Pyrenomycetes Species Page

Biciliosporina kawarensis

Large clustered ascomata
amerospore
Subram. & Sekar, Kavaka 18(1-2): 39 (1993) [1990]

Hypocreomycetidae
Coronophorales
Figure from EN1549 (Costa Rica)
Complete Description
Ascomata subglobose to lenticular, collapsing collabent when dry, dark brown to black, 550-700 µm diam., 400-450 µm high, erumpent becoming superficial, with a smooth surface,separate to somewhat clustered in small groups, with sparse brown, subicular hyphae. Ascomatal wall of textura globosa in surface view, composed of pale brown, pseudoparenchymatic cells; Munk pores present, few per cell. Ascomatal apex collabent, without an ostiole; apices of the empty ascomata have a large, ragged-edged opening after release of the ascospores. Centrum with a massive, elongate quellkorper 400 x 120 µm, paraphyses absent. Asci clavate, long stipitate, spore bearing part 17-23 x 7-14 µm, pedicels 25-55 µm, without a distinct apical ring, with eight biseriately to triseriately arranged ascospores. Ascospores hyaline, one celled, strongly twisted and spirally curved, reniform, with apiculate ends as elongate extensions of the wall, 9-12 x 4.5-6.5 µm (excluding extensions), extensions straight or variously curved, 7-10 µm long.
Occurrence
Found on decaying wood or bark. Our collection is from Costa Rica. The type was described from India. This species is not common, known only from these two collections.
Similar Taxa Comments
Four genera in the Coronophorales have ascospores that have wall extensions (described as appendages in the literature): Biciliospora, Biciliosporina, Janannfeldtia and Scortechiniella. In Biciliosporina and Janannfeldtia the ascomata are immersed, later becoming erumpent, without an extensive subiculum. In Biciliospora and Scortechiniella the ascomata are superficial, surrounded by an extensive subiculum. The asci are eight-spored in Biciliospora and Biciliosporina and multispored in the other two genera. This species fits the description of Biciliosporina kawarensis, differing only in the slightly larger ascospores.