Punctelia eganii Hodkinson & Lendemer

Opuscula Philolichenum 9: 35 (2011).

 

 

Protolog: Sicut Punctelia rudecta sed lichexanthonum continens.

Protolog type data: TYPE: U.S.A. Alabama. Monroe Co.: Haines Island Park, forest trail near boat ramp, public recreation area operated by the U.S. Army Corps of Engeneers, 20 mi N of Monroeville, along the Alabama River, 50 ft. elev., beech-Magnolia forest, 31.vii.2003, on bark, R.S. Egan 16197-A (NY, holotype).

Type locality: USA, Alabama, Monroe County, Haines Island Park, forest trail near boat ramp, public recreation area operated by the U.S. Army Corps of Engeneers, 20 miles north of Monroeville, along the Alabama River, beech-Magnolia forest, on bark, 15 meters, 31.7.2003, R.S. Egan 16197-A (NY - holotype).

Thallus: foliose, lobate, ididiate; lobes irregularly branched, 1.0-2.5 mm wide, adnate to loosely adnate (?), continuous to overlapping laterally, apices round, margins plane to somewhat upturned and often with a narrow brown band; upper surface continuous, glabrous, epruinose with some shallow poorly defined ridges, lacking scrobiculae; isidia abundant, corticate, simple and cylindrical to abundantly branched and coralloid, brown tipped, laminal and arising from both the pseudocyphellae and cracks in the thallus cortex; 0.2-0.5 mm tall; maculae absent; pseudocyphellae white, laminal, circular and punctiform, sometimes becoming sublinea, variable in size (˜0.1-0.3 mm in diameter); medulla white, lacking pigments; lower surface pale brown to white, glabrous, smooth; rhizines sparse not forming a tomentum, concolorous with the underside or slightly darker brown, simple or occasionally branched, 0.3-0.8(>1.0) mm in length. Apothecia unknown. Pycnidia unknown (Hodkinson & Lendemer 2011: 37).

Photobiont: Trebouxioid green alga.

Chemistry: Atranorin (? low concentration in the cortex and not detected with TLC; see Culberson and Culberson (1956), lichexanthone (restricted to the pseudocyphellae); lecanoric acid (medulla). Spot tests: cortex K-, C-, KC-, P-, UV-; pseudocyphellae K-, C+ red, KC+ red, P-, UV+ bright yellow; medulla, K-, C+ red, KC+ red, P-, UV- (Hodkinson & Lendemer 2011: 37).

Ecology: On bark.

Molecular data: Genbank

Distribution: Known only from the type specimen.

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