Distoseptisporales » Distoseptisporaceae » Distoseptispora

Distoseptispora tectonae

Distoseptispora tectonae Doilom & K.D. Hyde, in Hyde et al., Fungal Diversity 80: 222 (2016)

Index Fungorum number: IF552223         Facesoffungi number: FoF01877

 

Sexual morph: Undetermined. Asexual morph: Colonies on natural substrate, superficial, numerous, hairy, darkbrown, scattered, single or in groups. Conidiophores up to 40μm long, 4–6μm wide, macronematous, mononematous, simple, erect to slightly curved, unbranched, 2–4-septate, slightly constricted at the septa, pale brown to darkbrown, cylindrical. Conidiogenous cells 7.5–9.5 × 3.5–5μm, monoblastic, integrated, terminal, cylindrical. Conidia (90–)130–140(–170) × (11–)13–14(–16) μm ( `x = 128 × 14μm, n = 20), 3.5–5.5μm wide at the protruding truncate base (rostrum), 20–28-distoseptate, flexuous, cylindric-obclavate, elongate, straight or slightly curved, rounded at the apex, obconically truncate at the base, verruculose, dark reddish brown, slightly paler towards the apex, thick-walled, smooth, secession schizolytic.

 

Culture characteristics: Conidia germinating on PDA within 24 h. Germ tubes produced at the apex and septa of conidia. Colonies on MEA reaching 8–10μm diam. After 7 days in the dark at 25 °C ( `x = 8.9μm, n = 5), undulate, irregular shape, flat or effuse at the edge, velvety, brownish-grey (4E2) from above, olive brown (4F3) from below.

 

Habitat: -

 

Known hosts: -

 

Known distribution: -

 

Material examined: Thailand, Utaradit Province, on dead twig of Tectona grandis (Lamiaceae), 29 December 2012, M. Doilom (MFLU 15-3417, holotype), ex-type living culture MFLUCC 12-0291, MKT 030, ICMP21156; Phrae Province, Song District, on dead branch of T. grandis, 30 October 2011, M. Doilom, (MFLU15-3416), living culture MFLUCC 12-0288, MKT 025, ICMP 21154.

 

Notes: Distoseptispora tectonae is introduced here as a novel species based on its morphological and phylogenetic differences from known Distoseptispora species. Phylogenetically, D. tectonae lies in a subclade together with D. fluminicola McKenzie et al. 2016 and D. tectonigena sp. nov., but in a distinct lineage with support 67 %MPBS, 55 % MLBS and 1.00 PP. The conidia of D. tectonae ((90–)130–140(–170) × (11–) 13–14(–16)) are shorter and slightly narrower than those of D. fluminicola (125–250 × 13–15), D. adscendens ((80)350–500 × 15–18), and shorter and wider than D. tectonigena ((83–)148–225(–360) × (10–)11–12(–13)), but longer than those of D. leonensis ((38–)50–75 (–85) × 11–15). The conidia of D. tectonae also have more septa than those of D. leonensis, but fewer than those of D. adscendens, D. fluminicola and D. tectonigena. In addition, the conidiophores of D. tectonae are shorter than those of D. adscendens, D. leonensis and D. tectonigena, but longer than D. fluminicola.

 

 

Figure X. Distoseptispora tectonae (holotype). a Colonies on dead branch. b, c Conidia attached to conidiophores on host. d–f Conidia. g, h Conidia attached to conidiogenous cells and conidiophores. Scale bars d–h = 20μm.

 

Reference: Hyde KD, Hongsanan S, Jeewon R, Bhat DJ, et al. (2016) taxonomic and phylogenetic contributions to fungal taxa – Fungal diversity notes 367–490. Fungal Divers 80: 1–270.

 

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