Apioporthella vepris (All Fungi)

General description: 

Stromata variable, often appearing as longitudinally elongate pustules, sometimes erumpent merely as circular blackened discs 0.1-0.2 mm diam., with the ectostromatic disc a cushion of brownish cells containing one or a few fused ostioles. Ascomata 160-300 x 160-200 µm, in definite clusters but also sometimes in small thickly scattered groups. Peridium composed externally of 2 to 3 layers of brown, polygonal thick-walled cells, internally
of 1 to 2 layers of hyaline, compressed, thin-walled cells; peridium of the neck is composed of brown, parallel elongated cells.
Interascal tissue absent, at least at maturity. Asci 30-40 x 6-8 µm, clavate, sessile, the base evanescent, with an inconspicuous apical ring, 8-spored. Ascospores 6-9(10) x 2-2.5 µm, often constricted at the septum and often with a short bristle-like mucous appendage to ca 5 µm in length at each end (visible in water mounts), large cell usually 2-guttulate, small cell usually 1-guttulate.

Anamorph Phomopsis-like. Conidiomata stromatic, probably preceding development of ascomata. Conidia (alpha-conidia) 5-7 x 1-1.5 µm, ellipsoidal to fusiform-cylindrical, hyaline, simple.

Conservation status: 

No formal assessment has been made, but there is a substantial number of collections from GBI and bearing in mind the plentiful supply of substratum the species is probably not at risk.

Phylogeny: 

The placement of this species has been varied over the years, and preliminary phylogenetic analysis (de Silva et al. 2009) indicates that it has no close relatives

Associations: 

On dead stems (and rarely dead leaves) of Rubus species, perhaps initially endophytic in nature

Distribution: 

Scattered throughout GBI. Also reported from Europe (Austria, Finland, France, Germany, Italy, Poland, Spain and Sweden), North America (Canada and United States), and Asia (Taiwan).

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Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith