Placopsis lambii
{{Short description|Species of lichen}}
{{Use dmy dates|date=October 2023}}
{{Speciesbox
| image = Placopsis lambii Jymm.jpg
| image_caption =
| taxon = Placopsis lambii
| authority = Hertel & V.Wirth (1987)
| synonyms = *Squamaria gelida f. dispersa {{au|Cromb. (1873)}}
}}
Placopsis lambii is a species of saxicolous (rock-dwelling), crustose lichen in the family Trapeliaceae. It was formally described as a new species in 1987 by lichenologists Hannes Hertel and Volkmar Wirth. The species epithet lambii honours polar explorer and lichenologist Elke Mackenzie (formerly Lamb). In North America, one vernacular name for the lichen is pink bull's-eye lichen.
Placopsis lambii is distinguished by its {{lichengloss|placodioid}} thallus that features deeply notched and radiating edge {{lichengloss|lobes}}, a glossy upper surface, typically dark and somewhat rounded soralia, and non-lobate cephalodia that may be absent in certain samples. This species predominantly produces 5-O-methylhiascic and gyrophoric acids.
Placopsis lambii has a widespread but scattered distribution. It has been recorded from many countries in Europe, Africa (Kenya, Lesotho, and Tanzania), South America (Bolivia, Chile), Central America (Costa Rica, Ecuador), New Zealand, and Asian Russia.
References
{{Reflist|refs=
{{cite web |title=Synonymy. Current Name: Placopsis lambii Hertel & V. Wirth, in Wirth, Die Flecht. Baden-Württembergs. Verbreitungsatlas (Stuttgart): 511 (1987) |url=https://www.speciesfungorum.org/Names/SynSpecies.asp?RecordID=132762 |publisher=Species Fungorum |access-date=18 October 2023}}
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{{Taxonbar|from=Q10430950}}
Category:Lichens described in 1987
Category:Lichens of Central America
Category:Lichens of South America
Category:Lichens of New Zealand
Category:Taxa named by Hannes Hertel
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