Lecanora sp. 1

Bungartz, Frank, Elix, John A. & Printzen, Christian, 2020, Lecanoroid lichens in the Galapagos Islands: the genera Lecanora, Protoparmeliopsis, and Vainionora (Lecanoraceae, Lecanoromycetes), Phytotaxa 431 (1), pp. 1-85 : 19-20

Lecanora sp. 1

( Fig. 5A–B )

Thallus saxicolous, thick, contiguous, rimose-areolate, fissures of secondary areoles with strongly serrate, interlocking edges; surface white to creamish beige, smooth, epruinose to roughened, lacking soredia; prothallus a thin compact, blackened line, most pronounced where different thalli meet. Apothecia not seen. Pycnidia abundant, immersed, ostiole blackened (reddish brown pigment), ±broadened, in appearance similar to immersed, cryptolecanorine apothecia, wall hyaline; conidia shortly filiform, ±curved, 13–18 × ca. 1.0–1.2 µm (n = 30).

Chemistry: Thallus cortex and medulla P–, K–, KC+ pink, C+ pink, UV– (dull yellow); containing lobaric acid [major]; [specimen analyzed with TLC: Aptroot, A. 64396 (CDS 30962)].

Ecology and Distribution: Only one specimen currently known, from an exposed cliff at the shore of North Plaza Island .

Notes: This single specimen is not formally described here, because no apothecia were found. Morphologically the abundantly pycnidiate thallus closely resembles specimens of L. legalloana , L. subimmersa and L. prosecha , but it contains lobaric acid as the only secondary metabolite.

Specimen examined. ECUADOR. GALÁPAGOS: Plaza Norte (near Santa Cruz), 0˚34’47’’S, 90˚9’47’’W, 1 m alt., coastal zone, vertical, S-exposed cliffs and on top of island, inpenetrable thicket of Grabowskia boerhaaviaefolia and Scutia spicata var. pauciflora with occasional Opuntia cacti in between, lava, on rock, 21-Feb-2006, Aptroot, A. 64396 (CDS 30962).

Figures

FIGURE 5. Species in the L. marginata-group. A–B. Lecanora sp. 1 (Aptroot, A. 64396, CDS 30962). A. Rimose-areolate thallus of abundant pycnidia and serrately interlocking fissures. B. filiform conidia. Scales: A, = 5 mm; B = 10 µm.