Labyrinthomyces sp. B.C. Zhang & Minter 1988
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Nomenclature
Classification
Descriptions
Labyrinthomyces sp. B.C. Zhang & Minter 1988
The collection of Labyrinthomyces sp. from New Zealand (PDD 48338) comprised a single ascoma. We consider this does not provide enough information to resolve its taxonomic status. Based on Dr. Beaver's [sic] unpublished descriptions and our examination of the specimen, a short description follows.
Ascomata globose, about 20 mm diam, dark brown, surface covered with poorly defined, minute warts (up to 500 µm in the largest dimension at the base). Peridium 1-1.5 mm thick, of two distinct layers. Gleba yellowish white to brown, composed of elongated, straight, sinuous or rounded, labyrinthine chambers lined with hymenium but. becoming empty. Paraphyses about 150 x 3 µm. Asci not seen. Ascospores globose, (18-)19-21(-22) µm diam excluding ornamentation, with walls about 1 µm thick, often containing one large droplet or two smaller ones, smooth when young, later becoming irregularly ornamented with hemispherical warts up to 3.5 µm diam.
In both gross and microscopic morphology this collection seems rather similar to L. varius, especially in glebal structure and ascospores. Its uneven ascomatal exterior is, however, somewhat different from L. varius. We cannot confidently recognise this fungus as a distinct taxon on the basis of this single collection. Information about the asci and paraphyses would be needed from further collections to resolve its taxonomic status. It seems probable, however, that like the other two species described earlier, it belongs in the subgenus Labyrinthomyces.