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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
Chapsa leprocarpa (Nyl.) Frisch

in A.Frisch, K.Kalb & M.Grube, Biblioth. Lichenol. 92: 108 (2006)

Graphis leprocarpa Nyl., Acta Soc. Sci. Fenn. 7: 472 (1863); — Thelotrema leprocarpum (Nyl.) Tuck., Gen. Lich. 139 (1872); — Graphina leprocarpa (Nyl.) Zahlbr., Cat. Lich. Univ. 2: 412 (1923).

T: Louisiana, U.S.A., 1853, J.Hale 111; holo: FH-TUCK; iso: H-NYL 6839.

Thelotrema colobicum Nyl., Bull. Soc. Linn. Normandie, sér. 2, 7: 169 (1873). T: Andaman Islands, 1867, S.Kurz 43; holo: M; iso: H-NYL 22493.

  Thallus usually endophloeodal, to c. 70 µm thick, pale grey to pale greyish green, dull, uneven to somewhat pruinose, often with the substratum protruding, continuous, non-rimose. Cortex and pseudocortex absent. Algal layer poorly developed, largely discontinuous; calcium oxalate crystals absent to moderately abundant, usually small, scattered or clustered. Vegetative propagules not seen. Ascomata conspicuous, to c. 1.7 mm diam., ±rounded to slightly irregular, especially in fused ascomata, apothecioid to chroodiscoid in older ascomata, erumpent, solitary to fused, occasionally regenerating, immersed. Disc partly to completely visible from above, greyish, usually distinctly whitish-pruinose. Proper exciple not visible from above or visible when becoming partly detached, whitish; thalline rim margin irregular, usually coarsely split, with large lobes, sometimes eroded, rarely slightly to distinctly layered, whitish-pruinose internally, concolorous with the thallus marginally, becoming erect to ±recurved. Proper exciple thin to somewhat evanescent, hyaline internally to pale yellowish to pale orange marginally; apical parts covered by greyish granules, slightly to distinctly amyloid at the base. Hymenium to c. 140 µm thick, weakly conglutinated; paraphyses straight to slightly bent, parallel to slightly interwoven, the tips thickened; lateral paraphyses conspicuous, to c. 30 µm long, with fine granules. Epihymenium thick, hyaline, with coarse greyish brown granules. Asci 1 (–2)-spored; tholus initially thin, not visible at maturity. Ascospores muriform, oblong to slightly fusiform, with ±rounded or narrowly rounded ends, hyaline, non-amyloid, 60–130 × 20–40 µm, with numerous locules; locules small, angular to ±rounded; transverse septa distinct, thin, regular; ascospore wall thin, with a thin or thick halo, then strongly thickened at the ends; endospore thin.
CHEMISTRY:Thallus K–, C–, P–; no compounds detectable by TLC.
  Common on bark in rainforest in north-eastern Qld and north-eastern N.S.W., from sea level to 1100 m; mainly pantropical.  
  Mangold et al. (2009)  

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

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