Capnodiales » Phaeothecoidiellaceae » Chaetothyrina

Chaetothyrina guttulata

Chaetothyrina guttulata Hongsanan & K.D. Hyde, Mycosphere 8: 142 (2016)

Facesoffungi number: FoF01884

 

Epiphytes on surface of leaves and petioles of Mangifera indica. Sexual morph: Thyriothecia up to 170 µm in diameter, superficial, solitary, subdense, dark brown, circular, flattened, with an irregular central ostiole. Upper wall comprising cells of textura angularis, seated on a thin, hyaline basal stroma. Pseudoparaphyses filiform, septate, hyaline. Asci 26–45 × 11–17 μm (x̅ = 35 × 14 µm, n = 30), bitunicate, 8-spored, fusoid, fusiform or clavate, with a short pedicel. Ascospores 11– 15 × 3–5 μm (x̅ = 13 × 4 µm, n = 30), 2–3-seriate, hyaline, ellipsoidal to oblong, 1-septate, constricted at the septum, with 2 guttules in each cell. Asexual morph: Undetermined.

 

Known distribution (based on molecular data): Thailand (Hongsanan et al. 2017b).

 

Known hosts (based on molecular data): Mangifera indica (Hongsanan et al. 2017b).

 

Material examined: Thailand, Chiang Rai, Tasud, Ban Doo, Pong Phra Bat, on living leaves of Mangifera indica (Anacardiaceae), 10 January 2014, X.Y. Zeng (MFLU 14-0006, new sequence data), living culture (MFLUCC 14-0539).

 

GenBank Accession No: ITS-LSU: MN462949; SSU: MN364417; TUB: MN482717; GAPDH:

MN482716.

 

Notes: This new collection was from the same host and locality as the type specimen, and

has identical morphological features. However, there are quite a number of base-pair differences between the two collections (Fig. 1). This species is different from the generic type Chaetothyrina musarum as it lacks setae. Although the author described the characteristic of setae, the latter could not be observed in its photoplate (Hongsanan et al. 2017b). Examination of more samples is needed to understand this species.

Figure X. Chaetothyrina guttulata (MFLU 14–0006, new sequence data). a, b Host plant. c, d Ascomata. e–g Ascomata cross sections. h Ostiole. i Peridium. j Basal wall of ascoma. k Pseudoparaphyses. l-n Asci from immature to mature stage. o–q Ascospores from immature to mature stage, r–s Germinating ascospores. Scale bars: d = 100 μm, e–g = 50 μm, h = 20 μm, i–n = 10 μm, o–q = 5 μm.

 

Reference: Hyde KD, de Silva NI, Jeewon R, Bhat DJ et al.(2020) AJOM new records and collections of fungi: 1-100. Asian Journal of Mycology 3, 22-294.                          

 

 

 

 

 

 

 

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