Pyrenomycetes Species Page

Bertia multiseptata

Large clustered ascomata
(Sivan.) Huhndorf, A.N. Mill. & F.A. Fern., Mycol. Res. 108: 1387. (2004)
Bertia moriformis var. multiseptata Sivan.
Figure from 1153/3127 mix
Complete Description
Ascomata turbinate, with a thick sterile base, collapsing collabent when dry, dark brown to black, 475-600 µm diam, 400-500 µm high, superficial, with a roughened, tuberculate surface, occurring in small to large clusters. Ascomatal wall of textura globosa in surface view; in longitudinal section a single layer, composed of pale brown, pseudoparenchymatic cells, with smaller cells at the outer surface, cells at base radiate from the bottom; Munk pores present, numerous per cell. Ascomatal apex flattened becoming collabent, with an external ostiole indistinct but visible in longitudinal section, periphyses absent. Centrum with a apical cushion of hyaline, thin-walled cells, quellkorper absent, paraphyses hyaline, inflated, unbranched. Asci cylindrical-clavate, long-stipitate, spore bearing part 80-100 x 15-20 µm, pedicels 40-60 µm, with an indistinct apical ring, with 8 biseriate ascospores. Ascospores long fusiform, hyaline to brown, 3-5 (-7) septate, 50-70 x 5-7 µm, without sheath or appendages.
Found on decaying wood and bark. Our collections are from Puerto Rico and Panama. The type is from the UK and the species is known predominently from temperate areas.
Similar Taxa Comments
This species differs from B. moriformis in having longer, multiseptate ascospores that become brown. In certain specimens, the ascospores can remain hyaline for a long time, but their longer size still distinguishes it from B. moriformis. The ascomata are strongly warted and the apex is flattened, somewhat vertically collapsed, but not as collabent as in B. tropicalis. The ascospore and ascus sizes are larger than those given for temperate collections in the literature.