Fungalpedia – Note 1513, Dialaceniopsis
Dialaceniopsis. Bat.
Index Fungorum, Facesoffungi, MycoBank, GenBank, Fig 1
Classification: Englerulaceae, Incertae sedis, Incertae sedis, Dothideomycetes, Pezizomycotina, Ascomycota, Fungi
Hypophyllous on Landolphia ugandensis. Sexual morph: undetermined. Asexual morph: Conidiomata brown, pycnidial, superficial, globose, collapsing to collabent at maturity, unilocular, setose, ostiolate. Ostiole single, circular, centrally located. Conidiomatal setae dark brown, paler near the apices, radiated to reflexed, straight or flexuous, septate, smooth-walled, often adherent to the superficial mycelium. Conidiomatal wall composed of thin-walled, dark brown cells of textura angularis. Conidiophores formed from the innermost layer wall cells of the conidiomata, reduced to conidiogenous cells. Conidiogenous cells pale brown to hyaline, enteroblastic, annellidic, doliiform to ampulliform, indeterminate, smooth-walled, with 1–4 conspicuous percurrent proliferations toward apex. Conidia hyaline, fusiform, with obtuse apex and truncate base, 1-septate, smooth-walled, eguttulate (Sutton 1980).
Notes: Dialaceniopsis is a monotypic genus. The sexual morph of Dialaceniopsis landolphiae was referred to Rhytidenglerula landolphiae (Hansf.) Arx (Sutton 1980). However, Sivanesan (1984) assigned the asexual morph of Rhytidenglerula to Capnodiastrum Speg. Wijayawardene et al. (2017b) kept Dialaceniopsis as a legitimate name and placed it in Ascomycota, genera incertae sedis, because of lack of molecular data. Future studies with fresh collections and cultures are needed.
Type species: Dialaceniopsis landolphiae Bat., Anais Soc. Biol. Pernambuco 16(1): 141 (1959).
Figure 1 – Dialaceniopsis landolphiae (redrawn from Sutton 1980) a Condia. b Surface view of conidioma with setae. c Conidiogenous cells and developing conidia.
References
Li WJ, McKenZie EHC, Liu JK, Bhat DJ, Dai DQ, Caporesi E, Tian Q, Maharachcikumbura SSN, Luo ZL, Shang QJ, Zhang JF, Tangthirasunun N, Karunarathna SC, Xu JC, Hyde KD (2020) Taxonomy and phylogeny of hyaline-spored coelomycetes. Fungal Diversity 100: pages279–801.