Pseudopyrenula Müll. Arg. (1883)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Aptroot A. (95-02-10; 00-03-29), Triebel D. (00-03-29), and Scholz P. (02-05-16); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: genus. Number of known taxa within this rank: 6 (A. Aptroot 99-09-27). Pseudopyrenula. Trypetheliaceae Zenker (1927); Pyrenulales.

Type Information: Type: Pseudopyrenula diluta (Fée) Müll. Arg.

Taxonomic Literature: Taxonomic notes: Aptroot (00-03-31): The ascospores of P. staphyleae are 45-55 x 12 -

17 µm (without gelatinous pointed sheath). This is refered to

in character 462 and 463 as "max". Aptroot A., Nova Hedwigia 66: 89-162 [135, 156] (1998); Aptroot A.
in: Nash T.H. III et al. (eds) Lichen Flora of the Greater Sonoran
Desert Region vol. 1, 417, Tempe (2002); Aptroot A., Diederich P.,
Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-
220 [148-150] (1997); Harris R.C., A taxonomic revision of the genus
Arthopyrenia A. Massal. s. lat. (Ascomycetes) in North America. - Ph.
D. diss., Michigan State Univ., East Lansing (1975); Harris R.C.,
More Florida lichens including the 10c tour of the pyrenolichens: 1-
192 [119], Bronx NY (1995); Harris R.C. in Glenn et al. (eds):
Lichenographia Thomsoniana: 133-148. - Mycotaxon Ltd., Ithaca, NY
(1998); Müller J., Flora 66: 241-249 (1883); Poelt
J.,
Bestimmungsschlüssel Europäischer Flechten: 1-757 [545]
(1969).

Biogeography: Checklist records: Guianas, New Guinea, Sonoran Desert, Thailand, United States and Canada (continental), and Republic of South Africa.

Ecology: Saprobic or biotroph; lichenized; lignicolous or corticolous; substrate non-calciferous (sandstone).

Lichen Photobionts: Primary photobiont absent or present; trentepohlioid. Primary photobiont taxonomy: Trentepohliales. Secondary photobiont absent.

Thallus: Indistinct or crustose, not subdivided parts. Upper Surface: Grey, white, or grey-yellow; special structures absent. Lower Surface: Special structures absent.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Perithecioid, orbicular, forming all across the thallus surface, not emerging, becoming adnate to soon sessile, stromatic. Wall: Not carbonized, carbonized only in parts, or with a carbonized black clypeus around the ostiole, not fused or fused. Margin: External filaments absent. Exciple: Black or brown. Periphyses: Absent. Hymenium: Oil inspersed. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: Black, white, olive, or brownish yellow.

Asci: Tholus thickened (with poorly defined more or less refractive ring), not amyloid; ocular chamber broad; dehiscence bitunicate.

Ascospores: c. 8 per ascus, ellipsoid, oblong-obtuse, oblong, or fusiform, 18-45-(55) µm long, 5.5-13-(17) µm wide, obtuse; septa present; transversally septate, 3-transversally septate, formed by the proper spore wall or endospore wall layer; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; immersed, formed all accross the thallus surface.

Conidiogeneous Cells: Apical. Conidia: Filiform or bacilliform; microconidial, not branched; aseptate; cell wall hyaline.

Secondary Metabolites: Not detected or present, of the following substance class(es): (anthra-)quinones and xanthones (lichexanthone).

(report generated 04.Okt.2007)