A Lichenological Legacy – Festschrift Thomas H

19. Phyllopsora leucophyllina (Nyl.) Timdal
The Lichenologist 40: 352 (2008). – Lecidea leucophyllina Nyl., Annls Sci. Nat., Bot., sér. 4, 19:
347 (1863). – Type: CUBA (see TIMDAL 2008b). – Description: TIMDAL (2008b).
Chemistry: homosekikaic acid (major) and sekikaic acid (submajor).
Notes: The species is known from a few collections from Cuba, Guyana and Peru
(TIMDAL 2008b).
Specimens examined: CUBA. s. loc., Wright s.n. (H-NYL 17345c & e, holotype); s. loc., Wright,
Lich. Cub. 213 (BM, UPS).
20. Phyllopsora longiuscula (Nyl.) Zahlbr.
Catal. Lich. Univers. 4 (25): 398 (1926). – Lecidea longiuscula Nyl., Annls Sci. Nat., Bot., sér. 4,
19: 339 (1863). – Type: CUBA (see SWINSCOW & KROG 1981). – Description: BRAKO (1991).
(Colour Plate 15B)
Chemistry: no lichen substances (by TLC).
Notes: The species is characterized by the reddish brown prothallus, the more or
less continuous crust of small (0.1–0.3 mm) isodiametrical areolae from which
develop scattered, ascending, elongated squamules, the medium brown apothecia,
the yellowish brown (K–) hypothecium, the large ascospores (12.5–17.5 × 3–4
μm, n = 20, from two collections), and the absence of lichen substances. BRAKO
(1991) regarded the ascending squamules as isidia and discussed the species’
delimitation against the isidiate P. intermediella. I regard the squamules as
lacinules, and find sterile material difficult to distinguish especially from P.
chlorophaea, see that species for discussion.
Phyllopsora longiuscula is known from few collections. Only Wright’s
material from Cuba and Imshaug 32292 from Trinidad are fertile and the basis for
the spore measurements given above. In addition to the West Indian material, the
species is known from Venezuela (BRAKO 1991). New to Trinidad and Tobago.
Specimens examined: CUBA. Wright s.n. (H-NYL 20537, holotype, TLC not performed), Wright
Lich. Cub. 179[a] (BM, UPS), Ser. 2, 121 (H-NYL 20535, TLC not performed), Wright s.n. (BM).
PUERTO RICO. Britton et al. 4509 (NY). TRINIDAD & TOBAGO. Imshaug & Imshaug 31363, 31528,
31606, 32292 (MSC), Rui & Timdal 10730, 10800, 10865 (O).
21. Phyllopsora microphyllina (Nyl.) Swinscow & Krog
The Lichenologist 13: 243 (1981). – Lecidea microphyllina Nyl., Annls Sci. Nat., Bot., sér. 4, 19:
347 (1863). – Type: CUBA, “in ins. Cuba”, C. Wright s.n. (H-NYL 17345a, holotype) [too scanty
for TLC].
(Colour Plate 15C)
Description: Prothallus indistinct. Thallus effuse, squamulose, without radiating
marginal squamules. Squamules medium sized, up to 0.5 mm wide, mostly
adnate, isodiametrical to elongated, plane to weakly convex, crenulate to lobed,
geotropically arranged; upper side brownish green (old herbarium material),
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