Pleosporales » Pleosporales genera incertae sedis » Berkleasmium

Berkleasmium talaumae

Berkleasmium talaumae Bat. & Cavalc., Riv. Patol. veg., Pavia, sér. 3 4: 565 (1964)

Index Fungorum number: 326978            Facesoffungi number: FoF01879

Saprobic on dead twig of T. grandis. Sexual morph: Undetermined. Asexual morph: Colonies on natural substrate, sporodochial, punctiform, scattered, black, shining. Conidiophores up to 25 μm long, 1.5–2 μm wide, micronematous, septate, cylindrical, hyaline, smooth. Conidiogenous cells undetermined. Conidia (32–)42– 44(−48) long (subtending cells included) × (17–)21– 22(−26) μm thick in broadest part (x̅ = 41 × 21 μm, n = 30), 9–14 μm wide at the base (subtending cells), ellipsoidal to obovate, irregularly muriform, middle and apical cells broader than basal cell, brown, paler at the base, slightly constricted at the septa, smooth, hyaline subtending cells at the base.

 

Habitat: Known to inhabit leaves of Talauma ovate (Batista and Cavalcanti 1964) and dead twig of T. grandis.

 

Known distribution: Brazil (Batista and Cavalcanti 1964) and Thailand.

Material examined: THAILAND, Chiang Rai Province, Muang District, Thasood Subdistrict, on dead twig of T. grandis, 2 September 2011, M. Doilom.

 

Notes: The morphology of Berkleasmium talaumae collected from teak is similar to Be. talaumae (type) by having conidia formed in sporodochia and no conidiophores. Conidial dimensions in this study (32)42–44(−48) (subtending cells included) × (17–)21–22(−26) μm (x = 41 × 21 μm, n = 30) are also similar to those of the type (25– 51 × 19–28 μm). Therefore the collection found in the current study is illustrated for possible future reference. Unfortunately there are no cultures or specimens available for this species.

 

 

Figure X. Berkleasmium talaumae. a Colonies on host substrate. b–g Conidia with hyaline subtending cells. h Germinated conidium. Scale bars: b–g = 10 μm, h = 20 μm

 

References: Doilom M, Dissanayake AJ, Wanasinghe DN, Boonmee S, et al. (2017) Microfungi on Tectona grandis (teak) in Northern Thailand. Fungal Diversity 82(1): 107–182.

 

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