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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Lücking R. (95-08-01); revised; to be published after submission.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: genus. Number of known taxa within this rank: 8. Tapellaria. Ectolechiaceae (Vain.) Zahlbr. (1905); family of unknown placement (incertae sedis); Lecanorales.

Taxonomic Literature: Galloway D.J., Flora of New Zealand Lichens: i-lxxiii, 1-662 [564-565], Wellington (1985); Lücking R., Lichenologist 31(3): 269-289 (1999); Santesson R., Symb. Bot. Upsal. 12: 1-590 [494-509] (1952).

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

Lichen Photobionts: Primary photobiont present; chlorococcal. Secondary photobiont absent.

Thallus: Crustose, not subdivided parts, areolate (primarily areolate). Thallus Outline: Soon disappearing or persistent. Upper Surface: Grey or white; special structures absent. Lower Surface: Attached by the whole lower surface; special structures absent or present:; not pseudocyphellate; not cyphellate; not rhizinate; without thalloconidia thalloconidia; not cavernulate; not tomentose.

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Apothecioid, orbicular, forming all across the thallus surface, soon sessile. Margin: Indistinct; external filaments absent. Exciple: Brown or white. Periphyses: Absent. Epithecium: Apical cells black or brown. Interascal Hyphae: Present, distinctly branched, distinctly anastomosed. Hypothecium: Brown.

Asci: Tholus thickened, amyloid, entirely amyloid throughout; dehiscence lecanoralean.

Ascospores: 1–2 to c. 8 per ascus, ellipsoid or oblong, 14-110 µm long, 3.5-24 µm wide, obtuse; septa present; transversally septate or both transversally and longitudinally, 3-20-transversally septate; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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

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