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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Printzen C. (98-05-27); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 12. Mycobilimbia. Mycobilimbiaceae Hafellner (1984); Cladoniineae; Lecanorales.

Type Information: Type: Mycobilimbia fusca (A. Massal.) Hafellner & V. Wirth (=
Mycobilimbia tetramera (De Not.) Clauzade, Diederich & Roux
(1989) nom. inval.).

Taxonomic Literature: Taxonomic notes: Data refer to M. carneoalbida, M. epixanthiodes, M. sphaeroides, M.
tetramera; not included is the Bacidia sabuletorum group incl. L.
hypnorum and L. berengeriana; hymenial gel not amyloid in young
apothecia, but looking as amyloid when asci are abundant. Coppins B.J. in: Purvis O.W. et al. (eds), The Lichen Flora of Great
Britain and Ireland, London (1992) - sub Biatora; Hafellner J. in:
Hertel H. & Oberwinkler F. (eds), Beih. Nova Hedwigia 79: 241-371
[308-310] (1984); Hafellner J., Herzogia 8: 53-59 (1989); Printzen
C., Biblioth. Lichenol. 60: 1-275 [§§§] (1995);
Rambold G. & Triebel D., Biblioth. Lichenol. 48: 1-201 [142]
(1992).

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

Ecology: Biotroph; lichenized or lichenicolous; terricolous, bryophytic, lignicolous, or corticolous.

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

Thallus: Crustose, squamulose, granular, rimose, or areolate (primarily areolate). Upper Surface: Grey, green, brown, olive, or brownish yellow; special structures absent or present:; not pseudocyphellate; eciliate; without hairs; not isidate; not sorediate or sorediate; not cephalodiate; not lobulate; without granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by the whole lower surface; special structures absent.

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: Apothecioid, orbicular, forming all across the thallus surface, soon sessile. Margin: Indistinct to distinct; external filaments absent. Exciple: Brown or brownish yellow. Periphyses: Absent. Epithecium: Apical cells brown or brownish yellow. Hymenium: Iodine reaction: Lugol’s negative or Lugol’s positive, not hemiamyloid or hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: Brown or brownish yellow.

Asci: Tholus thickened, amyloid, with non-amyloid narrow axial body and amyloid convergent flanks towards apex or with amyloid tube; ocular chamber indistinct or broad; dehiscence lecanoralean; exoascus euamyloid, hemiamyloid.

Ascospores: c. 8 per ascus, ellipsoid, fusiform, or oblong, 9.5-26 µm long, 3.5-7 µm wide, obtuse; septa present; transversally septate, 1-3-transversally septate, formed by the proper spore wall; wall thin, not thickened at the septum, hyaline, in Lugol's Solution negative, wall not ornamented.

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