3.2. New Species
Allographa lineatipruinosa Aptroot, sp. nov.
Figure 1.
MycoBank MB 848702
Diagnosis: Corticolous Allographa with white pruina on the labia (farinulenta-morph), hamathecium not inspersed and ascospores were at least 4/ascus, muriform, 68–72 × 13–16 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,544 (holotype: cgms; isotype: abl).
Description: Thallus crustose, continuous, corticate, glossy, pale mineral grey, under 0.1 mm thick, not surrounded by a prothallus. Photobiont trentepohlioid. Ascomata sessile, solitary, linear, wavy, unbranched, 0.3–0.4 mm wide, up to 3 mm long, c. 0.2 mm high, excipulum completely carbonized, not striate, not covered by thallus, disc closed, with white pruina on the labia (farinulenta-morph fide Lücking et al. 2009). Hamathecium not inspersed. Ascospores at least 4/ascus, hyaline, muriform, 68–72 × 13–16 µm, without gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, K–, KC–, P–. TLC: nil.
Etymology: Named after the elongated line of pruina.
Ecology and distribution: On tree bark in primary rainforest; only known from Brazil.
Discussion: This species would key out in the world key to
Graphis [
17] in Group 9 at couplet 26: Labia with a line of white pruina.
Additional specimens examined: BRAZIL. Same details as the types 86,584 and 86,595 (all cgms, abl).
Allographa variopruinata Aptroot, sp. nov.
Figure 2.
MycoBank MB 848704
Diagnosis: Corticolous Allographa with often white pruina on the labia (farinulenta-morph), hamathecium inspersed and ascospores 8/ascus, 7-septate, 22–24 × 5.5–6.5 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,436 (holotype: cgms; isotype: abl).
Description: Thallus crustose, continuous, corticate, dull, whitish grey, up to 0.1 mm thick, not surrounded by a prothallus. Photobiont trentepohlioid. Ascomata erumpent, solitary, linear, wavy, unbranched or sparingly branched, 0.3–0.4 mm wide, up to 4 mm long, c. 0.2 mm high, excipulum completely carbonized, not striate, laterally covered by thallus, disc closed, with white pruina on some labia (similar to farinulenta-morph fide Lücking et al. 2009). Hamathecium inspersed. Ascospores 8/ascus, hyaline, 7-septate, 22–24 × 5.5–6.5 µm, without gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, K+ yellow, KC–, P+ orange. TLC: Stictic acid.
Etymology: Named after the variable pruina.
Ecology and distribution: On tree bark in primary rainforest; only known from Brazil.
Discussion: This species would key out in the world key to
Graphis [
17] in Group 10 at couplet 3: Labia often with white pruina.
Arthonia xanthopycnidiata Aptroot, sp. nov.
Figure 3.
MycoBank MB 848705
Diagnosis: Corticolous Arthonia with pale brown apothecia, ascospores 8/ascus, hyaline, 1-septate, clavate, 9–10.5 × 2.5–3.5 µm, and pycnidia that are UV+ yellow.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on wood in primary rainforest, 16–20 May 2022, A. Aptroot 86,467 (holotype: cgms; isotype: abl).
Description: Thallus crustose, continuous, not corticate, dull, pale whitish grey, under 0.1 mm thick, mostly immersed in the wood, not surrounded by a prothallus. Photobiont trentepohlioid. Ascomata sessile, solitary or in fused rows, superficial on the substratum, round to ellipsoid in outline, 0.2–0.3 mm wide, up to 1.5 mm long, c. 0.1 mm high, disc very pale brown. Epihymenium almost hyaline. Hamathecium not inspersed. Ascospores 8/ascus, hyaline, 1-septate, clavate, 9–10.5 × 2.5–3.5 µm, without gelatinous sheath. Pycnidia superficial on the thallus, whitish, hemispherical, c. 0.1 mm diam. Conidia not observed.
Chemistry: Thallus UV–, C–, K–, KC–, P–; pycnidia UV+ yellow. TLC: Lichexanthone.
Etymology: Named after the yellow UV reaction of only the pycnidia.
Ecology and distribution: On wood in primary rainforest; only known from Brazil.
Discussion: This species is most similar to common pantropical Arthonia antillarum Fée, but differs by the lichexanthone being only present on the pycnidia instead of the thallus.
Astrothelium aurantioseptemseptatum Aptroot, sp. nov.
Figure 4.
MycoBank MB 848706
Diagnosis: Corticolous Astrothelium with thallus orange-green, UV+ orange, ascomata fused, immersed in thallus-covered hemispherical pseudostromata, hamathecium inspersed, and ascospores 7-septate, 40–47 × 14–16 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 87,330 (holotype: cgms; isotype: abl).
Description: Thallus dull to shiny, orange-green, surrounded by a 0.2 mm wide black prothallus line. Ascomata pyriform, 0.3–0.5 mm diam., fully immersed in thallus-covered hemispherical pseudostromata. Ostioles skewed, fused, black, one or two per pseudostroma. Hamathecium inspersed with hyaline oil globules. Ascospores 8/ascus, hyaline, 7-septate, 40–47 × 14–16 µm, long-ellipsoid, lumina diamond-shaped, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV+ orange, C–, P–, K+ red. TLC: An anthraquinone.
Etymology: Named for the orange thallus and the 7-septate ascospores.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key J, couplet 40: Thallus with superficial orange pigment.
Astrothelium bulbosum Aptroot, sp. nov.
Figure 5.
MycoBank MB 848707
Diagnosis: Corticolous Astrothelium with thallus pale metallic green, UV–, pseudostromata mottled whitish and pale brownish, UV+ yellow, ascomata in groups of 10–40 in pseudostromata, ostioles apical, hamathecium not inspersed, and ascospores muriform, 42–47 × 15–16.5 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on Enterolobium tree bark in primary rain-forest, 16–20 May 2022, A. Aptroot 86111 (holotype: cgms; isotype: abl).
Description: Thallus glossy, pale metallic green, not surrounded by a prothallus. Ascomata globose, 0.2–0.4 mm diam., immersed in groups of 10–40 in pseudostromata. Pseudostromata raised, mottled whitish and pale brownish, irregular to somewhat linear or almost reticulate, 1–2 mm wide, up to 6 mm long. Ostioles apical, single, pale brown. Hamathecium not inspersed. Ascospores generally 4/ascus, hyaline, muriform, 42–47 × 15–16.5 µm, long-ellipsoid, without thickened central septum, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, P–, K–; pseudostromata UV+ orange, C–, P–, K+ red. TLC: An anthraquinone.
Etymology: Named for the bulbose pseudostromata.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key L, couplet 16: Pseudostromata with pigment that is not very pronounced but causes a UV+ orange reaction.
Astrothelium coloratum Aptroot, sp. nov.
Figure 6.
MycoBank MB 848708
Diagnosis: Corticolous Astrothelium with thallus pale metallic green, UV+ yellow, ascomata in groups of 2–30 in UV+ yellow and orange pseudostromata with both lichexanthone and anthraquinone, ostioles apical, hamathecium not inspersed, and ascospores muriform, 100–117 × 18–21 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,586 (holotype: cgms; isotype: abl).
Description: Thallus glossy, pale metallic green, surrounded by a c. 0.1 mm wide black prothallus line. Ascomata globose, 0.2–0.4 mm diam., immersed in groups of 2–30 in pseudostromata. Pseudostromata raised, yellow, irregular to somewhat linear or almost reticulate, 1–2 mm wide, up to 4 mm long. Ostioles apical, single, black, surrounded by a c. 0.2 mm wide whitish area. Hamathecium not inspersed. Ascospores generally 4/ascus, hyaline, muriform, 100–117 × 18–21 µm, long-ellipsoid, without thickened central septum, not surrounded by a gelatinous sheath. Pycnidia present in young pseudostromata. Conidia not observed.
Chemistry: Thallus UV+ yellow, C–, P–, K––; pseudostromata UV+ yellow and orange (both anthraquinone and lichexanthone present on the pseudostromata), C–, P–, K+ red. TLC: An anthraquinone and lichexanthone.
Etymology: Named for the various, both in daylight and under UV.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key L, couplet 4: Lichexanthone present on thallus and pseudostromata.
Astrothelium inspersonovemseptatum Aptroot, sp. nov.
Figure 7.
MycoBank MB 848709
Diagnosis: Corticolous Astrothelium with thallus pale olivaceous green, UV–, ascomata immersed in whitish erumpent pseudostromata, ostioles fused, hamathecium inspersed, and ascospores 9-septate, 60–64 × 12–14 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 85,920 (holotype: cgms; isotype: abl).
Description: Thallus shiny, pale olivaceous green, not surrounded by prothallus. Ascomata pyriform, 0.3–0.5 mm diam., fully immersed in mostly thallus-covered erumpent pseudostromata. Pseudostromata whitish. Ostioles skewed, fused, black, four per pseudostroma. Hamathecium inspersed with hyaline oil globules. Ascospores 8/ascus, hyaline, 9-septate, 60–64 × 12–14 µm, long-ellipsoid, lumina diamond-shaped, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, P–, K–. TLC: nil.
Etymology: Named for the inspersed hamathecium and the 9-septate ascospores.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key K, couplet 23: Ascospores 9-septate, ostioles fused, pseudostromata whitish, with 1–4 groups of fused ascomata, sideways covered by thallus.
Astrothelium insulare Aptroot, sp. nov.
Figure 8.
MycoBank MB 848710
Diagnosis: Corticolous Astrothelium with thallus pale metallic green, UV–, ascomata 3 to 10 per pseudostroma, which are whitish and almost flush with the thallus, ostioles skewed, hamathecium inspersed, and ascospores 13–16-septate, 50–56 × 14–16.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,484 (holotype: cgms; isotype: abl).
Description: Thallus shiny, pale metallic green, not surrounded by prothallus. Ascomata pyriform, 0.5–0.8 mm diam., fully immersed inside the bark below the thallus. Pseudostromata almost flush with the thallus, irregularly shaped, whitish, c. 1–2 mm diam. Ostioles skewed, single, pale brown, concave, 3 to 10 per pseudostroma. Hamathecium inspersed with hyaline oil globules. Ascospores 8/ascus, hyaline, 13–16-septate, 50–56 × 14–16 µm, long-ellipsoid, lumina diamond-shaped, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, P–, K–. TLC: nil.
Etymology: Named for the island-shaped pattern formed by the pseudostromata.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key K, couplet 23: Ascospores 13–16-septate, ostioles single, pseudostromata whitish, almost flush with the thallus.
Astrothelium laureroides Aptroot, sp. nov.
Figure 9.
MycoBank MB 848711
Diagnosis: Corticolous Astrothelium with thallus pale olivaceous green, UV–, ascomata in groups of 10–40 in raised brownish, UV+ orange pseudostromata, ostioles apical, hamathecium not inspersed, and ascospores muriform, 75–80 × 15–17 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on Enterolobium tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,116 (holotype: cgms; isotype: abl).
Description: Thallus glossy, pale olivaceous green, not surrounded by prothallus. Ascomata globose, 0.2–0.4 mm diam., immersed in groups of 10–40 in pseudostromata. Pseudostromata raised, brownish, irregular to somewhat linear or almost reticulate, 1–2 mm wide, up to 4 mm long. Ostioles apical, single, black, surrounded by a c. 0.2 mm wide whitish area. Hamathecium not inspersed. Ascospores generally 4/ascus, hyaline, muriform, 75–80 × 15–17 µm, long-ellipsoid, without thickened central septum, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, P–, K–; pseudostromata UV+ orange, C–, P–, K+ red. TLC: An anthraquinone.
Etymology: Named for the similarity to the former genus Laurera.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key L, couplet 20: Pseudostromata raised, brownish, but UV+ orange.
Astrothelium marjoleinae Aptroot, sp. nov.
Figure 10.
MycoBank MB 848712
Diagnosis: Corticolous Astrothelium with thallus orange-green, UV+ orange, ascomata immersed in thallus-covered hemispherical, UV+ orange pseudostromata, ostioles fused, hamathecium inspersed, and ascospores 7–9-septate, 62–67 × 11–13 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,378 (holotype: cgms; isotype: abl).
Description: Thallus dull to shiny, orange-green, not surrounded by prothallus. Ascomata pyriform, 0.3–0.5 mm diam., fully immersed in thallus-covered hemispherical pseudostromata. Ostioles skewed, fused, black, surrounded by a 0.2 mm wide whitish area, 1–3 groups per pseudostroma. Hamathecium inspersed with hyaline oil globules. Ascospores 8/ascus, hyaline, 7–9-septate, 62–67 × 11–13 µm, long-ellipsoid, lumina diamond-shaped, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV+ orange, C–, P–, K+ red; pseudostromata UV+ orange, C–, P–, K+ red. TLC: An anthraquinone.
Etymology: Named for the my wife, whom I married in the week that I described this species.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key J, couplet 40: Thallus and pseudostromata orange-green, ascospores 7–9-septate, 62–67 × 11–13 µm.
Additional material examined. Same details as the type, Aptroot 86,389, 86,411, & 86,418 (all cgms, abl).
Astrothelium meandratum Aptroot, sp. nov.
Figure 11.
MycoBank MB 848713
Diagnosis: Corticolous Astrothelium with thallus pale olivaceous green, UV–, ascomata immersed inside the bark below whitish pseudostromata which are flush with the bark, ostioles fused, hamathecium not inspersed, and ascospores 1/ascus, muriform, 270–305 × 42–46 µm, fusiform, median septum strongly thickened.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on Enterolobium tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,094 (holotype: cgms; isotype: abl).
Description: Thallus shiny, olivaceous green, not surrounded by prothallus. Ascomata pyriform, 0.5–0.8 mm diam., fully immersed inside the bark below the pseudostromata. Pseudostromata almost flush with the thallus, round to lobate following the contours of the ascomata, whitish, c. 1–4 mm diam. Ostioles lateral, 3–10 fused, pale brown, convex, 1 fused group per pseudostroma. Hamathecium not inspersed. Ascospores 1/ascus, hyaline, muriform, 270–305 × 42–46 µm, fusiform, median septum strongly thickened, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, P–, K–. TLC: nil.
Etymology: Named for the meandering outline of the pseudostromata.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key O, couplet 18: Ascospores 270–305 × 42–46 µm.
Astrothelium multireflexum Aptroot, sp. nov.
Figure 12.
MycoBank MB 848715
Diagnosis: Corticolous Astrothelium with thallus pale metallic green, UV–, ascomata in groups of 5–30 in raised, yellow, UV+ orange pseudostromata, ostioles apical, UV+ yellow, hamathecium not inspersed, and ascospores muriform, 65–77 × 12–14 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on Enterolobium tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,112 (holotype: cgms; isotype: abl).
Description: Thallus glossy, pale metallic green, not surrounded by prothallus. Ascomata globose, 0.2–0.4 mm diam., immersed in groups of 5–30 in pseudostromata. Pseudostromata raised, yellow, round to irregular in outline, 1–2 mm wide, up to 4 mm long. Ostioles apical, single, c. 0.2 mm wide, whitish to brown. Hamathecium not inspersed. Ascospores generally 4/ascus, hyaline, muriform, 65–77 × 12–14 µm, long-ellipsoid, without thickened central septum, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, P–, K–; pseudostromata UV+ orange, C–, P–, K+ red; ostioles UV+ yellow. TLC: An anthraquinone and lichexanthone.
Etymology: Named for the various UV-reactions of the different thallus parts.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key L, couplet 4: Lichexanthone only on the ostioles; pseudostromata yellow.
Astrothelium myopicum Aptroot, sp. nov.
Figure 13.
MycoBank MB 848716
Diagnosis: Corticolous Astrothelium with thallus orange-green, UV+ orange, ascomata in laterally thallus-covered hemispherical, UV+ orange pseudostromata which are at the tops flat, brown, and not thallus-covered, ostioles fused, hamathecium inspersed, and ascospores 7–9-septate, 35–45 × 9–10 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on Enterolobium tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,109 (holotype: cgms; isotype: abl).
Description: Thallus dull to shiny, orange-green, not surrounded by prothallus. Ascomata pyriform, 0.3–0.5 mm diam., fully immersed in laterally thallus-covered hemispherical pseudostromata. Pseudostromata at the tops flat, brown, and not thallus-covered. Ostioles skewed, fused, brown, surrounded by a 0.2 mm wide whitish area, 1–3 groups per pseudostroma. Hamathecium inspersed with hyaline oil globules. Ascospores 8/ascus, hyaline, 7–9-septate, 35–45 × 9–10 µm, long-ellipsoid, lumina diamond-shaped, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV+ orange, C–, P–, K+ red; pseudostromata UV+ orange, C–, P–, K+ red. TLC: An anthraquinone.
Etymology: Named for the ostioles that give the impression of myopic eyes.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key J, couplet 40: Thallus and pseudostromata orange-green, ascospores 7–9-septate, 35–45 × 9–10 µm.
Astrothelium parabathelium Aptroot, sp. nov.
Figure 14.
MycoBank MB 848717
Diagnosis: Corticolous Astrothelium with thallus olivaceous green, UV+ yellow, ascomata in groups of c. 3–40 in brownish, UV-pseudostromata, ostioles apical, UV+ yellow, hamathecium not inspersed, and ascospores muriform, 115–130 × 18–21 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,535 (holotype: cgms; isotype: abl).
Description: Thallus glossy, olivaceous green, not surrounded by prothallus. Ascomata globose, 0.2–0.4 mm diam., immersed in groups of c. 3–40 in pseudostromata. Pseudostromata raised, brownish, irregular to somewhat linear or almost reticulate, 1–2 mm wide, up to 4 mm long. Ostioles apical, whitish to pale or dark brown to black, convex, c. 0.1 mm wide. Hamathecium not inspersed. Ascospores generally 4/ascus, hyaline, muriform, 115–130 × 18–21 µm, long-ellipsoid, without thickened central septum, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV+ yellow, C–, P–, K–; pseudostromata UV–, C–, P–, K–; ostioles UV+ yellow. TLC: Lichexanthone.
Etymology: Named for the similarity to Bathelium.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key L, couplet 13: Pseudostromata brown, superficial; thallus and ostioles UV+ yellow.
Astrothelium stellare Aptroot, sp. nov.
Figure 15.
MycoBank MB 848718
Diagnosis: Corticolous Astrothelium with thallus olivaceous green, UV–, ascomata in groups of c. 3–40 in raised, brown to whitish, UV– pseudostromata, ostioles apical, UV+ yellow, hamathecium not inspersed, and ascospores muriform, 120–140 × 23–27 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on Enterolobium tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,110 (holotype: cgms; isotype: abl).
Description: Thallus glossy, olivaceous green, not surrounded by prothallus. Ascomata globose, 0.2–0.4 mm diam., immersed in groups of c. 3–40 in pseudostromata. Pseudostromata raised, brown to whitish, often mottled, occasionally with patches of thallus cover, round to lobate to irregular to somewhat linear or almost reticulate, 1–2 mm wide, up to 4 mm long. Ostioles apical, single, whitish to pale or dark brown, convex, c. 0.1 mm wide. Hamathecium not inspersed. Ascospores generally 4/ascus, hyaline, muriform, 120–140 × 23–27 µm, long-ellipsoid, IKI+ blue, without thickened central septum, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus and pseudostromata UV–, C–, P–, K–; ostioles UV+ yellow, C–, P–, K–. TLC: Lichexanthone.
Etymology: Named for the brilliantly UV+ yellow ostioles that evoke a starry night.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key L, couplet 13: Pseudostromata brown, superficial; only ostioles UV+ yellow.
Additional material examined. Same as the type, Aptroot 86,113, 86,129, 86,338, and 86,343; Mato Grosso: Reserva Cristalino, alt. 250–350 m, on tree bark in primary rainforest, 22–29 April 2021, Aptroot 84,061, 84,065 (all cgms, abl).
Astrothelium suprainspersum Aptroot, sp. nov.
Figure 16.
MycoBank MB 848719
Diagnosis: Corticolous Astrothelium with thallus pale olivaceous green, UV+ yellow, ascomata in groups of c. 3–20 in raised, dark brown to black, UV+ yellow pseudostromata with thin to thick whitish, often mottled, pruina, ostioles apical, hamathecium inspersed, and ascospores 3-septate, 18–21 × 6–7.5 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,416 (holotype: cgms; isotype: abl).
Description: Thallus glossy, pale olivaceous green, with thin to thick whitish, often mottled, pruina, not surrounded by prothallus. Ascomata globose, 0.2–0.4 mm diam., immersed in groups of c. 3–20 in pseudostromata. Pseudostromata raised, dark brown to to black but with thin to thick whitish, often mottled, pruina, round to lobate to irregular to somewhat linear or almost reticulate, 0.7–1.3 mm wide, up to 3 mm long. Ostioles apical, single, brown, concave, c. 0.1 mm wide. Hamathecium inspersed with hyaline oil droplets, but only in the upper half. Ascospores 8/ascus, hyaline, 3-septate, 18–21 × 6–7.5 µm, long-ellipsoid, lumina diamond-shaped, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV+ yellow, C–, P–, K–; pseudostromata UV+ yellow, C–, P–, K–. TLC: Lichexanthone.
Etymology: Named for the inspersion in the upper half of the hamathecium.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key H, couplet 7: Hamathecium inspersed with hyaline oil droplets, but only in the upper half, ascospores 18–21 × 6–7.5 µm.
Astrothelium xanthocavatum Aptroot, sp. nov.
Figure 17.
MycoBank MB 848720
Diagnosis: Corticolous Astrothelium with thallus pale olivaceous brown, UV–, ascomata in groups of 1–10 in whitish, partly UV+ yellow pseudostramata that are almost flush with the thallus, ostioles apical, hamathecium not inspersed, and ascospores 1/ascus, hyaline, muriform, 140–175 × 21–24 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,551 (holotype: cgms; isotype: abl).
Description: Thallus shiny, pale olivaceous brown, not surrounded by prothallus. Ascomata pyriform, 0.4–0.8 mm diam., mostly immersed inside the bark below the thallus, but usually some black parts exposed. Pseudostromata almost flush with the thallus, round to lobate to somewhat irregularly linear, whitish, c. 1–2 mm wide, up to 3 mm long, containing 1–10 ascomata. Ostioles apical, black, c. 0.1 mm diam. Hamathecium not inspersed. Ascospores 1/ascus, hyaline, muriform, 140–175 × 21–24 µm, long ellipsoid, without thickened median septum, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, P–, K–; pseudostromata partly UV+ yellow, C–, P–, K–. TLC: Lichexanthone.
Etymology: Named for the yellow UV reaction and the cavate ascomata.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key L, couplet 13: Pseudostromata almost flush with the thallus, whitish, with UV+ yellow patches, ascospores 140–175 × 21–24 µm.
Ocellularia fuscolichexanthonica Aptroot, sp. nov.
Figure 18.
MycoBank MB 848721
Diagnosis: Corticolous Ocellularia with thallus medulla UV+ white, cortex UV+ yellow, columella isodiametric, c. 0.1 mm wide, surface white, internally brown, excipulum with brown ring-shaped tips, hamathecium not inspersed, ascospores brown, 3-septate, ellipsoid, 18–21 × 7.5–8.5 µm
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,492 (holotype: cgms; isotype: abl).
Description: Thallus crustose, continuous, corticate, somewhat shiny, pale whitish grey, up to 0.3 mm thick, not surrounded by a prothallus. Photobiont trentepohlioid. Ascomata immersed in the thallus, solitary, round, 0.3–0.4 mm diam., disc brown-black, white pruinose, columella isodiametric, c. 0.1 mm wide, surface white, internally brown. Excipulum with brown ring-shaped tips. Hamathecium not inspersed. Ascospores 8/ascus, brown, 3-septate, ellipsoid, 18–21 × 7.5–8.5 µm, without gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus medulla UV+ white, C–, K–, KC–, P–; thallus cortex UV+ yellow, C–, K–, KC–, P–. TLC: Lichexanthone and hypothamnolic acid.
Etymology: Named after the brown ascospores and the thallus with lichexanthone.
Ecology and distribution: On tree bark in primary rainforest; only known from Brazil.
Discussion: This species differs from all known species in the genus (and in the family) due to the combination of 3-septate brown ascospores, lichexanthone in the thallus, and the presence of a columella that is brown inside.
Ocellularia lichexanthocavata Aptroot, sp. nov.
Figure 19.
MycoBank MB 848722
Diagnosis: Corticolous Ocellularia with thallus UV+ yellow, columella isodiametric, c. 0.1 mm wide, surface and internally black, margin of thallus color, medulla with copious orange-yellow crystals, excipulum with black ring-shaped tips, hamathecium not inspersed, ascospores hyaline, 5-septate, long ellipsoid, 18–21 × 5.5–6.5 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,424 (holotype: cgms; isotype: abl).
Description: Thallus crustose, continuous, slightly verrucose, corticate, somewhat shiny, pale whitish grey, up to 0.1 mm thick, surrounded by a black prothallus line. Photobiont trentepohlioid. Ascomata erumpent from the thallus, solitary, round, 0.3–0.5 mm diam., disc black, not pruinose, columella isodiametric, c. 0.1 mm wide, surface and internally black, margin of thallus color, medulla with copious orange-yellow crystals. Excipulum with black ring-shaped tips. Hamathecium not inspersed. Ascospores 8/ascus, hyaline, 5-septate, long ellipsoid, 18–21 × 5.5–6.5 µm, without gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV+ yellow, C–, K+ red, KC–, P–. TLC: Lichexanthone and an orange-(Ach.) Müll. Arg.
Etymology: Named after the thallus with lichexanthone and similarity to O. cavata (Ach.) Müll. Arg.
Ecology and distribution: On tree bark in primary rainforest; only known from Brazil.
Discussion: This species is very similar to the type of the genus O. cavata, but it has lichexanthone in the thallus.
Pertusaria amazonica Aptroot, sp. nov.
Figure 20.
MycoBank MB 848723
Diagnosis: Saxicolous Pertusaria with thallus medulla UV+ white, cortex UV+ yellow, with isidia of thallus color but with black tips, sparsely dichotomously branched, c. 0.3 mm wide, up to 1.3 mm long, hamathecium not inspersed, ascomata globose, c. 0.4 mm diam., 2–8 immersed in sessile warts of thallus color that are constricted at the base, 1–2 mm diam., ascospores 8/ascus but usually four ascospores maturating, hyaline, ellipsoid, 75–97 × 32–40 µm, wall c. 8 µm wide, smooth.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on siliceous rock along the river in primary rainforest, 16–20 May 2022, A. Aptroot 86,458 (holotype: cgms; isotype: abl).
Description: Thallus crustose, continuous, corticate, dull, metallic grey, up to 0.3 mm thick, up to 1 m diam., not surrounded by a c. 2–5 mm wide, zonated prothallus. Isidia sparse or copious, of thallus color but with black tips, sparsely dichotomously branched, c. 0.3 mm wide, up to 1.3 mm long. Photobiont trebouxioid. Ascomata globose, c. 0.4 mm diam., 2–8 immersed in sessile warts of thallus color that are constricted at the base, 1–2 mm diam. And c. 1 mm high. Ostioles concave, grey, c. 0.2 mm diam. Hamathecium not inspersed. Ascospores 8/ascus but usually four ascospores maturating, hyaline, ellipsoid, 75–97 × 32–40 µm, wall c. 8 µm wide, smooth. Pycnidia not observed.
Chemistry: Thallus medulla UV+ white, C–, K–, KC–, P–; thallus cortex UV+ yellow, C–, K–, KC–, P–. TLC: Lichexanthone and divaricatic acid aggregate.
Etymology: Named after the small muriform ascospores.
Ecology and distribution: On tree bark in primary rainforest; only known from Brazil.
Discussion: This species would key out in the world key [
19] in Group 21 at couplet 4: Thallus with isidia, with divaricatic acid.
Pertusaria species are very scarce in the Amazon, just like
Lecanora and in general all lichens with trebouxioid algae. This species is locally very abundant, covering many complete rockfaces. The new species is markedly different from any described species due to the presence of isidia and the chemistry of lichexanthone and divaricatic acid. Over 100 species of
Pertusaria are already described or reported from Brazil, but a preliminary analysis of our recently collected specimens suggests that at least 200 species probably occur there.
Additional specimens examined: Same details as the type, Aptroot 86,452, 8457, 86,521, 86,531, 86,441, 86,445, 86,459, 87,342, and 87,347 (all cgms; abl).
Phaeographis xantholirellinata Aptroot, sp. nov.
Figure 21.
MycoBank MB 848724
Diagnosis: Corticolous Phaeographis with thallus UV– and K–, lirellae deeply crenately furrowed, UV+ yellow, hamathecium not inspersed; ascospores brown, 3-septate, clavate, 19–20 × 7–8 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,349 (holotype: cgms; isotype: abl).
Description: Thallus crustose, continuous, corticate, glossy, pale greenish grey, up to 0.1 mm thick, not surrounded by a prothallus. Photobiont trentepohlioid. Ascomata erumpent, linear, wavy and branched in outline, 0.25–0.35 mm wide, up to 7 mm long, c. 0.2 mm high, disc grey (pruinose?), margin raised much above the disc, cream white, deeply crenately furrowed, c. 0.1 mm wide. Excipulum and hypothecium not carbonized. Epihymenium pale brown. Hamathecium not inspersed. Ascospores 8/ascus, brown, 3-septate, clavate, 19–20 × 7–8 µm, without gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, K–, KC–, P–; lirellae UV+ yellow, C–, K–, KC–, P–. TLC: Lichexanthone.
Etymology: Named after the lirellae that are UV+ yellow.
Ecology and distribution: On tree bark in primary rainforest; only known from Brazil.
Discussion: This species differs from all known species in the genus (and family) by the yellow reflecting crenate lirellae.
Porina ramiisidiata Aptroot, sp. nov.
Figure 22.
MycoBank MB 848725
Diagnosis: Corticolous Porina with thallus ochraceous green, with isidia in irregular groups, cylindrical, irregularly branched, c. 0.1 mm wide and up to 0.8 mm long, often ending in white prothallus filaments.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,322 (holotype: cgms; isotype: abl).
Description: Thallus glossy, olivaceous green, up to 7 cm diam., surrounded by a whitish prothallus line. Isidia in irregular groups, cylindrical, irregularly branched, c. 0.1 mm wide and up to 0.8 mm long, often ending in white prothallus filaments. Ascomata and pycnidia not observed.
Chemistry: Thallus UV–, C–, K–, KC–, P–. TLC: nil.
Etymology: Named for the branched isidia.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species was sterile, but sequence data showed that it is (indeed) a Porina. It differs from all other isidiate species so far described in the irregularly branched isidia that often end in white prothallus.
Pseudopyrenula connexa Aptroot, sp. nov.
Figure 23.
MycoBank MB 848726
Diagnosis: Corticolous Pseudopyrenula with thallus pale ochraceous white, UV–, ascomata 1–8 immersed in carbonized pseudostroma, ostioles fused, hamathecium inspersed, and ascospores 3-septate, 24–25.5 × 6.5–7.5 µm.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 85,964 (holotype: cgms; isotype: abl).
Description: Thallus dull, not corticate, pale ochraceous white, not surrounded by a prothallus. Ascomata pyriform, 0.2–0.4 mm diam., 1–8 immersed in carbonized pseudostroma. Ostioles skewed, fused, black. Hamathecium inspersed with hyaline oil globules. Ascospores 8/ascus, hyaline, 3-septate, 24–25.5 × 6.5–7.5 µm, long-ellipsoid, lumina diamond-shaped, not surrounded by a gelatinous sheath. Pycnidia not observed.
Chemistry: Thallus UV–, C–, K–, KC–, P–. TLC: nil.
Etymology: Named for the connected ostioles.
Ecology and distribution: On tree bark in rainforest; only known from Brazil.
Discussion: This species would key out as follows in the world key [
18]: key Y, couplet 18: Ostioles skewed, fused.
Sprucidea squamulosa Aptroot, sp. nov.
Figure 24.
MycoBank MB 848728
Diagnosis: Corticolous Sprucidea with thallus with norsoloronic acid, microsquamulose on a continuous black hypothallus, consisting of a 0.1–0.4 mm thick layer of squamules, greyish green mottled with bright brick red patches, surrounded by a black prothallus line, which is a continuation of the hypothallus. Squamules greatly dissected into lobules of c. 0.03 mm wide, flattened, at the margin, often fragmenting into small propagules.
Type: BRAZIL. Amazonas: Novo Aripuanã, Pousada Rio Roosevelt, alt. 100 m, 8°29′ S, 60°58′ W, on Enterolobium tree bark in primary rainforest, 16–20 May 2022, A. Aptroot 86,075 (holotype: cgms; isotype: abl).
Description: Thallus microsquamulose on a continuous black hypothallus, consisting of a 0.1–0.4 mm thick layer of squamules, greyish green mottled with bright brick red patches, surrounded by a black prothallus line, which is a continuation of the hypothallus. Squamules greatly dissected into lobules of c. 0.03 mm wide, flattened, at the margin often fragmenting into small propagules. Photobiont trebouxioid. Ascomata and pycnidia not observed.
Chemistry: Thallus UV–, C–, K+ purple, KC–, P–. TLC: Norsoloronic acid.
Etymology: Named after the squamules.
Ecology and distribution: On tree bark in primary rainforest; only known from Brazil.
Discussion: This species would key out in the world key [
20] at couplet 2: Thallus microsquamulose.