A new species of Gastrosporium (Phallales) from coastal sand dune of Ibaraki Prefecture, central Japan

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Taiga Kasuya, Shota Hanawa, Kentaro Hosaka (2020) Truffology 3(1): 9–16
Submitted: 14 January 2020
Accepted: 8 March 2020
Published: 31 March 2020

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Abstract

A hypogeous basidiomycete fungus was collected in coastal sand dunes of Ibaraki Prefecture, central Japan. Based on morphological observations and phylogenetic analyses using nuclear ribosomal DNA sequences, the present fungus was recognized as a member of Gastrosporium, belonging to Gastrosporiaceae (Phallales). The genus Gastrosporium produces hypogeous to subhypogeous, small, globose, subglobose to ovoid basidiomata, and the genus includes only two known species, G. simplex and G. asiaticum. Previously, this genus has not been recorded from Japan. Japanese specimens are distinguishable from other known species of the genus by the exoperidium forming a cottony mycelial mass and they constitute a phylogenetically distinct monophyletic group. Therefore, Japanese specimens are described as a new species, G. gossypinum.

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