Department of Botany,
Bharathiar University, Coimbatore - 641 046
Heterodermia antillarum (Vain.) Swinscow & Krog
Family :
Physciaceae
Swinscow & Krog, Lichenologist 8: 114. 1976
Basionym: Anaptychia granulifera var. antillarum Vainio, Suomal. Tiedeakat Toim, ser. A, 6: 63. 1914
ID :
BU/BRL/2022/008
Thallus :
Foliose, orbicular to irregularly spreading, adnate, comparatively small, up to 4 cm wide
Lobes :
0.5–1.0 mm wide, to ca. 1.5–2.5 mm wide at the tips, ± plane, sublinear-elongate, usually richly sympodially branched, not ascending, eciliate
Upper Side:
Whitish gray to brownish gray, darker at the lobe apices, occasionally sparsely pruinose
Isidia :
Isidiate; isidia usually marginal, more rarely laminal, marginal isidia prominent at the periphery of the thallus, flattened to cylindrical, eventually becoming coralloid
Lower Side :
Corticate, whitish to pale brown, rarely dark gray, smooth to corrugated. Lower surface rhizines frequent, evenly distributed on the lower surface, simple or irregularly branched, usually short (ca. 1 mm long), pale to dark brown or black
Medulla :
White, partly orange (decomposed salazinic acid)
Rare, laminal, adnate to substipitate, 0.5–3.0 mm wide; margin densely mealy pruinose, becoming isidiate; disc concave, dark brown, epruinose
Apothecia :
Pachysporaria-type, ellipsoidal, 23–30 × 12–18 μm. Pycnidia ± common, immersed; conidia bacilliform, 4–6 × 1 μm
Ascospores :
Cortex K+ yellow, C–, KC–, P+ yellow; medulla K+ yellow then red, C–, P+ yellow-orange; containing atranorin (major), zeorin (major), 16β-acetoxyhopane-6α,22-diol (minor), leucotylin (minor), salazinic acid (major), hypoconstictic acid (submajor), 3-O-methylconsalazinic acid (minor), consalazinic acid (minor)
Chemistry :
