• Source: Dirinaria picta

Dirinaria picta is a species of lichen within the family Caliciaceae, classified under the order Caliciales in the class Lecanoromycetes of the division Ascomycota.




Etymology


The specific epithet "picta" means "painted or variegated".




Description


Dirinaria picta forms suborbicular to spreading thalli, closely attached to the substrate, and can be saxicolous or corticolous. The lobes are stellate-radiating, contiguous, and pinnatifid to multifid, typically measuring 1-1.5 mm wide. They are generally discrete at the periphery, with acute to rounded apices that are not flabellate confluent.
The upper surface is glaucous-white to pale grey, smooth, and sometimes faintly pruinose at the apices. Soralia are laminal, capitate, and sparsely distributed, with soredia that are fine and powdery. The lower surface is black. Apothecia are occasionally present, with a disc that is black and subpedicellate. Ascospores are biseriate and measure 12-21 × 5-9 μm.




Distribution


Dirinaria picta is distributed in various locations, including the Kermadec Islands, Bangladesh, and several regions in New Zealand. It is also widely recorded from tropical areas from both hemispheres.




Habitat


This species is typically found on the bark of various tree species, including Rhopalostylis sapida, orange trees, Kunzea spp., Leptospermum scoparium, and Metrosideros excelsa. It also grows on fenceposts in open grassland areas.




Similar taxa


Dirinaria picta can be distinguished from Dirinaria applanata by its pinnately or subpinnately divided lobes, which are discrete at the periphery, with narrow to oblong apices. Additionally, the thallus of D. picta is less wrinkled-plicate compared to that of D. applanata.




Substrate


The species Dirinaria picta typically thrives on bark surfaces, a habitat known as corticolous.




References






Further reading


Awasthi, D.D. (1975) A Monograph of the Lichen Genus Dirinaria. - Bibliotheca Lichenologica No. 2, J. Cramer, Lehre. 108 pp. (RLL List # 93-3 / Rec. # 1294 - Recent Literature on Lichens) (Illustrations of Dirinaria picta: figs. 42, 43, 44 & 45)
\Brodo, I.M.; Sharnoff, S.D. and Sharnoff, S. (2001) Dirinaria (pp. 305-307) In, Lichens of North America. Yale University Press, New Haven, 795 pages. (Discussion of Dirinaria picta: pp. 306-307; distribution map for North America: p. 306; color photo: p. 307, plate 318)
GASPARYAN A, SIPMAN HJM, LÜCKING R. Ramalina europaea and R. labiosorediata, two new species of the R. pollinaria group (Ascomycota: Ramalinaceae), and new typifications for Lichen pollinarius and L. squarrosus. The Lichenologist. 2017;49(4):301-319. doi:10.1017/S0024282917000226
Kalb, K. (2004). "Dirinaria". In Nash III, T.H.; Ryan, B.D.; Diederich, P.; Gries, C.; Bungartz, F. (eds.). Lichen Flora of the Greater Sonoran Desert Region, Vol. 2. Tempe, Arizona: Lichens Unlimited. pp. 98–103. ISBN 0971675910.
Thomson, J.W. (1963) The Lichen Genus Physcia in North America. - Beihefte zur Nova Hedwigia, Heft 7. J. Cramer. viii + 172 pp. (RLL List # 46 / Rec. # 18472 - Recent Literature on Lichens) (Illustration of Dirinaria picta: plate 46)




External links


Checklist of the Lichens of Australia and its Island Territories
Elix (2009) Australian lichens - Discussion of Dirinaria picta
USDA Plants Database
North American Lichen Checklist, Version (#16) 18 June 2010.
LIAS
Index Fungorum
MycoBank




= Links to photos

=
Pictures of tropical lichens - Dirinaria picta
Stephen Sharnoff's Lichen Photos - Dirinaria picta

Kata Kunci Pencarian:

• Dirinaria picta
• Dirinaria
• D. picta
• List of lichens of Western Australia
• List of lichens of Rwanda
• Caliciaceae
• Niebla disrupta