Herzogia 25 (1), 2012: 5 –14 5

Revision of the genera and (, ) in Lithuania, with implications for their conservation

Martin Kukwa & Jurga Motiejūnaitė

Abstract: Kukwa, M. & Motiejūnaitė, J. 2012. Revision of the genera Cetrelia and Punctelia (Lecanorales, Ascomycota) in Lithuania with implications for their conservation. – Herzogia 25: 5 –14. A revision of all available specimens has shown that the Cetrelia in Lithuania is represented by two species, C. monachorum and C. olivetorum. One specimen belonged to Punctelia jeckeri. The distribution and status of both genera in Lithuania are reviewed, distribution maps are provided, and the merits of the segregates for conservation measures are discussed. Cetrelia monachorum and Punctelia jeckeri are reported for the first time from Lithuania and from the Baltic states.

Zusammenfassung: Kukwa, M. & Motiejūnaitė, J. 2012. Revision der Gattungen Cetrelia und Punctelia (Lecanorales, Ascomycota) in Litauen und Schlussfolgerungen zu ihrem Erhalt. – Herzogia 25: 5 –14. Eine Revision allen verfügbaren Materials hat gezeigt, dass die Gattung Cetrelia in Litauen mit zwei Arten vertreten ist, C. monachorum und C. olivetorum. Eine Aufsammlung gehört zu Punctelia jeckeri. Die Verbreitung und der Status beider Gattungen in Litauen werden erörtert und mit Verbreitungskarten dokumentiert. Die Vorteile einer Trennung der Sammelarten für Schutzmaßnahmen wird diskutiert. Cetrelia monachorum und Punctelia jeckeri werden zum ersten Mal aus Litauen und den Baltischen Staaten gemeldet.

Key words: , chemotypes, Baltic states, .

Introduction The foliose lichens Cetrelia W.L.Culb. & C.F.Culb. and Punctelia Krog are two genera in the family Parmeliaceae with punctiform pseudocyphaellae, which are easily distinguished by their sparsely (Cetrelia) or richly (Punctelia) rhizinate lower surface of thalli. Although both genera were thought to be represented by only a few species in cool temperate regions, several taxa have been segregated on the basis of chemical or/and morphological characters (e.g. Culberson 1965, Culberson & Culberson 1968, 1976, Herk & Aptroot 2000, Lendemer & Hodkinson 2010). In case of the genus Cetrelia, some authors recognized the chemical variability only at the chemotype level of a single species (Barbero et al. 1995, Bjelland et al. 1997, Clerc 2004, Santesson et al. 2004, Gilbert & Purvis 2009, Harrold et al. 2009), but others suppor­ ted the recognition of up to five species in Europe (Randlane & Saag 1991, Wirth 1995, Hafellner et al. 2005, Obermayer 2007, Obermayer & Mayrhofer 2007, Sohrabi et al. 2007, Hawksworth et al. 2011) which differ mainly in size and shape of pseudocyphellae and development of soralia. In this paper we accept the latter viewpoint. All four species occurring