Pyrenomycetes Species Page

Lentomitella tropica

Large clustered ascomata
Large separate ascomata
amerospore
Huhndorf, M. Greif, Mugambi & A. N. Mill., Mycologia 100: 948 (2008)

Sordariomycetidae
Incertae sedis
Figure from SMH1797
Complete Description
Ascomata obpyriform to lageniform, short to long beaked, not collapsing when dried, surface glabrous, dark brown, 375-475 µm diam, 700-900 µm high, numerous, gregarious, superficial, at the base connected by sparse subicular hyphae to the substrate. Ascomal wall of textura angularis-globosa in surface view, in longitudinal section 40-50 µm thick, composed of large, pale brown, polygonal to globose, pseudoparenchymatic cells, outer layer a very thin, darker brown crust. Ascomatal apex conical to elongate beak-like, often with several deep sulcations, 150-200 µm wide, ostiole circular, with periphyses. Paraphyses 6-7 µm wide, abundant, persistant, with gelatinous coating. Asci cylindrical, short stipitate, 90-100 x 9-11 µm, unitunicate, apex rounded, with large, refractive ring, 2-3.5 µm high, 3.5-4.5 µm wide, with 8, uniseriate ascospores. Ascospores ellipsoid, straight to slightly curved, pale brown, smooth, one-celled, 14.5-16 x 5-6 µm.
Similar Taxa Comments
This has a ring like Torrentispora Hyde et al but ascomata more like Lentomitella (clustered not solitary); this species has hairs only at the base (L. pallibrunnea has tomentum covering venter), fb lageniform not a globose venter with a long beak as in L. pallibrunnea; in many collections the fb collapse vertically and horizontally (not seen in L. pallibrunnea); Both species have distinctive large ring that looks like the one in Torrentispora Hyde (Reblova’s species of Xylomelasma have smaller rings).