Pleosporales » Dothidotthiaceae

Belizeana

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

 

Belizeana Kohlm. & Volkm.-Kohlm., Bot. Mar. 30(3): 195 (1987)

Pathogenic or saprobic on Laguncularia sp. Sexual morph: Ascomata solitary, scattered, or clustered or somewhat gregarious, erumpent, subglobose, medium-sized, dark brown to black, pale brown on the sides, ostiolate, epapillate or shortly papillate. Peridium comprising a few layers of thin-walled cells of textura angularis, hyaline towards the inside, basal region giving rise to hyaline hyphal mass producing asci. Hamathecium of dense, ca. 2 μm broad, filliform pseudoparaphyses, rarely branched, embedded in gelatinous matrix. Asci 8-spored, bitunicate, fissitunicate, broadly cylindrical to clavate, with a short pedicel, thick-walled, rounded at apex, with an ocular chamber. Ascospores uniseriate, partially overlapping, broadly ellipsoidal, hyaline when immature, pale brown to chestnut when mature, 1-septate, constricted at the septum, thick-walled, 2-layered, mature spores with tuberculate ornamentation between the two layers. Asexual morph: undetermined.

Type species Belizeana tuberculata Kohlm. & Volkm.-Kohlm.

Notes – The monotypic genus Belizeana was introduced by Kohlmeyer & Volkmann-Kohlmeyer (1987) with Belizeana tuberculata as type species. The genus is characterized by distinct subglobose to ampulliform ascomata, eight-spored, cylindrical asci and one-septate, thick, walled, pale brown ascospores. Belizeana was previously accommodated in Pleosporaceae by Volkmann-Kohlmeyer (1987). Later, it was transferred to Elsinoaceae by Lumbsch & Huhndorf (2010). Recently, Belizeana was accepted as a genus in Dothideales incertae sedis (Jones et al. 2015). The asexual morph is coelomycetes (Kohlmeyer & Volkmann-Kohlmeyer 1987). Cultures and sequences are unavailable for the type species. We re-examined the type specimen of B. tuberculata from IMS under no. 4209 and found comparable morphological characters to Dothidotthia symphoricarpi, such as subglobose, dark brown to black ascomata, clavate to cylindrical asci and 1-septate, ellipsoidal, pale brown ascospores. Based on morphological characters, we transfer the genus Belizeana to Dothidotthiaceae, Pleosporales.

 

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