A member of the Porpidia macrocarpa group (Haplocarpon) distinguished from other species of Porpidia by the presence of papillate isidia.

Known only from ultamafic rocks at three localities in Europe. Ultramafic sites in general are under threat from deforestation, mining, exotic species invasions, and atmospheric deposition of pollutants such as heavy metals or previously limiting nutrients such as nitrogen.

One locality in each of Czech Republic, Spain, and United Kingdom

Unknown. Last collected in 1997

Occurs only on exposed ultramafic rocks

Ultramafic substrata are undergoing drastic changes due to ever-expanding development, deforestation, mining, exotic species invasions, and atmospheric deposition of pollutants such as heavy metals or previously limiting nutrients such as nitrogen (Williamson & Balkwill 2006; Rajakaruna & Boyd 2008; Harrison & Rajakaruna 2011). Such changes can have a drastic impact on the biota of these unique habitats.

Surveys in support of conservation efforts should be encouraged to document the wealth of biological diversity frequently being lost from such sites worldwide. These sites should be better explored to generate data for effective conservation planning.

Fryday, A.M. 2005: The genus Porpidia in northern and western Europe, with special emphasis on collections from the British Isles. Lichenologist 37(1): 1-35.

Palice, Z., Slavíková-Bayerová, S., Gruna, B., Liska, J. Uhlík, P. 2005: Poznámka k vyskytu Porpidia nadvornikiana v Ceské Republice [A note on the occurrence of Porpidia nadvornikiana in the Czech Republic]. Bryonora 35: 6-8.

Rajakaruna, N., Knudsen, K., Fryday, A.M., O’Dell, R.E., Pope, N., Olday, F.C. & Woolhouse, S. 2012: Investigation of the importance of rock chemistry for saxicolous lichen communities of the New Idria serpentinite mass, San Benito County, California, USA. Lichenologist 44: 695-714.

Sánchez-Biezma, M.J. & López de Silanes, M.E. 1999: Porpidia nadvornikiana, a species of ultrabasic rocks: second record for Europe. Lichenologist 31(6): 637-639.

Vezda, A. 1972: Haplocarpon nadvornikianum Vezda sp. nov. Preslia 44: 208-212.
Williamson, S. D. & Balkwill, K. (2006) Factors determining levels of threat to serpentine endemics. South African Journal of Botany 72: 619–626.