Letrouítia ( letruction ) is a genus of lichenized Ascomycetes fungi belonging to the Teloschistales order, within which it is allocated to the monotypic Letrouitiaceae family.
| Letrouitia | |||||||||||||||||||||
| Scientific classification | |||||||||||||||||||||
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| International scientific name | |||||||||||||||||||||
Letrouitia Hafellner & Bellem., 1982 | |||||||||||||||||||||
| Type view | |||||||||||||||||||||
Letrouitia domingensis ( Pers. ) Hafellner & Bellem. | |||||||||||||||||||||
Description
The thallus is scale-rich, superficial, widely growing, thin, smooth or warty, light yellow, olive-gray, greenish-yellow, orange-yellow, contains anthraquinones , which color the thallus in violet upon contact with 10% KOH (K +). Some species form soredia and isidia .
Fruit bodies - biatorial apothecia type, sessile, rounded, flat, slightly concave or slightly convex, the apothecia disc is painted in yellow-orange, dark-orange, red-brown, violet-brown, blackish tones. The laminar margin is usually absent; excipients are usually developed, usually paler than the disk, from thick-walled radially oriented hyphae. Apothecia hyphae are often inlaid with anthraquinone crystals. Epigymenium yellow-orange to orange-brown. Hymenium unpainted, 60-150 microns thick. Hypothecia unpainted, yellowish or brownish, 25-65 microns thick.
Askeys are broad-club-shaped, with a thick diffuse outer layer connected with an additional shell in the upper part of the asuk covering the apical apparatus. This layer is clearly amyloid (J +), which makes the tip of the asuka in the solution of iodine in potassium iodide dark blue.
Paraphyses are thin, septate, rarely branching, 1.5-2 microns wide, sometimes slightly thickened at the apex.
Disputes of 1-8 in asuka, hyaline, narrowly elliptic to elliptic, transversely septate, sometimes also with longitudinal septa, 20-60 × 8-22 microns.
Conidiomas - pycnids , are not formed in all species. Conidiogenic cells are terminal and intercalary. Conidia are rod-shaped, about 3 × 1 μm.
Ecology and range
A genus with a predominantly tropical range, some species are found in temperate regions.
Epixyl lichens found on tree bark, rarely on bare wood.
Nomenclature
The genus was identified in 1982 by the Austrian lichenologist Josef Hafellner and the French lichenologist Andre Belmer in the publication Nova Hedwigia .
The name of the genus was given by the name of the French scientist-lichenologist Maria-Agnes Letruy-Galin (born 1931).
Views
- Letrouitia aureola ( Tuck. ) Hafellner & Bellem.
- Letrouitia bifera ( Nyl. ) Hafellner
- Letrouitia corallina ( Müll.Arg. ) Hafellner
- Letrouitia coralloidea (Müll.Arg.) Hafellner
- Letrouitia domingensis ( Pers. ) Hafellner & Bellem.
- Letrouitia flavocrocea (Nyl.) Hafellner & Bellem.
- Letrouitia hafellneri SYKondr. & Elix
- Letrouitia leprolyta (Nyl.) Hafellner
- Letrouitia leprolytoides SYKondr. & Elix
- Letrouitia muralis Hafellner
- Letrouitia parabola (Nyl.) R. Sant. & Hafellner
- Letrouitia sayeri (Müll.Arg.) Elix
- Letrouitia transgressa ( Malme ) Hafellner & Bellem.
- Letrouitia vulpina (Tuck.) Hafellner & Bellem.
Notes
Literature
- Elix JA Letrouitia // Flora of Australia. - 2009. - Vol. 57.