Distoseptisporales » Distoseptisporaceae » Distoseptispora

Distoseptispora palmarum

Distoseptispora palmarum S.N. Zhang, K.D. Hyde & J.K. Liu, in Hyde et al., Fungal Diversity: 10.1007/s13225-019-00429-2, [145] (2019)

Index Fungorum number: IF555431         Facesoffungi number: FoF05090

 

Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies on the substratum superficial, effuse, hairy or velvety, black. Mycelium mostly immersed, composed of branched, septate, smooth, pale brown hyphae. Conidiophores 90–165 µm long (x̄ = 125 µm, n = 10), 4–7 µm wide (x̄ = 5.5 µm, n = 10), macronematous, mononematous, septate, unbranched, single or in groups of 2 or 3, erect, straight or flexuous, smooth, brown, cylindrical, robust at the base. Conidiogenous cells polyblastic, integrated, determinate, terminal, pale brown to brown, cylindrical. Conidia 35–180 µm long (x̄ = 76.3 lm, n = 32), 7–11 µm wide (x̄ = 8.6 µm, n = 32), acrogenous, dry, oblong, obclavate, cylindrical or rostrate, elongated, straight or curved, truncate at the base, rounded at the apex, 7–27-distoseptate, smooth, greenish black to brown, paler towards the apex, thick-walled.

 

Culture characteristics: Colonies on PDA, 20–25 mm diam. after 21 days at 25 °C, mycelium sparse, dark brown to black, reverse concolourous.

 

Host and Habitat: Saprobic on rachis of Cocos nucifera (Arecaceae).

 

Known distribution: Thailand.

 

Material examined: THAILAND, Trat Province, Koh Chang, on rachis of Cocos nucifera (Arecaceae), 27 April 2017, S.N. Zhang, SNT128 (MFLU 18-0588, holotype), ex-type living culture MFLUCC 18-1446; ibid., HKAS 102209 (isotype).

 

GenBank Accession No: ITS: MK085062, LSU: MK079663, RPB2: MK087670, SSU: MK079661, TEF1: MK087660.

 

Figure X. Distoseptispora palmarum (MFLU 18-1588, holotype). a Colonies on substrate surface. b, c Conidiophores with conidiogenous cells bearing conidia. d Conidiophore. e Conidiogenous cells. f–i Conidia. Scale bars: a = 200 μm, b–d = 50 μm, e = 10 μm, f–h = 20 μm, i = 50 μm.

 

Notes: Distoseptispora palmarum shares similar conidial features to other species of Distoseptispora, but its conidiophores are longer than most Distoseptispora species (Luo et al. 2018; Tibpromma et al. 2018; Yang et al. 2018; Phookamsak et al. 2019). Distoseptispora palmarum is similar to D. leonensis (= Ellisembia leonensis) (McKenzie 1995; Shenoy et al. 2006; Su et al. 2016), D. suoluoensis and D. guttulata (Yang et al. 2018). However, D. palmarum is distinct because of its polyblastic conidiogenous cells. Multi-gene analysis based on LSU, ITS, TEF1 and RPB2 indicates that D. palmarum and D. leonensis constitute a well-supported independent lineage (Hyde et al. 2019). However, D. palmarum differs from D. leonensis in the length and number of distosepta in the conidia.

 

Reference:

1. Hyde KD, Tennakoon DS, Jeewon R, Bhat DJ et al. (2019) Fungal diversity notes 1036–1150: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Divers. 96: 1–242.

2. Luo ZL, Hyde KD, Liu JK, Bhat DJ, et al. (2018) Lignicolous freshwater fungi from China II: Novel Distoseptispora (Distoseptisporaceae) species from northwestern Yunnan Province and a suggested unified method for studying lignicolous freshwater fungi. Mycosphere 9: 444–461.

3. McKenzie EHC (1995) Dematiaceous hyphomycetes on Pandanaceae 5. Sporidesmium sensu lato. Mycotaxon 56:9–29

4. Phookamsak R, Hyde KD, Jeewon R, Bhat DJ, et al. (2019) Fungal diversity notes 929–1035: taxonomic and phylogenetic contributions on genera and species of fungi. Fungal Divers 95: 1–273.

5. Shenoy BD, Jeewon R, Wu WP, Bhat DJ, Hyde KD (2006) Ribosomal and RPB2 DNA sequence analyses suggest that Sporidesmium and morphologically similar genera are polyphyletic. Mycol Res. 110:916–928

6. Su H, Hyde KD, Maharachchikumbura SSN, Ariyawansa HA, et al. (2016) The families Distoseptisporaceae fam. nov., Kirschsteiniotheliaceae, Sporormiaceae and Torulaceae, with new species from freshwater in Yunnan Province, China. Fungal Divers 80: 375–409.

7. Tibpromma S, Hyde KD, McKenzie EHC, Bhat DJ, et al. (2018) Fungal diversity notes 840–928: micro-fungi associated with Pandanaceae. Fungal Divers 93: 1–60.

8. Yang J, Maharachchikumbura SSN, Liu JK, Hyde KD et al. (2018) Pseudostanjehughesia aquitropica gen. et sp. nov. and Sporidesmium sensu lato species from freshwater habitats. Mycol Prog 17: 591–616.

 

 

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