to LIAS


Botanische Staatssammlung München © 1995–2008
Data remain intellectual property of the data set authors.



Polymeridium (Müll. Arg.) R. C. Harris (1980)

Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Aptroot A. (95-02-10); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: genus. Number of known taxa within this rank: 19. Polymeridium. Trypetheliaceae Zenker (1927); Pyrenulales.

Type Information: Type: Polymeridium contendens (Nyl.) R.C. Harris.

Taxonomic Literature: Aptroot A., Diederich P., Sérusiaux E. & Sipman H.J.M., Biblioth. Lichenol. 64: 1-220 [142-143] (1997); Harris R.C., Boletim do Museu Paraense "Emilio Goeldi", série Botánica 7(2): 619-644 (1991); Harris R.C., Bot. Mus. Para. Emílio Goeldi, sér. Bot. 7: 619-699 (1993); Tucker S.C. & Harris R.C., Bryologist 82: 1-20 (1980);.

Biogeography: Checklist records: United States and Canada (continental), Guianas, Thailand, and New Guinea.

Ecology: Biotroph; lichenized; corticolous.

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

Thallus: Indistinct.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Orbicular, not emerging. Wall: Not fused. Margin: Indistinct; external filaments absent. Exciple: Black. Periphyses: Absent. Interascal Hyphae: Present?, distinctly branched, distinctly anastomosed. Hypothecium: Black.

Asci: Tholus thickened, not amyloid; ocular chamber broad; dehiscence bitunicate.

Ascospores: c. 4 or c. 8 per ascus, ellipsoid, 13-55 µm long, 4-20 µm wide, obtuse or aciculate; septa present; transversally septate or both transversally and longitudinally, 1-15-transversally septate, formed by the endospore wall layer; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

Conidiomata: Absent resp. not observed or present; pycnidial; immersed.

Conidia: Bacilliform.

Secondary Metabolites: Not detected or present, of the following substance class(es): xanthones.

(report generated 04.Okt.2007)


In case that additional characters and states are required to be included in this data set, consult the LIAS Instructions to Participants and follow the procedures described there.

LIAS Home