Lecidea tessellata Flörke

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: Cladopycnidium sinense H.Magn., Lecidea andina Räsänen, Lecidea azurea Kremp., Lecidea caretteana Räsänen, L. casimiri Müll.Arg., Lecidea columbiana H.Magn., Lecidea homalodes Nyl., Lecidea magna Lynge, L. occidentalis Lynge, Lecidea pavimentans H.Magn., Lecidea percrassata H.Magn., L. persica J.Steiner; Lecideaceae Chevall. (1826); Lecanorales.

Type Information: Protologue: Flörke H.G., Deutsche Lichenen, no. 64 (1819); type specimen label data: Germany, Harz Mts.: auf Sandsteinfelsen zwischen Halberstadt und Blankenburg, sowie zwischen Blankenburg und Quedlinburg, G.H. Flörke; Flörke: Deutsche Lich. no. 64 (M, lectotype).

Taxonomic Literature: Taxonomic notes: In humide alpine situations on (slightly) calcareous rocks populations characterized by a pale bluish-grey thallus occur, which may be named "var. caesia (Anzi) Arnold". This calcicolous, alpine variety is not alway clearly separated from var. tessellata. Fries T.M., Lichenogr. Scand. 490-490 sub Lecidea cyanea (1874); Vainio E.A., Acta Soc. Fauna Fl. Fenn. 57(2): 117-119 (1934); Anderson R.A., The Lichen Genus Lecidea in Rocky Mountain National Park, 41-43 (Diss. Univ. Colorado, Boulder; 1964); Hertel H., Beih. Nova Hedwigia 24: 45-49 (1967); Hertel H., Herzogia 1: 429-430 (1970); Hertel H., Herzogia 2: 50-51 (1970); Hertel H., Willdenowia 6: 245-246 (1971); Hertel H., Herzogia 2: 249 (1971); Nowak J., Tobolewski Z., Porosty Polskie (Warszawa & Kraków) 548 (1975); Hertel H., Khumbu Himal 6: 282-288 (1977); Buschardt A., Biblioth. Lichenol. 10: 200-206 (1979); Inoue M., J. Sci. Hiroshima Univ., Ser. B, Div. 2 (Bot.), 18(1): 48-49 (1982); Clauzade G., Roux C., Bull. Soc. Bot. Centre-Ouest, nouv. ser., num. spec. 7: 461 (1985); Hladun N., Inst. d'estudis Catalans, Arx. Secc. Ciènces 80: 101- (1985); Wittmann H., Türk R., Kärntner Nationalpark-Schriften 4: 80 (Klagenfurt 1990) [Color-photograph showing also the typical graphidoid pycnidia.]; Hertel H., Mitt. Bot. München 30: 313-314 (1991); Andreev M.P., Kudratov I., Botan. Zhurn. 77: 107 (1992); Türk R., Poelt J., Österr. Akad. Wiss., Biosystematics and Ecology Ser. 3: 65 (1993 - bibliography of Austrian lichens); Hertel H., Biblioth. Lichenol. 58: 174-175 (1995); Wirth V., Flechtenflora, 2.Aufl., 391 (1995); Wirth V., Flechten Baden-Württembergs, Teil 1, 516 (1995).

Biogeography: Colline, montane, and alpine. Continent: Europe (Au, Fe, Ga, Ge, Gr, He, Hs, Is, It, Ju, No, Sb, Su), Northern America (Greenland, Canada, USA), Southern America (Venezuela, Argentina), Asia-Temperate (Turkey, Iran, Kazachstan, Tadshikistan, Afghanistan, Nepal, Mongolia, China), and Africa (Mt. Kenya).

Ecology: Biotroph (occasionally a youth-parasit; matrix: Aspicilia sp., esp. A. cinerea); lichenized or lichenicolous (occasionally a youth-parasit; matrix: Aspicilia sp., esp. A. cinerea); episubstratic; substrate non-calciferous or calciferous. Host or Phorophyte Taxonomy: Aspicilia.

Thallus: Areolate (primarily areolate), continuous throughout or dispersed along the periphery, continuous in the centre; lobes angular at the front; separate thallus parts.3-5 mm thick. Thallus Size and Differentiation: Large; main branches basally not constricted. Thallus Outline: Margin concolorous the thallus centre. Upper Surface: Rarely white or grey (pale grey or pale blue-grey or beige-grey), plane or convex; not sorediate; without thalloconidia thalloconidia.

Medulla: Iodine reaction in Lugol's solution positive (rarely weak).

Ascocarps: Forming on the pro- or hypothallus, soon sessile, not constricted or slightly constricted at the base, 15-110 per cm², .7-1.6-(7) mm in diam.. Margin: Not flexuose or slightly flexuose, persistent or excluded, 30-80 µm wide, epruinose. Disk: Plane or weakly convex, black, epruinose, pruina scarce, without an umbo. Exciple: Hyphae radiating outwards; 3-4.5 µm wide; grey; inspersed with crystals. Epithecium: Apical cells olive, green, or brown, cell pigment reacting with 10% HCl (in H2O). Hymenium: 45-(mean: 53)-70 µm high; white or rarely pale green; iodine reaction: Lugol’s positive. Subhymenium: 40-(discernible in lactic blue only)-60 µm high; white. Hypothecium: White or brownish yellow.

Ascospores: Broadly ellipsoid, ellipsoid, or oblong, (5)-6.2-12-(16.5) µm long, (3)-3.6-6-(7.5) µm wide; wall thick, distinctly differentiated into primary and secondary wall, not ornamented.

Conidia: (7)-8.6-13-(17) µm long.

Secondary Metabolites: Present, confluentic acid, 2'-O-methylmicrophyllinic acid (traces), 2'-O-methylperlatolic acid (minor), or norstictic acid (minor).

Spot Tests: Medulla: K –, C –, PD – ascocarp margin (in section): K –, C – disk: C – hypothecium: K – epihymenium: K –.

(report generated 04.Okt.2007)