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Australian Biological Resources Study

Checklist of the Lichens of Australia and its Island Territories
Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References
Phyllopsora isidiotyla (Vain.) Riddle

Mycologia 15: 81 (1923)

Lecidea isidiotyla Vain., Étud. Class. Lich. Brésil 2: 49 (1890).

T: Lafayette, Minas Gerais, Brazil, 1885, E.A.Vainio, Lich. Bras. Exs. No. 222; holo: TUR-V 22634; iso: BM, M, UPS, ZT.

  Thallus crustose to areolate or subsquamulose, effuse, formed by the prothallus and by minute granular to irregular areolae and by isidia developing directly from the prothallus; isidia usually dominating. Prothallus well developed, white to pale reddish brown. Areolae c. 0.05–0.10 mm wide, granular to elongate, plane to weakly convex, dark green or pale to dark brown, ±delicately fibrillose. Isidia usually abundant, thin, irregularly cylindrical and finely branched. Upper cortex of type 1, 5–10 μm thick. Apothecia common, 0.5–1.0 mm wide, ±rounded to irregular in outline, scattered, solitary, concave to slightly convex, yellow-brown; margin raised, usually paler than the disc, pubescent, with abundant pale projecting fibrils. Proper exciple yellow-brown to pale at the margin. Epihymenium yellow-brown to red-brown. Hymenium yellow-brown. Hypothecium yellow-brown to red-brown. Ascospores simple, ellipsoidal to short-fusiform, 7.5–12.5 × 2.0–3.5 μm. Pycnidia uncommon, superficial, tan to yellow-brown. Conidia bacilliform, straight, 11–12 × 0.5–1.0 μm.
CHEMISTRY: Cortex and medulla K–, C–, KC–, P–; containing atranorin (minor or trace), ±zeorin (minor).
  Rare on the bark of trees in monsoon vine forest in northern N.T. Also known from North, Central and South America.  
  Elix (2009h)  

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Introduction | A–D | E–O | P–R | S–Z | Oceanic Islands | References

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