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Muellerella pygmaea var. ventosicola (Mudd) Triebel

Data Set Maintenance: Data set compiled (by C. Kainz, 03-01-29).

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: variety. Muellerella. Synonyms: see Triebel D. (1989) Bibl. Lichol. 35: 1-278; Verrucariaceae Zenker (1827); Verrucariales.

Type Information: Basionym: Tichothecium pygmaeum Körb. (1853).

Taxonomic Literature: Taxonomic notes: +ascomatal wall upper part often thickened, brown to black, lower part brown or red brown;. Triebel D. (1989) Bibl. Lichol. 35: 1-278; Matzer M. (1993) Nova Hedwigia 56: 203-210; Triebel et al. (1991) Mycotaxon 42: 263-296.

Biogeography: Holarctic (worldwide in extratropical regions). Checklist records: Sonoran Desert and United States and Canada (continental) (the species is relatively common throughout Arizona and southern California).

Ecology: Biotroph; lichenicolous; endosubstratic.

Ascocarps: Perithecioid, not emerging, soon sessile, (.175)-.2-.25-(.4) mm in diam.. Periphyses: Present (periphyses, c. (1-)2-3 µm diam., up to 40 µm long).

Ascospores: 12-16 (32-64-spored) per ascus, broadly oval, 6-8.5 µm long, 4-5.5 µm wide; septa present; transversally septate; 1-transversally septate; wall thin, dark brown or pale brown, not ornamented.

Conidiomata: Present; pycnidial (c. 45-90(-100) µm diam., immersed).

Conidia: (2.5)-3-5-(5.5) µm long; (.5)-1-1.5-(2) µm wide.

(report generated 04.Okt.2007)

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