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Data Set Maintenance: Data set standard item. Data set author(s): Rambold G. Data set reviewer(s): Schultz M. (00-03-02) and Scholz P. (02-05-17); revised; to be published after submission.

Nomenclature: Current taxonomic status: accepted or basionymous. Taxonomic rank: genus. Number of known taxa within this rank: 5. Synalissa. Lichinaceae Nyl. (1854); Lichinales.

Type Information: Type: Synalissa symphorea (Ach.) Nyl. (= Synalissa ramulosa auct.).

Taxonomic Literature: Clauzade G. & Roux C., Bull. Soc. Bot. Centre-Ouest N.S. - Numero

Special 7: 1-893 [731] (1985); Gilbert O.L. & Coppins B.J. in:

Purvis O.W. et al. (eds), The Lichen Flora of Great Britain and

Ireland, London (1992); Schultz M. in: Nash T.H. III et al. (eds)
Lichen Flora of the Greater Sonoran Desert Region vol. 1, 476-477,
Tempe (2002).

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

Lichen Photobionts: Primary photobiont present; cyanobacterial. Primary photobiont taxonomy: Gloeocapsa (A. Beck 19-05-97); Microcystaceae; Chroococcales, Cyanobacteria, Prokaryota. Secondary photobiont absent.

Thallus: Foliose, crustose, or fruticose, not subdivided parts, subfruticose or granular, umbilicate. Thallus Outline: Soon disappearing. Upper Surface: Black, grey (rarely pruinose), or brown; special structures absent or present:; not pseudocyphellate; eciliate; not isidate or isidiate; not sorediate; not cephalodiate; not lobulate; without granules or with granules granules, without thalloconidia thalloconidia. Lower Surface: Attached by holdfasts; 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 directly at the tip of the thallus parts, soon sessile to stipitate. Wall: Not carbonized, not fused. Margin: Distinct to prominent; external filaments absent. Exciple: White. Periphyses: Absent. Epithecium: Apical cells hyaline or brownish yellow. Hymenium: Iodine reaction: Lugol’s negative, hemiamyloid. Interascal Hyphae: Present, scarcely branched, not or scarcely anastomosed. Hypothecium: White or brownish yellow.

Asci: Tholus not thickened, not amyloid; ocular chamber indistinct; dehiscence prototunicate; exoascus not amyloid, not hemiamyloid.

Ascospores: c. 8 to 16-32 per ascus, globose or broadly ellipsoid, 7-12 µm long, 6-9 µm wide, obtuse; septa absent; 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, formed all accross the thallus surface or along the thallus periphery.

Conidiogeneous Cells: Apical. Conidia: Ellipsoid or bacilliform; microconidial, not branched; aseptate; cell wall hyaline.

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