Download Copy a link to this page Cite this record

Rimbachia Pat. 1891

Scientific name record
Names_Fungi record source
Is NZ relevant
This is the current name
This record has descriptions

Click to collapse Biostatus Info

Present
New Zealand
Political Region

Click to collapse Nomenclature Info

Pat.
Pat.
1891
159
ICN
Rimbachia Pat. 1891
genus
Rimbachia

Click to collapse Classification Info

Rimbachia

Click to collapse Descriptions Info

Small, thin-fleshed but tough and leathery, saprobic basidiomycetes with shelf-like fruiting bodies on mosses. Globose to subglobose spores. The hymenial surface is folded rather than gill-like. Cheimonophyllum and Anthracophyllum are morphologically similar but grow on dead wood.

Three species have been reported from New Zealand, only those listed below have descriptions or images available from NZFungi.

The taxonomic position of some cyphellaceous fungi has long been somewhat controversial, particularly for those occurring on mosses. The genus Mniopetalum was erected for those species of Leptoglossum which are associated with mosses and lack membrane pigments. Some like M. globisporum Donk lack lamellae while others like M. bryophilum (Pers.) Donk are distinctly agaricaceous when fully developed. In a more recent re-evaluation of species formerly placed in the genus Leptoglossum, Redhead (1984) reclassified about half the species in two major groupings, Arrhenia Fr. and Rimbachia Pat., Rimbachia replaced Mniopetalum Donk & Singer, a later congeneric name (Redhead 1984), and was extended to include Pleuromycenula Singer, while Rimbachia palmivora Singer was excluded as not being congeneric. Both genera would then be muscicolous, with lack of pigment being the most conspicuous feature separating Rimbachia from the pigmented Arrhenia. Singer (1986), however, does not accept Redhead's broader generic concept for the genus Rimbachia, stressing the inconsistencies associated with using habitat characters generically in this context. In two recent publications describing new species, Zang (1986) and Manimohan & Leelavathy (1988) have both followed Singer in retaining the genus Mniopetalum. The genus Mniopetalum is widespread, having been recorded from Europe, Asia, India, North and South America, and New Zealand. Cunningham (1953) recorded for New Zealand a species of the reduced genus Cyphella, C. muscigena Pers: Fr., which he believed to be the same as the European and North American species. This report was based on a collection with 1- and 2-spored basidia that compared well with the type of Singer's Mniopetalum bisporum (recombined as Rimbachia arachnoidea subsp. bispora (Singer) Redhead (Redhead 1984)). Another collection from New Zealand made by Horak was identified by Redhead (1984) as Mniopetalum megalosporum Singer (recombined as R. neckerae subsp. megalospora (Singer) Redhead). Both species are easily distinguishable, R. arachnoidea subsp. bispora having 2-spored basidia, smaller spores (7-9 x 5-6 µm), and a slightly wrinkled to venose hymenophore (Cunningham 1953; Singer 1966), whereas R. neckerae subsp. megalospora has 4-spored basidia, somewhat larger, more elongate spores (8.5-10 x 4-5.5 µm), and a smooth hymenophore (Singer 1969). Following is a description of a further species of Mniopetalum recently found in New Zealand on Hypnodendron colensoi (Hook.f. & W.Wilson) Mitten. This is quite distinct from the above species in having a distinctly venose hymenophore, small, spherical spores, and 4-spored basidia. This appears to be identical with Mniopetalum bryophilum (Pers.: Fr.) Donk.

Click to collapse Taxonomic concepts Info

Mniopetalum Donk & Singer (1962)
Rimbachia Pat. 1891
Rimbachia Pat. (1891)
Rimbachia Pat. 1891
Rimbachia Pat. (1891)
Rimbachia Pat. 1891

Click to collapse Notes Info

taxonomic status
Taxonomic placement uncertain but sequences suggest affiliation with Omphalina, tentatively in Fayodiaceae [JAC 2014]

Click to collapse Metadata Info

1cb1cb0a-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2001
21 December 2023
Click to go back to the top of the page
Top