to LIAS


Botanische Staatssammlung München © 1995–2008
Data remain intellectual property of the data set authors.



Immersaria athroocarpa (Ach.) Rambold & Pietschm.

Data Set Maintenance: Data set standard item. Data set author(s): Hertel H. (C. Kainz, 03-06-03). Data set not revised.

Nomenclature: Current taxonomic status: accepted. Taxonomic rank: species. Immersaria. Synonyms: Lecidea athroocarpa (Ach.) Ach., Lecidea fuscoatra var. athroocarpa, Porpidia athroocarpa (Ach.) Hertel & Rambold, Amygdalaria athroocarpa (Ach.) Clauz. & Roux, Porpidia afromontana Brusse; Lecideaceae Chevall. (1826) @EXCL@ Porpidiaceae Hertel & Hafellner (1984); Lecanorales.

Type Information: Basionym: Lichen athroocarpus Ach. ('L. athrocarpus'), Lich. Suec. Prodromus: 77 (1798).

Taxonomic Literature: Taxonomic notes: Thallus cortex 20-50 µm thick, upper cell layer brown to pale brown pigmented; hyphae c. 3-4.5 µm diam.; epinecral layer 35-95 µm thick;
Algal layer c. 65-120 µm thick; algal cells c. 9-11 µm, max. 13-15 µm diam.;
Medulla I+ violet; hyphae 3.5-7 µm thick;
Hypothallus black to grey, obvious between the areoles and at the thallus margin;
Asci c. 85-100 x 15-26 µm;
Pycnidia immersed, conidia cylindrical.
Rambold G., Biblioth. Lichenol. 34: 1-346 (1989).

Biogeography: Continent: Africa, Australasia, Europe, and Northern America.

Ecology: Biotroph; lichenized; episubstratic; substrate non-calciferous.

Thallus: Areolate (primarily areolate); lobes more or less angular (with smooth surface, c. 0.5-0.7 mm, max. 0.8-1.2 mm diam.) at the front; separate thallus parts.1-.7 mm thick. Thallus Size and Differentiation: Large (up to 100 mm diam.). Upper Surface: Brown, plane (to concave).

Ascocarps: Forming independently from the host thallus or mycelium (dispersed to crowded), not emerging, 20-120 per cm², .6-(1.3) mm in diam.. Margin: Later excluded, indistinct (at first usually), 15-30 µm wide. Disk: Plane (to concave), black (to dark grey, matt), epruinose or pruinose. Exciple: Hyphae 3-4 µm wide; grey or dark brown (inner zone colourless to brownish). Epithecium: Apical cells brown (black- to green-). Hymenium: 85-125 µm high; white (I+ yellow to bluish, Iconc +/- orange-red). Subhymenium: 30-120 µm high; white (to brown). Hypothecium: Brown (dark to pale) or white (nearly).

Ascospores: Ellipsoid, 13-19.5-(23) µm long, (6)-7-9.5-(12) µm wide.

Conidia: 6-9-(12) µm long.

Secondary Metabolites: 2'-O-methylmicrophyllinic acid (three chemotypes observed), 2'-O-methylperlatolic acid, confluentic acid, or norstictic acid.

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

(report generated 04.Okt.2007)


In case that additional characters and states are required to be included in this data set, consult the LIAS Instructions to Participants and follow the procedures described there.

LIAS Home