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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Scholz P. (02-05-14); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 60. Endocarpon. Verrucariaceae Zenker (1827); Verrucariales.

Taxonomic Literature: Breuss O. in: Nash T.H. et al. (eds) Lichen Flora of the Greater Sonoran Desert Region vol. 1, 181-187, Tempe (2002); Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero Special 7: 1-893 [359-361] (1985); McCarthy P.M., Lichenologist 23: 27-52 (1991); Fox B.W. in: Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and Ireland, London (1992); Harada H., Nova Hedwigia 56: 335-353 (1993); Harada H. & Wang L.-S., Lichenologist 28: 297-305 (1996); Poelt J., Bestimmungsschlüssel Europäischer Flechten: 1-757 [282-285] (1969).

Biogeography: Checklist records: Austria, Germany, Great Britain, Guianas, Italy, New Zealand, Sonoran Desert, Sweden and Norway, and United States and Canada (continental).

Ecology: Biotroph; lichenized; terricolous (and detritus), bryophytic, or rarely corticolous; substrate calciferous.

Lichen Photobionts: Primary photobiont present; chlorococcal. Primary photobiont taxonomy: Protococcus or Stichococcus (A. Beck 22-05-97); genus incertae sedis; family of unknown placement (incertae sedis), Trebouxiophyceae, Eukariota. Secondary photobiont absent.

Thallus: Crustose or foliose, not subdivided parts, squamulose, placodioid, or subfruticose, lobed. Thallus Outline: Soon disappearing. Upper Surface: Grey, brown, olive, or brownish yellow; special structures absent. Lower Surface: Attached by the whole lower surface or attached by holdfasts; special structures absent or present:; not pseudocyphellate; not cyphellate; not rhizinate or 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: Perithecioid, orbicular, forming all across the thallus surface, not emerging. Wall: Not fused. Margin: Indistinct; external filaments absent. Exciple: Black or brown. Periphyses: Present. Hymenium: Iodine reaction: Lugol’s negative or Lugol’s positive, not hemiamyloid or hemiamyloid. Interascal Hyphae: Absent. Hypothecium: Black or brown.

Ascospores: 1–2, c. 4, or c. 8 per ascus, broadly ellipsoid, ellipsoid, or oblong, 25-95 µm long, 12-32 µm wide, obtuse; septa present; transversally septate or both transversally and longitudinally; wall thin, not thickened at the septum, dark brown, hyaline, or pale brown, in Lugol's Solution negative, wall not ornamented.

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

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