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Message - 7th IAL Symposium

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Lichen: from genome to ecosystem in a changing world<br />

3A-P<br />

(3A-P18) Submission ID: <strong>IAL</strong>0201-00002<br />

DIVERSITY AND PHYLOGENY OF THE GENUS LOBARIELLA (LOBARIACEAE)<br />

Moncada Cardenas B. 1 , Betancourt L. 1 , Lücking R. 2<br />

1 Licenciatura en Biologia, Universidad Distrital Francisco Jose de Caldas, Bogota, Distrito Capital, Colombia<br />

2 Department of Botany, The Field Museum, Chicago, United States<br />

The lichen genus Lobariella is characterized within the family Lobariaceae by a white-tomentose underside<br />

lacking cyphellae, pseudocyphellae, and veins, but instead having pseudocyphellae on the upper surface,<br />

resembling those of Parmelia. For some time, the genus was considered to include five species: Lobariella<br />

botryoides (Yoshim. & Arv.) Moncada & Lücking, L. crenulata (Hook. in Kunth) Yoshim. (type species), L. exornata<br />

(Zahlbr.) Yoshim., L. pallida (Hook. f.) Moncada & Lücking, and L. subexornata (Yoshim.) Yoshim. The latter<br />

four species have a green photobiont, whereas L. botryoides has cyanobacterial photobiont. In the frame of a<br />

survey of Lobariaceae in Colombia and adjacent areas, we came across three further, undescribed species of<br />

this genus: L. sipmanii Moncada, Betancourt & Lücking, with cyanobacterial photobiont and otherwise morphologically<br />

intermediate between L. crenulata and L. pallida; L. soredians Moncada, Betancourt & Lücking spec.<br />

nova., similar to L. botryoides but with marginal soredia rather than laminal isidia becoming sorediate, and L.<br />

flavomedullosa Moncada, Betancourt & Lücking spec. nova, close to L. crenulata but with pale yellow medulla. A<br />

molecular phylogeny based on nuclear ITS confirms the validity of these species and also suggests that Lobariella<br />

should be retained at the generic level, along with further division of Lobaria s.lat. into three to four additional<br />

genera. Lobariella is an exclusively neotropical genus and found at mid to high elevations in rain and cloud forest<br />

as well as paramo. Lobariella botryoides, L. pallida, L. sipmanii, and L. soredians are more characteristic of upper<br />

montane cloud forest and paramo vegetation, whereas the other four species, all with green photobiont, are<br />

more typically found in montane rain and cloud forest. Each of the eight recognized species is illustrated and a<br />

key to all species is presented.<br />

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