Dictyocheirospora aquadulcis

Dictyocheirospora aquadulcis Sorvongxay, S. Boonmee & K.D Hyde, in Hyde et al., Fungal Diversity: 10.1007/s13225-019-00429-2, [23] (2019)

Index Fungorum number: IF556308         Facesoffungi  number: FoF05963

Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies on natural substrate, superficial, scattered. Mycelium immersed, branched, septate, pale brown, smooth-walled. Conidiomata 117–412 µm diam., slightly, pulvinate, dark brown. Conidiophores micronematous, undifferentiated from vegetative hyphae. Conidiogenous cells, holoblastic, integrated, terminal, pale brown. Conidia 60–80 µm × 17–29 µm (x̅ = 70 × 24 µm, n = 20), solitary, cheiroid, ellipsoid to cylindrical, rounded at the apex, consisting of 7 rows of cells, with each row composed of 11–14 cells, with rows digitate, cylindrical, inwardly curved at apex, arising from a basal cell, euseptate, slightly constricted at septa, brown, smooth-walled.

Culture characteristics: Conidia germinated on WA within 24 h. Colonies on MEA reaching 0.2–0.5 cm diam., in 5 days at 25 ℃, with wavy margins, initial white and later becoming gray.

Habitat: Saprobicon on decaying wood, in flowing freshwater stream.

Known distribution: Thailand

Material examined: THAILAND, Pha Yao Province, on decaying wood, in flowing freshwater stream, 11 September 2017, Saranyaphat Boonmee (PK12), (MFLU 18–1088, holotype), ex-type living culture (MFLUCC 17–2571).

GenBank numbers: ITS: MK634542, LSU: MK634545.

Notes: Dictyocheirospora aquadulcis is similar to D. heptaspora in having the same conidial shape and size. However, it differs in having elongate conidia with 11–14 septa, whereas D. heptaspora has ellipsoidal conidia with 10–11 septa. Phylogenetically, D. aquadulcis clustered with D. heptaspora with moderate bootstrap support. We therefore, introduce D. aquadulcis as a new species in this study based on its morphological distinctness.