Lophotrichus plumbescens Morinaga, Minoura & Udagawa 1978

Egypt.

Colonies. On cellulose agar spreading broadly, thin, with vegetative mycelium submerged, leaden grey to nearly black, producing abundant ascomata mostly adjacent to the agar surface; reverse uncoloured. "Chlamydospores" sometimes observed but anamorph lacking. At 37°C, growth rate a little less than at 23°C, with reduced ascomatal production. Ascomata. Perithecial, superficial, scattered or somewhat aggregated, black, globose, 270-300 μm diam., covered on the exposed part with clusters of terminal and lateral hairs; neck usually one, occasionally two on a single ascoma, black, cylindrical, 145-225 μm long 40-50 μm wide at the base, sometimes curved, terminated with an ostiole and an ostiole fringe of numerous, colourless to pale olive brown, unbranched, remotely septate, more or less flexuous, smooth-walled hairs 80-200× 4.5-5 μm; peridium thin, dark brown, opaque, membranaceous, with outer layer consisting of dark, angular, thick walled cells 5-8 μm diam.; terminal hairs arising from the upper surface of the ascoma including the neck region surrounded the ostiole; of two kinds: (a) sparse, up to 16 or more in number, slender, straight or slightly flexuous below, flexuous above, rather rigid, septate, smooth, thick-walled, dark olivaceous brown, up to 1-1.3 mm long, 3-4 μm wide near the base, tapering gradually to a colourless or pale coloured, incurved or circinate tip; (b) numerous, mixed with type (a) hairs and similar to them but shorter, up to 500 μm long, ending in a pointed tip; lateral hairs straight, short. Asci. 8-spored, ovoid to broadly clavate, 19-26× 11-14 μm, short-stipitate, irregularly disposed, evanescent. Ascospores. Dextrinoid when young, straw-coloured, broadly ellipsoidal, 6-7.5× 5-6 μm, smooth-walled, rounded but later slightly acuminate at both ends, extruded as a reddish brown cirrhous; germ pores colourless, circular, one at each end of the spore. Paraphyses. Not observed. Notes. Lophotrichus plumbescens differs from Lophotrichus martinii C.R. Benj. and other long beaked species in arrangement and developmental mode of its terminal hairs and smaller ascospores. The formation of circinate terminal hairs is initiated at a rather early stage from the upper part of the ascoma itself rather than from the top of neck region and has been later observed near the ostiole of the neck in old cultures, while in Lophotrichus martinii most terminal hairs are limited to the top of neck throughout the course of development.

Lophotrichus plumbescens je grzib, co go ôpisoł Morinaga, Minoura & Udagawa 1978. Lophotrichus plumbescens nŏleży do zorty Lophotrichus i familije Microascaceae. Żŏdne podgatōnki niy sōm wymianowane we Catalogue of Life.