Lasiodiplodia avicenniarum Jayasiri, E.B.G. Jones & K.D. Hyde, Mycosphere 10: 139. 2019.
Index Fungorum: IF555581; Facesoffungi: FoF05294; MycoBank: MB555581.
Saprobic on fruit of Avicennia marina. Sexual morph: Not determined. Asexual morph: Conidiomata up to 180–220 μm high × 160–180 μm diam. (x = 213 × 174 μm; n = 10), pycnidial, solitary to gregarious, occasionally confluent, formed in uni- or multi-loculate stromata, immersed, becoming erumpent at maturity, ostiolate. Ostiole central, circular, papillate. Conidiomata wall 40–50 μm wide (x = 43 μm; n = 20), composed of two layers, an outer of brown, thick-walled textura angularis and an inner layer of thin-walled hyaline cells. Conidiophores reduced to conidiogenous cells. Conidiogenous cells 15–18 × 5–8 μm (x = 17 × 7 μm; n = 30), phialidic or annellidic, hyaline, cylindrical, discrete or occasionally integrated, determinate or proliferating at the same level giving rise to periclinal thickenings, or proliferating percurrently. Conidia 26–32 × 11–14 μm (x = 28 × 12 μm; n = 30), aseptate, eguttulate or sometimes with a large central guttule, contents granular, smooth, thick-walled, oblong to cylindrical, straight, both ends broadly rounded, becoming dark brown and septate when aged.
Culture characteristics: Colonies reaching 70 mm diam. on MEA after 2 d. Cardinal temperatures for growth: opt 18 °C.
Representative isolate: Thailand, Krabi Province, Mueang Krabi District, on decaying fruit pericarp of Avicennia marina (Acanthaceae), 30 August 2017, S.C. Jayasiri, holotype MFLU 18– 2173, MFLUCC17–2591 (ex-type culture).
Hosts: Avicennia marina (Jayasiri et al. 2019).
Known distribution: Thailand (Jayasiri et al. 2019).
GenBank Numbers: SSU MK347884; ITS MK347777; LSU MK347994; tef1 MK340867
Notes: Phylogenetically, Lasiodiplodia avicenniarum closely related to L. brasiliensis, but can be distinguished from these species based on its morphology.
Jayasiri SC, Hyde KD, Jones EBG, McKenzie EHC, Jeewon R, Phillips AJL, Bhat DJ, Wanasinghe DN, Liu JK, Lu YZ, Kang JC, Xu J, Karunarathna SC (2019) Diversity, morphology and molecular phylogeny of Dothideomycetes on decaying wild seed pods and fruits. Mycosphere 10: 1–186.