- Fungi Including Lichens
- ›Ascomycete Fungi
- ›Sac Fungi and Lichens
- ›Common Lichens
- ›wart lichens, script lichens, and allies
- ›Trapeliales
- ›Trapeliaceae
bullseye lichens
Placopsis
Placopsis is a genus of lichen-forming fungi in the family Trapeliaceae. First introduced as a subgenus in 1861 by William Nylander, the genus now comprises about 50 named species worldwide and shows its greatest diversity in the Southern Hemisphere. These lichens are conspicuous crustose to placodioid forms that typically grow on rock or soil, characterised by orbicular or irregularly spreading patches with lobed margins. A defining feature of the genus is the presence of cephalodia, which are nodules containing cyanobacteria that are often centrally placed on the thallus. This distinctive appearance inspired the common name 'bull's-eye lichens' for some North American species.
42 branches of this genus, most-observed first
Placopsis lambii
speciesPlacopsis lambii
Placopsis gelida
speciesPlacopsis gelida
Placopsis perrugosa
speciesPlacopsis perrugosa
Placopsis rhodophthalma
speciesPlacopsis rhodophthalma
Placopsis cribellans
speciesPlacopsis cribellans
Placopsis microphylla
speciesPlacopsis microphylla
Placopsis rhodocarpa
speciesPlacopsis rhodocarpa
Placopsis antarctica
speciesPlacopsis antarctica
Placopsis fusciduloides
speciesPlacopsis fusciduloides
Placopsis lateritioides
speciesPlacopsis lateritioides
Placopsis trachyderma
speciesPlacopsis trachyderma
Placopsis subcribellans
speciesPlacopsis subcribellans
Placopsis argillacea
speciesPlacopsis argillacea
Placopsis centrifuga
speciesPlacopsis centrifuga
Placopsis illita
speciesPlacopsis illita
Placopsis brevilobata
speciesPlacopsis brevilobata
Placopsis salazina
speciesPlacopsis salazina
Placopsis parellina
speciesPlacopsis parellina
Placopsis stenophylla
speciesPlacopsis stenophylla
Placopsis murrayi
speciesPlacopsis murrayi
Placopsis clavifera
speciesPlacopsis clavifera
Placopsis subgelida
speciesPlacopsis subgelida
Placopsis subparellina
speciesPlacopsis subparellina
Placopsis aspicilioides
speciesPlacopsis aspicilioides
Placopsis gelidioides
speciesPlacopsis gelidioides
Placopsis hertelii
speciesPlacopsis hertelii
Placopsis pruinosa
speciesPlacopsis pruinosa
Placopsis durietziorum
speciesPlacopsis durietziorum
Placopsis fuscidula
speciesPlacopsis fuscidula
Placopsis elixii
speciesPlacopsis elixii
Placopsis roseonigra
speciesPlacopsis roseonigra
Placopsis tararuana
speciesPlacopsis tararuana
Placopsis imshaugii
speciesPlacopsis imshaugii
Placopsis bicolor
speciesPlacopsis bicolor
Placopsis campbelliana
speciesPlacopsis campbelliana
Placopsis dennanensis
speciesPlacopsis dennanensis
Placopsis erosa
speciesPlacopsis erosa
Placopsis macrospora
speciesPlacopsis macrospora
Placopsis polycarpa
speciesPlacopsis polycarpa
Placopsis ampliata
speciesPlacopsis ampliata
Placopsis dusenii
speciesPlacopsis dusenii
Placopsis venosa
speciesPlacopsis venosa
Where it lives
Recorded sightings
—
geo-referenced records in GBIF, from museums, herbaria and field observers.
Drag the globe to turn it. Dots are where records exist, not a range map; darker means more records.
In the stacks
Searching the stacks…
Every page naming Placopsis in the Biodiversity Heritage Library →
This page is assembled live from iNaturalist, GBIF, Wikipedia, the Source Library and the Internet Archive. It is not yet part of the hand-edited codex. iNaturalist taxon 175426.