K.D. Hyde, Mycol. Res. 99: 1462 (1995)








Sexual morph: Stromata up to 80 μm thick, forming a blackened crust on the host surface, with ectostromatal cushions occurring around each ascoma, comprising host cells and intracellular blackened fungal hyphae. Ascomata 520-650 μm high, 650-840 μm diam., globose or subglobose, with periphysate necks collectively erumpent through pustulate discs. Peridium up to 50 μm wide, composed of elongated cells, comprising outer few layers of pigmented, fungal and host cells, fusing with the stroma on the outside and inners layer of thin-walled, compressed, hyaline cells. Paraphyses up to 8 μm wide at the base, hypha-like, sparse, septate, hyaline, and tapering distally. Asci 28-50 × 3.6-6.4 μm, eight-spored, cylindric-clavate, long pedunculate, thin-walled, unitunicate, apically truncate, with a J- apical thickening. Ascospores 6.4-8 × 1.2-1.6 μm, allantoid, straight or mostly curved, hyaline to pale-yellow, unicellular. Asexual morph: Undetermined.

Key references:

Hyde KD. (1995) Eutypella naqsii sp. nov. from intertidal Avicennia. Mycological Research 99: 1462-1464.

Jones EBG, Suetrong S, Sakayaroj J, Bahkali AH, Abdel-Wahab MA, Boekhout T, Pang KL. (2015) Classification of marine Ascomycota, Basidiomycota, Blastocladiomycota and Chytridiomycota. Fungal Diversity 73: 1–72.

Maharachchikumbura SS, Hyde KD, Jones EBG, McKenzie EHC, Huang SK, Abdel-Wahab MA, Daranagama DA, Dayarathne M, D’souza MJ, Goonasekara ID, Hongsanan S, Jayawardena RS, Kirk PM, Konta S, Liu JK, Liu ZY, Norphanphoun C, Pang KL, Perera RH, Senanayake IC, Shang Q, Shenoy BD, Xiao YP, Bahkali AH, Kang JC, Somrothipol S, Suetrong S, Wen TC, Xu JC. (2015) Towards a natural classification and backbone tree for Sordariomycetes. Fungal Diversity 72: 199–301.

Maharachchikumbura SSN, Hyde KD, Jones EBG, McKenzie EHC, Bhat DJ, Dayarathne M, Huang SK, Norphanphoun C, Senanayake IC, Perera RH, Shang Q, Xiao Y, D’souza MJ, Hongsanan S, Jayawardena RS, Daranagama DA, Konta S, Goonasekara ID, Zhuang WY, Jeewon R, Phillips AJL, Abdel-Wahab MA, Al-Sadi AM, Bahkali AH, Boonmee S, Boonyuen N, Cheewangkoon R, Dissanayake AJ, Kang J, Liu JK, Liu X, Liu ZY, Pang KL, Phookamsak R, Promputtha I, Suetrong S, Wen T, Wijayawardene NN. (2016) Families of Sordariomycetes. Fungal Diversity 79: 1–317.


Image: Eutypella naqsii. (a) Section of immersed, globose ascoma. (b) One-layered peridium, composed of thick-walled, elongated cells. (c) Cylindrical, thin-walled ascus with an apical ring. (d) Light-colored, allantoid ascospore. Scale bar: a=100 μm; b=30 μm; c, d=10 μm. Photo reproduced with the permission of the National Taiwan Ocean University.

Type & Location:
Other Specimens:
saprobic on dead mangrove wood.
Australia, Taiwan, Thailand.
Pertinent Literature:
NOTES: This species is morphologically similar to Eutypa bathurstensis but differs in having small groups of ascomata developing under a blackened stroma and hyaline to pale yellow ascospores (Hyde 1995). Also, no anamorph has been reported for Eutypella naqsii. A molecular study is required to determine its relationship with other terrestrial Eutypella species. The genus Eutypella is polyphyletic and is in need of revision based on wider samples, with etypification of key species. The species is currently assigned to the Diatrypaceae until further studies are undertaken at the molecular level (Jones et al. 2015; Maharachchikumbura et al. 2015, 2016).
  • Fig 2
    Fig 2


Mushroom Research Foundation 
Chiang Rai 


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