pyxine in Yang et al. (2019). New specimen was collected from dead bark, while two other specimens (P. berteriana KUN 15-47921 and KUN 14-43730) grow on rock. A nucleotide base comparison of ITS gene region reveals 13/554 (2.3%) differences between new strain and P. berteriana (KUN 14 43730, KUN 15 47921). However, no significant differences were observed in the morphological comparison among these species. Phylogenetic analyses of a combined ITS and mtSSU sequence dataset reveal new strain clusters with P. berteriana (KUN 15-47921 and KUN 14-43730) with high statistical support (100% ML, 1.00 BYPP). Therefore, we introduce P. berteriana (MFLU 19-0720) as a new record on dead bark in China.

 

 

 

Figure X.   Pyxine berteriana (MFLU 19-0720). a–c Ascomata on substrate. d–f Vertical section through ascoma (d = in water, e = in logul’s solu- tion, f = in KOH). g Paraphyses. h Asci. i–s Ascospores. Scale bars: a = 500 μm, b–f = 200 μm, g, h = 30 μm, i–s = 10 μm.

 

References:

 

Hyde KD, Dong Y, Phookamsak R, Jeewon R, Bhat DJ, Jones EB, Liu NG, Abeywickrama PD, Mapook A, Wei D, Perera RH (2020) Fungal diversity notes 1151–1276: taxonomic and phylogenetic contributions on genera and species of fungal taxa.

Yang MX, Wang XY, Liu D, Zhang YY, Li LJ, Yin AC, Scheidegger C, Wang LS (2019) New species and records of Pyxine (Caliciaceae) in China. MycoKeys 45:93–109

 

 

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