(Wallr.) S. Hughes, Canadian Journal of Botany 36 (6): 785 (1958)






Synonymy: =Melanconium putredinis Wallr., Flora Cryptogamica Germaniae 2: 181 (1833) [MB#147443], =Piricauda putredinis (Wallr.) R.T. Moore, Rhodora 61: 103 (1959)

Monodictys S. Hughes, Can. J. Bot. 36: 785 (1958)
Type species: Monodictys putredinis (Wallr.) S. Hughes

Asexual morph: Hyphae septate, branched, thin-walled, hyaline to brown or fuscous. Conidiophores hyalines to sub-hyaline, septate, simple or sparingly branched, 8-200 x 1.5-6 μm. Conidia dark brown to fuscous, basal cell hyaline, muriform, pyriform, oblong ovoid, spherical, slightly constricted at the septa, 20-28 (-44) x 16-24 μm. In culture the conidia are more variable in shape and larger. (Descriptions based on Jones (1963)).

Another marine species with a Monodictys asexual morph.

Nereispora cristata (Kohl.) E.B.G. Jones, R.G. Johnson & S.T. Moss,

Peritrichospora cristata Kohlm., Nova Hedwigia 2: 324 (1960)

Corollospora cristata (Kohlm.) Kohlm., Transactions of the British Mycological Society 57 (3): 477 (1971)

Asexual morph:

Piricauda pelagica T.W. Johnson, J. Elisha Mitchell Scient. Soc. 74: 42 (1958)

= Piricuada articoceanourm R.T. Moore, Rhodora 61: 95 (1958)

Asexual morph: Hyphae septate, rarely branched, dark brown or fuscous. Conidiophores short or lacking, cylindrical, zero to two-septate, simple, lateral, dark brown. Conidia 15-41(-44) μm × 12.5-37 μm, obpyrifrom, ovoid or rarely subglobose, muriform, not or slightly constricted at the septa, smooth, black, with one to three yellowish or light brown basal cells, solitary, the septation is only visible in immature conidia. Chlamydospores 48-155 μm × 6.5-21 μm, dark brown, intercalary, catenulate, composed of 4-25 cells, chains simple, rarely muriform. Sexual morph: Nereiospora cristata, see this website. (Descriptions based on Pang et al. (2011)).

SUBSTRATA: saprobic on driftwood, intertidal wood, dead mangrove wood, test panels, Juncus, Spartina, Typha.

WORLDWIDE DISTRIBUTION: Andaman Islands, Australia, Brunei, Canada, Chile, Denmark, England, France, Gambia, Germany, Hong Kong, Iceland, India, Iceland, Ireland, Italy, Ivory Coast, Japan, Kuwait, Malaysia, Mexico, New Zealand, Panama, Portugal, Russia, Scotland, Seychelles, Sierra Leone, Spain, Sweden, Taiwan, Thailand, USA, Wales.

NOTES: This is a very common species and it appears more often than its teleomorph Nereiospora cristata (Mouzouras & Jones 1985).

Key references:

Jones EBG (1963) Marine fungi II. Ascomycetes and deuteromycetes from submerged wood and drift Spartina. Transactions of the British mycological Society 46(1): 135-144.

Mouzouras R, Jones EBG. (1985) Monodictys pelagica, the anamorph of Nereiospora cristata (Halosphaeriaceae). Canadian Journal of Botany 63: 2444-2447.

Moore RT (1959) The genus Piricuada (Deuteromycetes). Rhodora 61: 87-120.



Type & Location:
Other Specimens:
saprobic, on driftwood, and Scots pine test blocks submerged at low water mark, Aberystwyth, Wales, on test blocks submerged at Langstone harbour, Portsmouth, Sutton harbour Plymouth. Primarily terrestrial on wood substrates.
Pertinent Literature:
NOTES: The dematiaceous hyphomycete genus Monodictys is polyphyletic and species need to be isolated and sequence to determine their taxonomic placement but two unidentified species have been show to group in the Parabambusicolaceae. Monodictys putredinis was referred to Piricauda by Moore (1959), but this has not been universally accepted. Jones (1963) examined type material of M. putredinis (=Melanconium putredinis) and compared conidial measurements of various collections: 14.4-21-6 x 18-32 μm (type material, 16-24 x 20-28 μm (Jones UK material) and 15.5-36.5 x 29-39.5 μm (Moore, 1959). The species was shown to induce soft rot decay of wood (Jones 1963). The species needs further collection, isolation and sequencing to determine its taxonomic affinity.


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