Wednesday, February 10, 2021

[Fungi • 2020] Bryostroma popei • A New Bryophilous Ascomycete (Ascomycota: Dothideomycetes) from the British Isles, with A Worldwide Key to the Genus Bryostroma

Bryostroma popei Greiff & P.F.Cannon.

in Greiff & Cannon, 2020. 

The bryophilous Bryostroma popei is a novel ascomycete that infects the pleurocarpous moss Leptodictyum riparium. The morphology of the new species is described, illustrated and compared to other species in the genus. A key to the nine species of Bryostroma is provided.

Key Words: intracellular hyphae, muscicolous, parasitism

Bryostroma popei Greiff & P.F.Cannon.
A ascomata on decaying stem of Leptodictyum riparium; B section through ascoma, showing the oblique basal stromatic peg (arrow); C asci, ascospores and degenerating interascal tissue, mounted in water; D ascus and ascospores mounted in warmed lactic acid, showing the spore ornamentation.

Bryostroma popei Greiff & P.F.Cannon, sp. nov. 
(Dothideomycetes, incertae sedis). 
Type: UK, Isle of Wight, Havenstreet, Briddlesford Copse, on decaying stems of Leptodictyon riparium, UK grid reference SZ556900, 26 Sept. 2019, G. R. L. Greiff. 
Holotype (K(M) 255204). [Index Fungorum IF557422].

HABITAT. Riparian ancient woodland; alt. approx. 15 m. The host plant Leptodictyum riparium (Hedw.) Warnst. (Amblystegiaceae, Hypnales, Bryidae, Bryophyta) was growing in a seasonal stream.

ETYMOLOGY. popei, in honour of the Isle of Wight botanist, mycologist and excellent all-round naturalist Dr Colin R. Pope.

George R. L. Greiff and Paul F. Cannon. 2020. Bryostroma popei — A New Bryophilous Ascomycete from the British Isles, with A Worldwide Key to the Genus Bryostroma. Kew Bulletin. 75: 60. DOI: 10.1007/s12225-020-09917-0