K.D. Hyde & Goh, Mycological Research 103 (11): 1420 (1999)


incertae sedis


incertae sedis


incertae sedis


Helicorhoidion S. Hughes, Canadian Journal of Botany 36 (6): 773 (1958)

Type species:

Helicorhoidion botryoideum (Cooke) S. Hughes, Canadian Journal of Botany 36 (6): 773 (1958)

Marine species:

Helicorhoidion nypicola K.D. Hyde & Goh, Mycological Research 103 (11): 1420 (1999)

Index Fungorum Number: 460788                         Faces of fungi Number:N/A

Saprobic, asexual morph: Colonies on natural substratum effuse to compact, granular, black glistening. Mycelium partly immersed and partly superficial, hyaline to pale brown, branched, septate, smooth, 3-4 µm wide. Conidiophores macronematous, unbranched or rarely branched, flexulose, pale brown, smooth, 1-4-septate, 30-70 x 2-5.4 µm wide. Conidiogenous cells integrated, indeterminate, terminal or intercalary, polydenticulate. Conidia holoblastic, solitary, dry, seceding from the denticles by schizolysis, ellipsoidal or globoid, irregularly helicoid, very tightly coiled, multiseptate, strongly constricted at the septa, smooth, medium brown, 15-20 x 12-15 µm. Sexual morph: Undetermined.

Description based on Hyde et al. 1999.


Key references:

Hyde KD, Goh TK, Lu BS, Alias SA (1999). Eleven new intertidal fungi from Nypa fruticans. Mycological Research. 103(11): 1409–1422.

Loilong A, Salayaroj J, Ringjindamain, Choeyklin R, Jones EBG (2012). Biodiversity of fungi on the palm Nypa fruticans. In: Marine and fungal–like organisms.  (eds EBG Jones, KL Pang), De Gruyter, Germany, pp. 273–290.

Wijayawardene DNN, Hyde KD, Rajeshkumar KC, Hawksworth DL et al. (2017).  Notes for genera: Ascomycota. Fungal Diversity 86: 1–594.

Type & Location:
Other Specimens:
On intertidal petiole base of Nypa fruticans.
Brunei, Malaysia, Thailand.
Pertinent Literature:
Description based on Hyde et al. 1999.
NOTES: Jones et al. (2015) referred Helicorhoidion nypicola to the Dothiediomycete genera incertae sedis, but it is better regarded as Ascomycota family/genera incertae sedis as there are no cultures or sequence data available for this genus, currently six species are assigned to the genus. Helicorhoidion nypicola is the only species found in marine habitats. The species does not appear to be common although it was collected at six mangroves in Thailand on N. fruticans. It occurred at a frequency of 26–27 % at Satun and Chachoengsao mangroves (Loilong et al. 2012). Loilong et al. (2012) list it as host specific on N. fruticans. Helicorhoidion nypicola needs to be recollected, isolated and sequenced to determine its higher classification placement (Wijayawardene et al. 2017).


Mushroom Research Foundation 
Chiang Rai 


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