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Data Set Maintenance: Data set standard item. Data set author(s): Hertel H. (99-01-01). Data set not revised.

Nomenclature: Current taxonomic status: basionymous or accepted. Taxonomic rank: species. Lecidea. Synonyms:-; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Hertel H., Herzogia 1: 426-427 (1970); type specimen label data: Switzerland, Graubünden: Silvretta, Hänge oberhalb des Riezenjoches, über der Heidelberger Hütte, Val Fenga, 2400 m, 7 August 1967, J. Poelt & M. Steiner (GZU, holotype).

Taxonomic Literature: Taxonomic notes: In contrast to the youth-parasit Lecidea leprosolimbata, L. rapax remain a lichenicolous lichens throughout its whole life circle. Türk R., Wittmann H., Sauteria 3: 229 (1987 - distrib. map for Salzburg, Austria); Türk R., Poelt J., Österr. Akad. Wiss., Biosystematics and Ecology Ser. 3: 64 (1993 - bibliography of Austrian lichens); Hertel H., Biblioth. Lichenol. 58: 169 (1995).

Ecology: Biotroph (matrix: Bellemerea alpina, B. cinereorufescens); lichenicolous (matrix: Bellemerea alpina, B. cinereorufescens); episubstratic. Host or Phorophyte Taxonomy: Bellemerea.

Thallus: Areolate (primarily areolate), continuous throughout; lobes angular or rounded at the front; separate thallus parts.3-.6 mm thick. Thallus Size and Differentiation: Large or normally small; main branches basally not constricted or basally constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: Brown (beige to light brown), plane or convex; not sorediate; without thalloconidia thalloconidia.

Upper Cortex: Epicortex present. Medulla: Iodine reaction rarely in Lugol's solution negative or normally in Lugol's solution positive.

Ascocarps: Soon sessile, rarely not constricted or slightly constricted at the base, 30-110 per cm², .7-1-(1.7) mm in diam.. Margin: Not flexuose, persistent or excluded, 40-70 µm wide, epruinose. Disk: Plane, weakly convex, or strongly convex, black, epruinose, pruina rarely scarce, without an umbo. Exciple: Hyphae radiating outwards; 3-4 µm wide; grey; inspersed with crystals. Epithecium: Apical cells olive to turquoise, cell pigment HCl+ blue. Hymenium: 45-60 µm high; white; iodine reaction: Lugol’s positive. Subhymenium: 20-55 µm high; white. Hypothecium: Brown.

Ascospores: Ellipsoid to oblong, (6.5)-8.2-9.1-(10) µm long, (3.2)-3.9-4.4-(5) µm wide; wall not ornamented.

Secondary Metabolites: Present, norstictic acid (major) to stictic acid (minor).

Spot Tests: Medulla: K + red (medulla), C –, PD + deep yellow (medulla); ascocarp margin (in section): K – to + red, C – disk: C – hypothecium: K – epihymenium: K – to + green.

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