Genus

Hydea

Species

pygmea

Author

(Kohlm.) K.L. Pang and E.B.G. Jones, Mycol. Progr. 9: 549 (2010)

Class

Sordariomycetes, Subclass Lulworthiomycetidae

Order

Lulworthiales

Family

Lulworthiaceae

Synonymy: ≡ Cirrenalia pygmea Kohlm., Ber. Drsch. Bot. Ges. 79: 35, 1966.

Description

Hydea K.L. Pang and E.B.G. Jones, Mycol. Progr. 9: 549 (2010)

Type species:

Hydea pygmea (Kohlm.) K.L. Pang and E.B.G. Jones, Mycol. Progr. 9: 549 (2010)

≡ Cirrenalia pygmea Kohlm., Ber. Drsch. Bot. Ges. 79: 35, 1966.

Asexual morph: saprobic, hyphae 2.2-4.5 µm in diameter, septate, ramose, fuscous. Conidiophores obsolete. Conidia acrogenous, solitary, helicoid, contorted I or 1 time coiled, 3-4-septate, not or slightly constricted at the septa, fist-shaped or reniform, black or fuscous, fulgent (upper three cells dark, lower two or three cells light-colored); cells increasing in diameter from base to apex, distinctly dissimilar; spirals 25.5-31×28.5-34 µm; terminal cell 16.5-23 µm in diameter, subglobose to reniform, basally flattened; basal cells 3.5-5.5 µm in diameter; central cells irregularly conical or almost wedge-shaped. Sexual morph: Undetermined (Description based on Kohlmeyer and Kohlmeyer (1979)).

Key references:

Abdel-Wahab MA, Pang KL, Nagahama T, Abdel-Aziz F, Jones EBG (2010) Phylogenetic evaluation of anamorphic species of Cirrenalia and Cumulospora with the description of eight new genera and four new species. Mycological Progress 9:537–558.

based on morphological and molecular data. Mycologia 95: 530-552.

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.

Kohlmeyer J, Kohlmeyer E (1979) Marine Mycology: The higher fungi. Academic Press.

Maharachchikumbura SSN, Hyde KD, Jones EBG, Mckenzie EHC, Huang SK, Abdel-Wahab MA et al. (2015) Towards a natural classification and backbone tree for Sordariomycetes. Fungal Diversity 72: 199-299.

Type & Location:

Other Specimens:

Substratum:

Decayed driftwood in the intertidal zone, especially on mangrove wood.

Habitat:

Distribution:

Brazil, Brunei, China, Fiji, Hong Kong, India, Liberia, Malaysia, Maldives, Seychelles, Mauritius, Mexico, Sierra Leone, Singapore, Sri Lanka, Sumatra, Thailand, Trinidad.

Pertinent Literature:

Comments:

NOTES: Hydea pygmea is a common species on mangrove wood, especially Rhizophora species, growing on the bark, with slow growth in culture but sporulating readily. The fungus differs from all other Cirrenalia-like species by the dark-brown to black hooked nature of the conidia. Hydea pygmea is characterized by internal proliferation of the conidia (Kohlmeyer & Kohlmeyer 1979). Sequence data placed Cirrenalia pymea in the Lulworthiaceae (Abdel-Wahab et al. 2010) with the introduction of a new genus Hydea to accommodate it as it did not belong in the Cirrenalia clade. The genus is accepted as a member of the Luloworthiaceae (Luloworthiales) in the subclass Lulworthiomycetidae by Jones et al. (2015) and Maharachchikumbura et al. (2015).

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