Porina undefined-1

Porina sp. 1, 2, 3, 4, & 5 Notes. The material assigned to Porina sp. 1 –5 lacked hymenial structures and ascospores in the examined perithecia, preventing assessment of important diagnostic characters. Moreover, the available morphological characters did not allow confident assignment to the closest named taxa. The five specimens are therefore retained as unnamed, distinct taxa. Porina sp. 1 –4 were placed within the Phylloporina clade, whereas the bambusicolous Porina sp. 5 was placed within the Phragmopeltheca clade. Porina sp. 1 differs from the closely related P. aff. lucida 1 in perithecial morphology. Its perithecia are lens-shaped to hemispherical (0.3–0.45 mm; n = 11), with a convex apex, whereas those of P. aff. lucida 1 are hemispherical to conical (0.4–0.8 mm; n = 45), with an apex ranging from slightly convex to distinctly applanate and darker in colour. Porina sp. 2 is characterised by a smooth, continuous thallus and pale green, lens-shaped to hemispherical perithecia (0.4–0.5 mm; n = 7), with an orange to reddish tinge around the ostiole. Although Porina sp. 3 and sp. 4 showed little genetic divergence in the mtSSU phylogeny, they were provisionally treated as separate taxa from one another and from P. aff. subepiphylla 2 based on differences in external morphology. Porina sp. 3 has a slightly rough, dispersed thallus and orange-green, lens-shaped to hemispherical perithecia (0.25–0.4 mm; n = 14) that are distinctly spaced apart. In contrast, Porina sp. 4 has a smooth, continuous thallus and yellowish-green, lens-shaped perithecia (0.3–0.5 mm; n = 21) that are irregularly distributed, closely spaced, and sometimes form nearly contiguous clusters. The bambusicolous specimen designated Porina sp. 5 was included because of its placement within the Phragmopeltheca clade in the ITS phylogeny. Although bamboo culms can provide ecological conditions comparable to leaf surfaces (Santesson 1952), bambusicolous material was treated as a distinct substrate in this study. The specimen has a yellowish-green, smooth to slightly rough thallus and dark red to blackish-red, lens-shaped perithecia (0.15–0.25 mm; n = 9). Specimens examined. MADAGASCAR – Diego Suarez Prov. • Antsiranana, West of Sambava, Marojejy National Park, Camp Mantella area, trail to Cascade de Humbert, through rather dense humid evergreen lower montane forest, stream bank at waterfall of large exposed bedrock area, 14°25'58"S, 49°46'22"E, alt. ca. 480 m, on bamboo culm, 18 Oct. 2014; Ertz 19816 B as “ Porina sp. 5 ” (BR, TAN). • ibid., trail from Park entrance to Camp Mantella, rather dense humid evergreen lower montane forest, 14°26'48"S, 49°47'06"E, alt. 360 m, 17 Oct. 2014; Ertz 20275 C as “ Porina sp. 3 ” (BR, TAN). • ibid., along trail from Camp Simpona down to Camp Marojejia, rather dense humid montane forest, 14°26'20"S, 49°45'08"E, alt. ca. 1200 m, 23 Oct. 2014; Ertz 20279 I as “ Porina sp. 2 ” (BR, TAN). – Toliara Prov. • ca. 26 km Northwest of Fort-Dauphin (Tolagnaro), National Park of Andohahela, South part of parcel 1, ca. 6.5 km West of the village of Malio, 24°56'24.1"S, 46°43'26.2"E, alt. 1000 m, dense humid forest, 01 Dec. 2019; Ertz 25411 D as “ Porina sp. 4 ”, 25411 E as “ Porina sp. 1 ” (BR, TAN).