Sebacina epigaea (Berk. & Broome) Rea 1932
Details
Sebacina epigaea (Berk. & Broome) Rea, Trans. Brit. Mycol. Soc. 17 48 (1932)
Sebacina epigaea (Berk. & Broome) Rea 1932
Nomenclature
(Berk. & Broome) Rea
Berk. & Broome
Rea
1932
48
ICN
species
Sebacina epigaea
Classification
Synonyms
Associations
Descriptions
Sebacina epigaea (Berk. & Broome) Rea 1932
On soil, Auckland, Huia, Jan 1966, J. M. Dingley, 24836.
Fructifications waxy-gelatinous, soft-gelatinous or cartilaginous, thick, effused, indeterminate, originating as small patches, coalescing to form irregular, undulate or tuberculate areas to 12 cm in longest dimension, white to greyish hyaline when fresh, drying to a cream or yellowish brown film or crust. In section to 1 mm thick, consisting of ascending layer and hymenium. Ascending layer composed of interwoven, distinct, septate, hyaline hyphae, 1.5-3 µm diam., clamp connections absent. Hymenium composed of dikaryophyses and basidia; dikaryophyses crowded, simple or sparingly and irregularly branched apically, projecting to 60 µm, beyond basidia, distinct; probasidia broadly elliptical, with basal septa. 15.5-19.8 x 11.8-15.5µm, becoming longitudinally cruciate-septate; sterigmata cylindrical, to 100 x 1.5-2.5 µm. Basidiospores obovate to broadly elliptical, often flattened on one side, hyaline, apiculate, 9.1-13.6 x 6.2-9.3 µm. Germination by repetition.
Soil, plant debris, or base of living plants.
Coker, J. Elisha Mitchell scient. Soc. 35: pi. 47. pl. 61, f. 1-5. 1920. (as Sebacina sp.); McGuire, Lloydia 4: 15, f. 3. 18, f. 15-21.1941.
Sebacina epigaea is characterised by conspicuous dikaryophyses forming a distinct palisade, and the absence of clamp connections. Angular resting spores with thickened walls and subulate appendages described by many workers were not observed in the above specimen.
The genus Sebacina has come to include a large and rather heterogeneous assemblage of species and there have been numerous attempts to divide it into smaller and more natural groups. Initial attempts resulted in the erection of a number of subgenera or sections, but in more recent years there has been a tendency to raise these taxa to generic rank and to divide the genus still further (Ervin, 1957; Wells, 1959; Luck-Alien, 1963). However, even amongst those workers who wish to divide Sebacina into segregates of generic rank, there has been little general agreement as to the limits of some of the resulting genera such as Exidiopsis and Bourdotia.
A number of workers (McGuire, 1941; Olive, 1958) have objected to this method of dividing the genus on the grounds that these taxa are linked by transitional species, and have preferred to recognise them merely as convenient subgeneric groups.
At the present state of knowledge it seems preferable to describe the fungi of this group occurring in New Zealand under Sebacina sensu lato until such time as the generic segregates have been more clearly defined. In this series of papers, McGuire's (1941) treatment of the genus is followed and the three sections recognised by him adopted, with the exception that the name of McGuire's section Eusebacina is altered to Sebacina to conform with the International Code of Botanical Nomenclature.
These sections may be distinguished as follows:
Gloeocystidia present, contents granular, yellow to brown at maturity ….. Sect. Bourdotia
Gloeocystidia absent, thick-walled, erumpent cystidia present ......... Sect. Heterochaetella
Gloeocystidia absent; highly differentiated cystidia absent ..……………... Sect. Sebacina
Bristol, England.
Taxonomic concepts
Sebacina epigaea (Berk. & Broome) Rea 1932
Sebacina epigaea (Berk. & Broome) Rea (1932)
Sebacina epigaea (Berk. & Broome) Rea 1932
Sebacina epigaea (Berk. & Broome) Rea (1932)
Sebacina epigaea (Berk. & Broome) Rea 1932
Sebacina epigaea (Berk. & Broome) Rea (1932)
Global name resources
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Identification keys
Metadata
1cb1a37a-36b9-11d5-9548-00d0592d548c
scientific name
Names_Fungi
1 January 2001
10 May 2011