taxonID	type	description	language	source
FABBEBBC9C46543FB64CAC4C9EA452F3.taxon	description	Fig. 2 A	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
FABBEBBC9C46543FB64CAC4C9EA452F3.taxon	diagnosis	Diagnosis. Differs from P. dolomitica and P. westbergii in having only a slightly rimose thallus.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
FABBEBBC9C46543FB64CAC4C9EA452F3.taxon	description	Description. Thallus grey, slightly rimose, ca. 0.02 – 0.05 mm thick, K-, UV-. Apothecia orange, 0.2 – 0.5 mm, slightly convex to convex, 1 / 2 - immersed in thallus; ca. 60 apothecia / cm 2. Epihymenium brown-yellow to orange-brown, 12 – 15 μm thick, K + violet. Hymenium 50 – 60 μm thick. Hypothecium red-violet, ca. 50 – 60 μm thick. Paraphyses ca. 1.5 – 2 μm thick, apex not thickened. Ascospores 0 - septate, (10.3 –) 11.8 – 12.8 – 13.8 (– 15.1) × (5.3 –) 5.7 – 6.8 – 7.8 (– 9.4) μm (n = 27).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
FABBEBBC9C46543FB64CAC4C9EA452F3.taxon	etymology	Etymology. The specific epithet is in honour of Dr Ulf Arup (Lund) for his many important contributions on the taxonomy (particularly Teloschistaceae and Lecanoraceae) and biogeography of especially Fennoscandian lichens.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
9C8CA1D62BD650B2A2EE4956005B2AA6.taxon	description	Fig. 2 B	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
9C8CA1D62BD650B2A2EE4956005B2AA6.taxon	diagnosis	Diagnosis. Differs from P. rupestris in having a mostly rimose thallus.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
9C8CA1D62BD650B2A2EE4956005B2AA6.taxon	description	Description. Thallus white to pale grey, endolithic (rarely), rimose (usually) to areolate, areoles 0.1 – 0.8 mm, ca. 0.02 – 0.2 mm thick, K-, C-, UV- to UV + bluish-white, algal cells 5 – 12 (– 17) μm. Apothecia yellow-orange to dirty brown-orange, 0.2 – 1.0 mm, slightly convex to strongly convex, ½ - immersed in thallus to superficial, occasionally leaving shallow pits, K + violet; ca. 30 – 140 apothecia / cm 2. Epihymenium orange-brown, 10 – 18 μm thick, K + violet. Hymenium 50 – 90 (– 100) μm thick. Hypothecium colourless to pale yellow, rarely lower part reddish-brown, occasionally with oil droplets, ca. 40 – 160 μm thick. Paraphyses ca. (1.5 –) 2 – 2.5 μm thick, apex not or slightly thickened, sparingly branched and anastomosing. Ascospores 0 - septate, (7.6 –) 9.6 – 11.2 – 12.7 (– 16.1) × (4.8 –) 5.4 – 6.2 – 7.0 (– 7.7) μm (n = 146).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
9C8CA1D62BD650B2A2EE4956005B2AA6.taxon	etymology	Etymology. The name refers to the geographic distribution of the species in the boreal vegetation zone.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
F2FB6207636D5608A655A6F95C6B5CAC.taxon	description	Description. Thallus white to whitish-grey, rimose to areolate, areoles 0.2 – 0.5 mm, ca. 0.02 – 0.2 mm thick, K-, C-, UV-, algal cells 5 – 8 μm. Apothecia orange-yellow to orange, 0.3 – 0.6 mm, strongly convex, superficial, not leaving pits to leaving shallow pits, K + violet; ca. 40 – 100 apothecia / cm 2. Epihymenium dark orange-brown, 12 – 15 μm thick, K + violet. Hymenium 80 – 100 μm thick. Hypothecium colourless to pale yellow, ca. 100 – 180 μm thick. Paraphyses ca. 2 – 2.5 μm thick, apex slightly thickened, often branching. Ascospores 0 - septate, (7.6 –) 9.4 – 10.7 – 12.0 (– 12.7) × (4.4 –) 5.2 – 5.9 – 6.7 (– 7.8) μm (n = 29).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
05B49C280BF1579BB75280480A65D4C3.taxon	description	Fig. 2 C	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
05B49C280BF1579BB75280480A65D4C3.taxon	diagnosis	Diagnosis. Differs from P. pseudocompressa in having plane to slightly convex apothecia.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
05B49C280BF1579BB75280480A65D4C3.taxon	description	Description. Thallus white to pale grey, continuous, rimose to rarely areolate, areoles 0.2 – 0.8 mm, ca. 0.01 – 0.15 mm thick, K-, C-, UV- to UV + bluish-white, algal cells 4 – 9 μm. Apothecia yellow, yellow-orange to orange, 0.2 – 0.8 mm, plane to slightly convex, 1 / 4 – 1 - immersed in thallus, occasionally leaving shallow pits, K + violet; ca. 20 – 190 apothecia / cm 2. Epihymenium orange-brown, 12 – 18 μm thick, K + violet. Hymenium 50 – 60 μm thick. Hypothecium colourless to yellow, ca. 40 – 100 μm thick. Paraphyses ca. 2 – 2.5 μm thick, apex not thickened to slightly thickened, sparingly branched and anastomosing. Ascospores 0 - septate, (8.6 –) 9.8 – 11.4 – 12.6 (– 13.5) × (4.8 –) 5.1 – 5.9 – 6.7 (– 7.4) μm (n = 45).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
05B49C280BF1579BB75280480A65D4C3.taxon	etymology	Etymology. The name refers to the flattened apothecia of the species.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
B5E2DF0491C05E7B94AC65B8593D8E2E.taxon	description	Fig. 2 D	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
B5E2DF0491C05E7B94AC65B8593D8E2E.taxon	diagnosis	Diagnosis. Differs from P. siebenhaariana in having more densely occurring apothecia and from P. arupii in having a rimose to areolate thallus and often olive-yellow apothecia.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
B5E2DF0491C05E7B94AC65B8593D8E2E.taxon	description	Description. Thallus white to whitish-grey, rarely pale brown, rimose to areolate, areoles 0.2 – 0.9 mm, ca. 0.03 – 0.25 mm thick, K-, C-, UV-, one specimen UV + bluish-white, algal cells 4 – 8 (– 12) μm. Apothecia yellow to dirty orange-yellow, sometimes olive-yellow, 0.15 – 0.7 mm, plane, slightly convex to convex, 1 / 2 - immersed in thallus; ca. 40 – 160 apothecia / cm 2. Epihymenium dirty olive-yellow to orange-brown, 12 – 20 μm thick, K + violet. Hymenium 50 – 70 μm thick. Hypothecium dark brown, reddish-brown or usually violet, ca. 40 – 100 μm thick. Paraphyses ca. 1.5 – 2 μm thick, apex not thickened to slightly thickened, branching. Ascospores 0 - septate, (7.6 –) 11.0 – 12.8 – 14.7 (– 19.4) × (4.4 –) 4.8 – 5.4 – 5.9 (– 7.4) μm (n = 117).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
B5E2DF0491C05E7B94AC65B8593D8E2E.taxon	etymology	Etymology. The species grows on dolomite rocks.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
D403566327F65D71B1AEEBE6C97A9B99.taxon	description	Fig. 3 A	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
D403566327F65D71B1AEEBE6C97A9B99.taxon	diagnosis	Diagnosis. Differs from P. borealis in having a thicker hypothecium.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
D403566327F65D71B1AEEBE6C97A9B99.taxon	description	Description. Thallus white to greyish-white, rimose to areolate, areoles 0.3 – 0.6 mm, ca. 0.05 – 0.2 mm thick, K-, UV + bluish-white, algal cells 5 – 8 μm. Apothecia dirty brown-orange, 0.4 – 0.8 mm, convex to strongly convex, superficial; ca. 30 – 50 apothecia / cm 2. Epihymenium dark orange-brown, 10 – 20 μm thick, K + violet. Hymenium 50 – 70 μm thick. Hypothecium yellowish-white, ca. 120 – 200 μm thick, in some apothecia base patchily red-violet. Paraphyses ca. 2 – 2.5 μm thick, apex not or slightly thickened. Ascospores 0 - septate, (8.1 –) 8.7 – 10.2 – 11.6 (– 12.5) × (5.0 –) 5.1 – 5.9 – 6.6 (– 7.2) (n = 12).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
D403566327F65D71B1AEEBE6C97A9B99.taxon	etymology	Etymology. The name is in honour of Dr Stefan Ekman (Uppsala) for his many important contributions on the phylogeny and taxonomy of lichens in Fennoscandia and elsewhere.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
EC602A5E49655BDD8DC0FBF1BFE0AD57.taxon	description	Fig. 3 B	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
EC602A5E49655BDD8DC0FBF1BFE0AD57.taxon	diagnosis	Diagnosis. Differs from P. calvella in having thinner hymenium, from P. minuta in having rimose to areolate thallus and from P. rikkinenii in usually having more densely occurring apothecia.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
EC602A5E49655BDD8DC0FBF1BFE0AD57.taxon	description	Description. Thallus white to pale greyish-brown, rimose to areolate, areoles 0.15 – 1.0 mm, ca. 0.03 – 0.25 mm thick, K-, C-, UV-, algal cells 5 – 10 μm. Apothecia yellow, orange-yellow to orange, 0.3 – 0.9 mm, plane to strongly convex, immersed in thallus to superficial; ca. 20 – 110 apothecia / cm 2. Epihymenium orange-yellow to brown, 12 – 20 μm thick, K + violet. Hymenium 50 – 80 μm thick. Hypothecium colourless to yellow, base sometimes patchily reddish-brown, ca. 60 – 280 μm thick. Paraphyses ca. 2 – 3 μm thick, cells 5 – 8 μm long, apex not thickened to slightly thickened, sparingly branched and anastomosing. Ascospores 0 - septate, (6.6 –) 8.7 – 10.0 – 11.3 (– 12.5) × (4.2 –) 4.8 – 5.3 – 5.9 (– 7.2) μm (n = 93).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
EC602A5E49655BDD8DC0FBF1BFE0AD57.taxon	etymology	Etymology. The species occurs in the most northern, almost arctic (oroarctic) sites in Finland (Fennia).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
26F7C1B6407055EBA01BCB72E0DFB756.taxon	description	Description. Thallus white to grey, endolithic, farinose to small areoles, K-, C-, UV- to UV + bluish-white, algal cells 3 – 8 μm. Apothecia orange to dark orange, 0.2 – 0.6 mm, slightly convex to strongly convex, 1 / 4 - immersed to superficial, sometimes leaving shallow pits, K- or K + fairly weakly red; ca. 40 – 100 apothecia / cm 2. Epihymenium (yellowish) orange-brown, 12 – 20 μm thick, K- to K + orange or carmine red, not into solution. Hymenium 50 – 120 μm thick, with oil droplets. Hypothecium pale yellow, sometimes patchily violet, ca. 60 – 120 μm thick. Paraphyses ca. 2 – 3 μm thick, apex not thickened to slightly thickened, sparingly branched and anastomosing. Ascospores 0 - septate, (8.4 –) 10.7 – 12.4 – 14.2 (– 16.6) × (5.2 –) 6.0 – 6.7 – 7.3 (– 7.8) μm (n = 30).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
A4AF1B5F60E45D47BAD7F03E6789169D.taxon	description	Fig. 3 C	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
A4AF1B5F60E45D47BAD7F03E6789169D.taxon	diagnosis	Diagnosis. Differs from the other Protoblastenia species with a pale hypothecium in having small apothecia and spores and apothecia which leave pits.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
A4AF1B5F60E45D47BAD7F03E6789169D.taxon	description	Description. Thallus ochraceous, endolithic, K-, UV-. Apothecia orange, 0.2 – 0.4 mm, slightly convex to strongly convex, immersed in rock to superficial, leaving shallow to fairly deep pits; ca. 80 apothecia / cm 2. Epihymenium brown-yellow, 10 – 12 μm thick, K + violet. Hymenium 45 – 55 μm thick. Hypothecium colourless to yellow, ca. 70 – 100 μm thick. Paraphyses ca. 2 – 3 μm thick, apex not thickened to slightly thickened. Ascospores 0 - septate, (7.3 –) 7.6 – 7.9 – 8.3 (– 8.8) × (4.1 –) 4.3 – 4.5 – 4.7 (– 4.8) μm (n = 9).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
A4AF1B5F60E45D47BAD7F03E6789169D.taxon	etymology	Etymology. The name refers to the small size of the apothecia and spores.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
FE5B4688BA79556AB55401286B667578.taxon	description	Fig. 3 D	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
FE5B4688BA79556AB55401286B667578.taxon	diagnosis	Diagnosis. Differs from P. lilacina in often having slightly larger and more sparse apothecia and an often thicker hypothecium.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
FE5B4688BA79556AB55401286B667578.taxon	description	Description. Thallus white to whitish-grey, endolithic, farinose or rimose, ca. 0 – 0.1 mm thick, K-, C-, UV- to UV + bluish-white, algal cells 5 – 9 μm. Apothecia orange to dark orange, 0.3 – 0.9 mm, convex to strongly convex, 1 / 4 - immersed to superficial, often leaving shallow pits, K + weakly red; ca. 10 – 50 apothecia / cm 2 (in one specimen, ca. 50 – 80 apothecia / cm 2). Epihymenium dark orange-brown, 12 – 25 μm thick, K- to K + orange or carmine red. Hymenium 70 – 120 μm thick, with oil droplets, in one specimen, partly violet in few apothecia. Hypothecium colourless to yellow, more rarely patchily red-brown, ca. 60 – 220 μm thick. Paraphyses ca. 2 – 3 μm thick, apex not thickened to slightly thickened, sparingly branched and anastomosing. Ascospores 0 - septate, (8.8 –) 11.8 – 13.9 – 16.0 (– 18.8) × (5.2 –) 6.6 – 7.4 – 8.2 (– 9.6) μm (n = 92).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
2B50F168D1BC5381A71F8B819B54D36C.taxon	description	Fig. 4 A	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
2B50F168D1BC5381A71F8B819B54D36C.taxon	diagnosis	Diagnosis. Differs from P. compressa in often having convex apothecia.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
2B50F168D1BC5381A71F8B819B54D36C.taxon	description	Description. Thallus white to grey, continuous, rimose (usually) to areolate, rarely endolithic, ca. 0 – 0.15 mm thick, K-, C-, UV- to UV + bluish-white, algal cells 6 – 12 μm. Apothecia orange-yellow to orange, 0.2 – 0.7 mm, plane to strongly convex, 1 / 4 – 1 - immersed in thallus or rock to superficial, sometimes leaving shallow pits; ca. 20 – 120 apothecia / cm 2. Epihymenium yellow-brown to orange-brown, 12 – 18 μm thick, K + violet. Hymenium 50 – 60 μm thick. Hypothecium colourless to pale yellow, rarely pink (in one specimen), ca. 50 – 120 μm thick. Paraphyses ca. 1.5 – 2.5 μm thick, sparsely branched and anastomosing. Ascospores 0 - septate, (6.8 –) 9.1 – 10.6 – 12.1 (– 13.0) × (4.2 –) 4.7 – 5.5 – 6.2 (– 8.0) μm (n = 51).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
2B50F168D1BC5381A71F8B819B54D36C.taxon	etymology	Etymology. The name refers to the close relationship in ITS and morphological similarity to P. compressa.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
7265A0B018825346AC78143B76781C9F.taxon	description	Fig. 4 B	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
7265A0B018825346AC78143B76781C9F.taxon	diagnosis	Diagnosis. Differs from P. terricola in having a thinner thallus and hypothecium.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
7265A0B018825346AC78143B76781C9F.taxon	description	Description. Thallus white, rimose, ca. 0.05 – 0.1 mm thick, K-, UV + bluish-white. Apothecia orange (young apothecia) to dirty orange-brown, 0.3 – 0.8 mm, convex to strongly convex, superficial; ca. 30 apothecia / cm 2. Epihymenium orange-brown, 10 – 15 μm thick, K + violet. Hymenium 70 μm thick. Hypothecium dark reddish-brown to violet, ca. 60 – 100 μm thick. Ascospores 0 - septate, (7.9 –) 8.6 – 9.9 – 11.2 (– 12.4) × (4.5 –) 4.8 – 5.5 – 6.2 (– 7.0) μm (n = 20).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
7265A0B018825346AC78143B76781C9F.taxon	etymology	Etymology. The name refers to the similarities in morphology and ITS to P. terricola.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
BDE342D3B7B8547D84F9CF3E67DE85D5.taxon	description	Fig. 4 C	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
BDE342D3B7B8547D84F9CF3E67DE85D5.taxon	diagnosis	Diagnosis. Differs from P. borealis and P. pseudocompressa by often smaller more convex apothecia and a smaller thallus.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
BDE342D3B7B8547D84F9CF3E67DE85D5.taxon	description	Description. Thallus white to grey, endolithic to sparse small areoles, 0.2 – 0.5 mm wide, ca. 0 – 0.15 mm thick, K-, C-, UV- to UV + bluish-white. Apothecia orange, 0.2 – 0.6 mm, convex to strongly convex, 1 / 2 - immersed to mainly superficial; ca. 15 – 80 apothecia / cm 2. Epihymenium yellow-brown to dark orange, 12 – 20 μm thick, K + violet. Hymenium 50 – 80 μm thick. Hypothecium colourless to pale yellow, ca. 100 – 200 μm thick. Paraphyses ca. 2 – 2.5 μm thick, apex not thickened to thickened to ca. 3 – 5 μm thick. Ascospores 0 - septate, (8.4 –) 9.8 – 11.4 – 12.9 (– 14.4) × (4.8 –) 5.0 – 5.6 – 6.1 (– 7.1) μm (n = 36).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
BDE342D3B7B8547D84F9CF3E67DE85D5.taxon	etymology	Etymology. The name refers to the large difference in ITS of the species compared to other Protoblastenia species (differs by ca. 15 – 18 % from other species).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
3E73610245705DF6B9E335C87959A1E5.taxon	description	Fig. 4 D	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
3E73610245705DF6B9E335C87959A1E5.taxon	diagnosis	Diagnosis. Differs from P. fennoarctica in always having convex to strongly convex apothecia and from P. saanaensis and P. timdalii in having sparsely occurring apothecia and a thick hypothecium.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
3E73610245705DF6B9E335C87959A1E5.taxon	description	Description. Thallus white, grey to pale brown, rimose to areolate, ca. 0.05 – 0.2 mm thick, K-, C-, UV-, algal cells 5 – 9 μm. Apothecia yellow-orange, 0.3 – 0.8 mm, convex to strongly convex, 1 / 2 - immersed to superficial; ca. 20 – 40 apothecia / cm 2. Epihymenium dirty yellow to orange-yellow, 12 – 18 μm thick, K + violet. Hymenium 50 – 70 μm thick. Hypothecium pale yellow, ca. 80 – 300 μm thick. Paraphyses ca. 2 – 2.5 μm thick, apex slightly thickened to 3 μm thick. Ascospores 0 - septate, (7.4 –) 8.5 – 9.6 – 10.7 (– 12.6) × (4.4 –) 4.7 – 5.1 – 5.5 (– 6.3) μm (n = 52).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
3E73610245705DF6B9E335C87959A1E5.taxon	etymology	Etymology. The name is in honour of Prof Jouko Rikkinen (Helsinki) for his innovative work on various fields of lichenology.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
CE2CF32D1453527DAFB5185219F1D87F.taxon	description	Description. Thallus whitish-grey to rarely pale brown, rimose to predominantly areolate, areoles 0.1 – 0.8 mm, ca. 0.1 – 0.2 mm thick, K-, C-, UV- to UV + bluish-white, algal cells 4 – 12 μm. Apothecia yellow-orange to orange, 0.2 – 0.9 mm, slightly convex to convex, 3 / 4 - immersed in thallus to superficial; ca. 40 – 100 apothecia / cm 2. Epihymenium orange-brown, 12 – 20 μm thick, K + violet. Hymenium 50 – 80 μm thick. Hypothecium pale yellow, ca. 60 – 80 μm thick. Paraphyses ca. 1.5 – 2.5 μm thick, apex not thickened to slightly thickened to 2 – 3 μm thick, sparingly branched and anastomosing. Ascospores 0 - septate, (8.2 –) 9.1 – 10.3 – 11.6 (– 13.0) × (5.2 –) 5.6 – 6.3 – 7.1 (– 7.6) μm (n = 43).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
3817FD07D2215FE9B64B2ABC5DC32B13.taxon	description	Fig. 5 A	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
3817FD07D2215FE9B64B2ABC5DC32B13.taxon	diagnosis	Diagnosis. Differs from P. minuta in apothecia not leaving pits, from P. rikkinenii in having more densely occurring apothecia, from P. fennoarctica in having a thinner hypothecium and from P. timdalii in often having smaller apothecia.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
3817FD07D2215FE9B64B2ABC5DC32B13.taxon	description	Description. Thallus white, grey or pale brown, rimose to areolate, areoles 0.3 – 0.8 mm, ca. 0.03 – 0.1 mm thick, K-, C-, UV-, algal cells 5 – 12 μm. Apothecia yellow to orange-yellow, 0.3 – 0.5 mm, slightly convex to strongly convex, 3 / 4 - immersed to superficial; ca. 20 – 80 apothecia / cm 2. Epihymenium orange-yellow, 12 – 17 μm thick, K + violet. Hymenium 50 – 70 μm thick. Hypothecium pale yellow (some orange-yellow in squash), ca. 40 – 100 μm thick. Paraphyses ca. 2 – 2.5 μm thick, apex not thickened to slightly thickened, branching. Ascospores 0 - septate, (5.4 –) 7.1 – 8.4 – 9.7 (– 11.4) × (3.8 –) 4.3 – 4.8 – 5.4 (– 6.1) μm (n = 47).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
3817FD07D2215FE9B64B2ABC5DC32B13.taxon	etymology	Etymology. The name refers to the Saana fell where both known specimens were collected.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
9F8D532582E8510C819564D63E148805.taxon	description	Description. Thallus white to whitish-grey, rimose to areolate, areoles 0.2 – 0.8 mm, ca. 0.05 – 0.2 mm thick, K-, C-, UV + bluish-white. Apothecia dirty orange to brown-orange (some with an olive tinge), 0.4 – 0.9 mm, strongly convex, superficial, K + violet; ca. 70 – 120 apothecia / cm 2. Epihymenium dark orange-brown, 8 – 15 μm thick, K + violet. Hymenium 60 – 100 μm thick. Hypothecium violet to violet-brown, 70 – 180 μm thick. Paraphyses ca. 2 – 2.5 μm thick, apex not thickened to slightly thickened, sparingly branched and anastomosing. Ascospores 0 - septate, (9.4 –) 9.7 – 10.8 – 11.9 (– 12.4) × (4.7 –) 4.9 – 5.5 – 6.2 (– 7.3) μm (n = 16).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
9DCFD2E05AC45FABB581918161BBE60C.taxon	description	Fig. 5 B	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
9DCFD2E05AC45FABB581918161BBE60C.taxon	diagnosis	Diagnosis. Differs from P. saanaensis in having slightly larger apothecia and spores.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
9DCFD2E05AC45FABB581918161BBE60C.taxon	description	Description. Thallus white, grey or pale brown, endolithic, rimose to areolate, areoles 0.1 – 0.4 mm, ca. 0 – 0.15 mm thick, K-, C-, UV-. Apothecia yellow-orange, 0.3 – 0.8 mm, convex to strongly convex, semi-immersed to superficial; ca. 40 – 60 apothecia / cm 2. Epihymenium brown-yellow to dirty yellow, K + violet. Hymenium 60 – 70 μm thick, pale, partly yellow. Hypothecium colourless to yellow, ca. 60 – 100 μm thick. Paraphyses ca. 2 – 2.5 μm thick, apex not thickened to slightly thickened. Ascospores 0 - septate, (6.8 –) 7.9 – 9.2 – 10.5 (– 12.6) × (3.8 –) 4.2 – 4.8 – 5.5 (– 7.0) μm (n = 46).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
9DCFD2E05AC45FABB581918161BBE60C.taxon	etymology	Etymology. The name is in honour of Prof Einar Timdal (Oslo) for his numerous important contributions to the taxonomy, biogeography and conservation of Fennoscandian lichens, including studies on the related genus Psora and an important technical edition of the Nordic lichen journal Graphis Scripta.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
33C4E5932077503CB3F19712B1F22336.taxon	description	Fig. 5 C	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
33C4E5932077503CB3F19712B1F22336.taxon	diagnosis	Diagnosis. Differs from most Protoblastenia species with violet hypothecium in having a thick hypothecium and from P. westbergii in having less densely occurring apothecia and smaller spores.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
33C4E5932077503CB3F19712B1F22336.taxon	description	Description. Thallus white, grey or pale brown, rimose to areolate, areoles 0.15 – 0.4 mm, ca. 0.01 – 0.15 mm thick, K-, C-, UV-, algal cells 6 – 10 μm. Apothecia orange, 0.3 – 1.0 mm, convex to mainly strongly convex, superficial, high; ca. 20 – 40 apothecia / cm 2, sometimes forming clusters of smaller apothecia on surface of old apothecia. Epihymenium orange-brown, 12 – 14 μm thick, K + violet. Hymenium 60 – 80 μm thick. Hypothecium purple, orange-red to red-violet, ca. 100 – 280 μm thick. Paraphyses ca. 2 – 2.5 (– 3) μm thick, apex not thickened to slightly thickened, often branching. Ascospores 0 - septate, (6.3 –) 7.9 – 9.2 – 10.5 (– 12.7) × (3.7 –) 4.2 – 4.6 – 5.1 (– 5.6) μm (n = 52).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
33C4E5932077503CB3F19712B1F22336.taxon	etymology	Etymology. The name refers to the violet hypothecium of the species.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
A170C9C68A7653FB98BA14A165D0344F.taxon	description	Fig. 5 D	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
A170C9C68A7653FB98BA14A165D0344F.taxon	diagnosis	Diagnosis. Differs from P. dolomitica in having slightly broader spores, darker orange apothecia and a thicker hypothecium.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
A170C9C68A7653FB98BA14A165D0344F.taxon	description	Description. Thallus white to whitish-grey, rimose to areolate, areoles 0.15 – 0.8 mm, ca. 0.05 – 0.3 mm thick, K-, C-, UV- to UV + bluish-white, algal cells 4 – 8 μm, thallus often strongly invaded by cyanobacteria. Apothecia orange to dark brownish-orange, 0.2 – 1.1 mm, slightly convex to convex, 3 / 4 - immersed to superficial, in one specimen with pale margin ca. 30 – 50 μm thick; ca. 40 – 200 apothecia / cm 2. Epihymenium dirty yellow to orange-brown, 10 – 15 μm thick, K + violet. Hymenium 40 – 70 μm thick, often with oil droplets. Hypothecium red-brown to red-violet, ca. 60 – 150 μm thick. Paraphyses ca. 2 – 2.5 μm thick, apex not thickened to slightly thickened to 3 μm thick, some branched and anastomosing. Ascospores 0 - septate, (8.4 –) 10.5 – 12.0 – 13.6 (– 15.0) × (5.0 –) 5.4 – 6.1 – 6.9 (– 7.8) μm (n = 39).	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
A170C9C68A7653FB98BA14A165D0344F.taxon	etymology	Etymology. The name is in honour of Dr Martin Westberg (Uppsala) for his important work on the taxonomy and biogeography of northern European lichens.	en	Pykälä, Juha, Myllys, Leena (2025): Unexpected species richness of the lichen genus Protoblastenia (Lecanorales, Psoraceae) in Finland. MycoKeys 124: 193-226, DOI: 10.3897/mycokeys.124.162802
