Dothideomycetes » Naetrocymbaceae

Bonaria

Citation: Pem D et al. (2019) Mycosphere Notes 275-324: A morphotaxonomic revision and typification of obscure Dothideomycetes genera (incertae sedis). Mycosphere 10(1), 1115–1246

 

Bonaria Bat., Publicações Inst. Micol. Recife 56: 438 (1959)

Foliar epiphyte on upper and lower surface of living leaves, forming black rounded spots. Mycelium superficial, not apparently penetrating host cells. Sexual morph: Thyriothecia circular, solitary or in groups, gregarious, superficial, carbonaceous, dark brown to black, ostiolate. Peridium comprising a single stratum of black-brown cells of closely arranged textura angularis. Hamathecium comprising asci embedded in pseudoparaphyses. Asci 6-spored, bitunicate, fissitunicate, saccate, globose or subglobose to oblong, apedicellate, apically rounded and endotunica thick-walled near apex without a distinct ocular chamber. Ascospores 2 or 4 seriate, elongate-ellipsoidal, hyaline, 2-celled, slightly constricted at the septum, lower cells slightly longer than upper cell, appearing rough-walled. Asexual morph: Undetermined.

 

Type species – Bonaria lithocarpi (V.A.M. Mill. & Bonar) Bat.

 

Notes – The monotypic genus Bonaria was introduced by Batista to accommodate Bonaria lithocarpi (Protopeltis lithocarpi) as the type species. It was placed in the family Micropeltidaceae in Lumbsch & Huhndorf (2010), however, later, Hyde et al. (2013) excluded the genus from Micropeltidaceae and Wijayawardene et al. (2018) treated the genus in Dothideomycetes, genera incertae sedis. Currently, two other species are accepted in the genus namely, Bonaria chandleri (Hansf.) Bat. and Bonaria phyllanthi Bat. & C.A.A. Based on the morphological characters, B. lithocarpi shares similar characters to species in Naetrocymbaceae (Hyde et al. 2013, Doilom et al. 2018) such as immersed, subglobose, black ascomata, 8-spored, bitunicate, thick-walled, obpyriform asci and multi-seriate, oblong to long ellipsoid, hyaline, 1-septate ascospores. Based on morphological data and unavailability of sequence data, we tentatively place Bonaria in Naetrocymbaceae.

 

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