Message - 7th IAL Symposium

The 7 th International Association for Lichenology Symposium 2012
(2A-2-P16) Submission ID: IAL0279-00001
NEW APPROACH ON THE PUNCTELIA HYPOLEUCITES (PARMELIACEAE) COMPLEX
Canez L. 1 , Pinto Marcelli M. 2
1 Instituto de Ciencias Biologicas, Universidade Federal Do Rio Grande-Furg, Rio Grande, Rio Grande Do Sul, Brazil
2 Nucleo de Pesquisas Em Micologia, Instituto de Botanica, Sao Paulo, Sao Paulo, Brazil
The lichen genus Punctelia (Parmeliaceae, Lecanorales) has been object of recent studies. From the
22 species known at the time of its creation by Krog, now more than 40 species are recognized world-wide.
The main features used to take species apart are presence or absent of propagules, medullar compounds,
lower surface color and conidia type and size. However, some species complexes still remain. According to the
pertinent literature, Punctelia hypoleucites (Nyl.) Krog and P. graminicola (B. de Lesd.) Egan. have brown lower
surface, lecanoric acid as medullar compound, no propagules production and are supposed different each other
by their conidia form: unciform in P. graminicola and filiform in P. hypoleucites. But the revision of the types of
P. graminicola (ASU!), its synonym: P. semansiana (W. Culb. & C. Culb.) Krog (DUKE!, LSU!), and P. hypoleucites
(H-NYL!) and its synonym Parmelia azulensis B. de Lesd. (US!) revealed that the lectotype of P. hypoleucites
has unciform conidia instead of filiform as reported before, conspicuous pseudocyphellae and a laciniate
thallus, while P. graminicola actually has unciform conidia, inconspicuous pseudocyphellae and lobate thallus.
The holotype and isotypes of P. semansiana, and also those additional specimens studied, share characteristics
with P. hypoleucites. As a conclusion, P. semansiana, before considered synonym of P. graminicola, proved to
be a synonym of P. hypoleucites. For those specimens with filiform conidia which previously were treated as
P. hypoleucites, it is more suitable to use the name Parmelia azulensis, which will be soon formally combined
in Punctelia. These conclusions were also confirmed by the study of additional specimens from ASU, DUKE, F,
LSU, O, SP and UCS Acknowledgements: Fundação de Amparo a Pesquisa do Estado de São Paulo – FAPESP
and International Association for Plant Taxonomy – IAPT, for research support.
(2A-2-P17) Submission ID: IAL0281-00001
TYPE STUDIES ON SOREDIATE PARMOTREMA (ASCOMYCOTA, PARMELIACEAE)
WITH SALAZINIC ACID
Spielmann A. A. 1 , Marcelli M. P. 2 , Elix J. A. 3
1 Botany, UFMS, Campo Grande, Mato Grosso Do Sul, Brazil
2 Nucleo de Pesquisas Em Micologia, Instituto de Botanica, Sao Paulo, Brazil
3 Department of Chemistry, Australian National University, Canberra, Australia
Parmotrema A. Massal. 1860 is one of the most diverse genus in Parmeliaceae, with about 350 species,
being specially abundant in South America and other tropical areas of the world. Nevertheless, the species
concepts are still unclear, and several supposed “widely distributed” species include long lists of synonyms,
usually without sound justifications for the choices. Important features like the ontogeny of reproductive structures,
maculation patterns, rhizinal types and conidial data are frequently overlooked. Inside Parmotrema there
is a group of taxa that share the presence of medullar salazinic acid, and this group was selected to be revised
through the types of both accepted names and synonyms. Here we discuss the sorediate taxa (27 species). The
specimens were fully described and chemical substances were identified with spot tests, TLC and HPLC. Several
synonyms were recognized as good species, the ontogeny of the soredia being a crucial characteristic for
differentiate close taxa, as well as the conidial type, development of cilia and dimorphic rhizinae, and the maculation
pattern. Parmotrema reticulatum (Ach.) Hale lose 10 of its 17 accepted synonyms, while to Parmotrema
subsumptum (Nyl.) Hale the species concept is clarified. New structures were recognized as having taxonomical
importance: the arbusculae (= “coralloid isidia”), present in P. coralliforme (Hale) Hale and P. ramusculum (Hale)
Hale, and the botryose structures produced in P. spinibarbe (Kurok.) Hale. Acknowledgments: Fundacao de
Amparo a Pesquisa do Estado de Sao Paulo – FAPESP and British Lichen Society.
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