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Data Set Maintenance: Data set standard item. Data set author(s): Triebel D. Data set reviewer(s): Scholz P. (06-06-12, 06-08-07, 07-07-27) and Triebel D. (01-08-12; 02-06-22; 03-01-29); not revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 37. Endococcus. Verrucariaceae Zenker (1827); Verrucariales.

Taxonomic Literature: Alstrup V., Graphis Scripta 8: 25-29 [27] (1997); Alstrup V., Christensen S.N., Hansen E.S. & Svane S., Fradskaparrit 40: 61-121 [90-91] (1994); David J.C. & Etayo J., Lichenologist 27: 314-316 (1995); Etayo J., Biblioth. Lichenol. 84:1-154 [42-46] (2002); Etayo J. & Breuss O., Österr. Z. Pilzk. 10: 315-317 (2001); Hafellner J., Herzogia 10: 1-28 [8-10] (1994); Hafellner J., Triebel D., Ryan B.D. & Nash T.H., Mycotaxon 84: 293-329 (2002); Halici M.G., Kocourková J., Diederich P. & Aksoy A., Mycotaxon 100: 337-342 (2007); Kocourková J., Acta Mus. Nat. Pragae, Ser. B., Hist. Nat. 55 (3-4): 59-169 [81-86] (2000); Matzer M., Cryptog. Mycol. 14: 11-19 (1993); Renobales G., Guineana 2: 1-310 [105-106] (1996); Serusiaux E., Diederich P., Brand A. M. & van den Boom P., Lejeunia 162: 1-95 [24-29] (1999); Triebel D., Biblioth. Lichenol. 35: 1-278 [90-105] (1989); Triebel D., Sendtnera 1: 273-280 (1993).

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

Ecology: Biotroph; lichenicolous; terricolous or bryophytic; substrate non-calciferous or calciferous.

Medulla: Iodine reaction in Lugol's solution negative; not different with or without KOH pre-treatment (euamyloid).

Reproduction Strategy: Only known as sterile, asexually reproducing form or with sexual (and possible asexual) stages. Ascocarps: Perithecioid, orbicular, not emerging, becoming adnate to soon sessile. Margin: External filaments absent. Exciple: Black, olive, or brown. Periphyses: Present. Hymenium: Iodine reaction: Lugol’s negative, hemiamyloid. Interascal Hyphae: Absent. Hypothecium: Black, brownish yellow, or brown.

Ascospores: c. 4 to c. 8 per ascus, ellipsoid, broadly ellipsoid, ovoid, fusiform, or slightly curved, 7.5-21 µm long, 3.5-9 µm wide, obtuse or aciculate; septa absent or present; transversally septate, 1-1-transversally septate, formed by the proper spore wall; wall thin or thick, distinctly differentiated into primary and secondary wall, not thickened at the septum, not constricted where the septum meets the spore wall or laterally constricted where the septum meets the spore wall, pale brown, middle brown, or dark brown, in Lugol's Solution negative, wall not ornamented or ornamented.

Conidiogeneous Cells: Apical. Conidia: Bacilliform; microconidial; aseptate; up to 0-septate; cell wall hyaline.

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