Preliminary version 1 October 2013
Stirtonia dubia A. L. Sm.
Trans. Brit. Mycol. Soc. 11: 195 (1926).
Synonym: Index Fungorum
Type: India, Bengal, Chinsurah, on tree, s.d., Watt (BM - isolectotype).
Barcode:
Coordinates:
Thallus: crustose, spreading, covering an area of up to 5 cm diameter, contiguous, smooth, grey whitish, less than 0.1 mm thick, slightly shiny. Ascigerous zones seemingly not delimited but in fact lirelline and branched, ca. 0.1 mm wide, not raised, whitish, pruinose, inconspicuously dotted when abraded, with small crystals, without algae. Asci visible as pale brown dots in surface view, globose to ovoid, with 8 ascospores. Ascospores 6-7-septate, ellipsoid, 15-30 / 6-8 µm, cells generally equal, walls and septa >1 µm thick (Aptroot 2009: 620).
Photobiont: Green alga.
Chemistry: No lichen substances (TLC). Thallus and ascigerous zones C-, Pd-, KOH-, UV- (Aptroot 2009: 620).
Ecology: on bark.
Molecular data: Genbank
Distribution: Database
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