Genus

Nemania

Species

maritima

Author

Y.M. Ju & J.D. Rogers

Class

Sordariomycetes, Subclass Xylariomycetidae

Order

Xylariales

Family

Xylariaceae

Synonymy:

Description

Sexual morph: Stromata 0.5-0.6 mm diam., scattered, subglobose to globose, enclosing one to several perithecia, erumpent, with lower to middle part embedded in the substrate, surface dark-brown, smooth, carbonaceous immediately beneath the surface and between the perithecia, tissue beneath the perithecial layer inconspicuous. Ostioles obtusely conical, black. Peridium one-layered, composed of cells of textura angularis with large lumina, merging with the wood. Asci 80-100 μm × 6-9 μm, short-stipitate, with apical ring blueing in Melzer’s iodine reagent, cuneate, 1.5 μm high, 3 μm diam. Ascospores 9-12 × 5-6(-6.5) μm, light brown to brown, unicellular, ellipsoidal, with broadly rounded ends, with straight germ slit much less than spore-length. Asexual morph: undetermined.

Key references:

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.

Ju YM, Rogers JD. (2002) The genus Nemania (Xylariaceae). Nova Hedwigia 74: 75-120.

Li GJ, Hyde KD, Zhao EL, Hongsanan S, Abdel-Aziz FA, Abdel-Wahab MA, Alvarado P et al. (2016) Fungal diversity notes 253–366: taxonomic and phylogenetic contributions to fungal taxa. Fungal Diversity (add data latter). DOI 10.1007/s13225-016-0366-9.

Whalley AJS, Jones EBG, Hyde KD, Læssøe T. (2000) Halorosellinia gen. nov. to accommodate Hypoxylon oceanicum, a common mangrove species. Mycological Research 104: 368-374.

Image: Nemania maritima. (a) Black, exposed ascomata on wood. (b) Section of globose ascoma with a short papilla. (c) One-layered peridium of cells of textura angularis with large lumina, merging with the wood tissue. (d) Cylindrical thin-walled ascus with an apical
apparatus. (e) Ascospore, dark-coloured, unicellular. Scale bar: a=200 μm; b=100 μm; c=30 μm; d=10 μm; e=5 μm. Photo reproduced with the permission of the National Taiwan Ocean University.

Type & Location:

Other Specimens:

Substratum:

dead mangrove wood.

Habitat:

Distribution:

Bahamas, Denmark, England, Hong Kong, Malaysia, Taiwan, Thailand.

Pertinent Literature:

Nova Hedwigia 74: 102 (2002)

Comments:

This species is known only from a few locations and was described from material collected in Taiwan (Ju & Rogers 2002). This species can be easily confused with Halorosellinia oceanica, which produces a dark pseudostroma and dark ascospores (Whalley et al. 2000). However, ascospores of N. maritima are smaller, and a pronounced decolourization of the wood around the stroma can be observed. Ju & Rogers (2002) suggested that a new genus could be created to accommodate N. maritima. Currently 81 Nemania names are listed in MycoBank, but N. maritima is the only species known from mangrove/marine habitats, usually on mangrove wood (Jones et al. 2015). In a multigene study N. maritima forms a sister clade to the type species N. serpens (Li et al. 2016).

Images

Fig 2