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Chaenothecopsis caespitosa
Nomenclature
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Family: MycocaliciaceaeGenus: Chaenothecopsis
SUMMARY
Anamorph: not known.
Teleomorph: ascomata 0.8-1.5 (-2.5) mm tall, grouped in extensive clusters. Stipe matt black, straight, 150-250 μm diam. at the base, tapering to 80-100 µm diam. near the fertile head, sometimes slightly flexuous or curved, sometimes branched near the base or proliferating from the capitulum; composed of an inner core of thin-walled hyaline intertwined hyphae, and outer layer of much thicker-walled hyphae, covered with a layer of pigmented material that dissolves in KOH. Fertile head 300-450 µm diam., ± globose, black, strongly white-pruinose. Excipular hyphae brownish to slightly green, periclinally arranged. Epithecium olivaceous, usually with crystals. Hymenium light brown to greenish. Interascal tissue of persistent thin-walled filiform paraphyses, 1.5–2 μm diam., sometimes branched, as long or slightly longer than the asci. Asci 70-85 x 5-6 µm, cylindrical with a tapering stipe, fairly thick-walled but not fissitunicate, the apex variously thickened, often penetrated by a short canal but without a distinct apical ring, 8-spored. Ascospores uniseriately arranged, 9-11.5 x 3.5-4 µm, cylindrical to cylindric-ellipsoidal, not constricted at the ± median septum, olivaceous brown, smooth, covered in an amorphous coat that dissolves when the spore is fully mature.