Pleosporales » Phaeosphaeriaceae » Amarenomyces

Amarenomyces dactylidis

Amarenomyces dactylidis Mapook, Camporesi & K.D. Hyde, in Hyde et al., Fungal Divers 87: 78 (2017)

Index Fungorum number: IF557841,        Facesoffungi number: FoF 07933


Sexual morph: Ascomata 170–230 μm high, 160–260 μm diam., scattered, solitary, semi-immersed to superficial, visible as raised, black dots on the host surface, globose to subglobose, uniloculate, glabrous, ostiole central, with minute, papilla (20–45 × 25–55 μm, l/w), 9 fissitunicate, cylindrical to cylindric-clavate, short pedicellate, with furcate pedicel, apically rounded, with well-developed ocular chamber. Ascospores (19–)(23–)25–28(–32) × 4.5–6 μm (x̅ = 26.1 × 5.5 μm, n = 50), overlapping

1–2-seriate, yellowish brown to brown, fusiform to subcylindrical, slightly narrower towards the end cells, asymmetrical, 7–8-septate, slightly constricted at the septa, enlarged at the 5th or 6th cell from above, flattened at the 2nd to 4th, or 5th cells, smooth-walled, surrounded by a distinct mucilaginous sheath. Asexual morph: Undetermined.


Culture characteristics: Colonies on PDA reaching 35–38 mm diam. after 3 weeks at room temperature (20–30 ºC). Colony dense, irregular in shape, flattened to slightly raised, surface smooth, with edge undulate, velvety to floccose; from above, initially white, with pale grey at the centre, becoming greenish grey after 4 weeks; from below, white to pale yellowish at the margin, dark brown at the centre, becoming black after 4 weeks; not producing pigmentation on agar medium.


Habitat: -


Known hosts: -On dead aerial stems of Dactylis glomerata and on dead fronds of a fern


Known distribution: Poaceae, Italy, Yunnan Province, China


Material examined: CHINA, Yunnan Province, Baoshan, Shuizai, Dawazi mountain, on dead fronds of a fern, 22 October 2015, I.D. Goonasekara, BS008 (KUNHKAS 102230), living culture, KUMCC 18-0154.


GenBank Accession No: ITS: MK356371, LSU: MK356345,, SSU: MK356359..


Notes: Multigene phylogenetic analyses show that the new strain KUMCC 18-0154 is sister to Amarenomyces dactylidis (MFLUCC 14-0207) with high support (98% ML and 1.00 BYPP). A comparison of ITS nucleotide base pairs shows that KUMCC 18-0154 is identical (1/541 bp) to A. dactylidis and thus, we identify our new isolate as A. dactylidis. Our isolate (KUN-HKAS 102230) shares a size range of the ascomata, asci and ascospores as well as the ascospore septation with the type (MFLU 17-0498). Although, our isolate is slightly larger in ascomata, asci and ascospores, but ITS sequence data showed that they are conspecific (Hyde et al. 2017). Therefore, A. dactylidis is reported from a fern in Yunnan, China for the first time.


Figure X. Amarenomyces dactylidis (KUN-HKAS 102230). a Appearance of ascomata on host. b Section through ascoma. c Section through peridium. d Cellular pseudoparaphyses. e–h Asci. i–n Ascospores. o Ascospore stained with Indian ink. p Ascospore germination. Scale bars a = 200 lm, b = 50 lm, c–h = 20 lm, i–p = 10 lm

Reference: 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 Diversity (2019) 95:1–273


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project entitled:

"The future of specialist fungi in a changing climate: baseline data for generalist and specialist fungi associated with ants Rhododendron species and Dracaena species"

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"Impact of climate change on fungal diversity and biogeography in the Greater Mekong Sub-region"

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    1 Center of Excellence in Fungal Research
  • Mae Fah Luang University Chiang Rai
    57100 Thailand
  • 2 Kunming Institute of Botany
  • Chinese Academy of Sciences,
  • Honghe County 654400, Yunnan, China

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