Rinodina boleana
Description : Thallus corticolous, discontinuous, thin to very thin or disappearing, minutely granular, greenish grey to greyish brown, quite often consisting of only some small warts, without a prothallus. Apothecia lecanorine, sessile, scattered to contiguous, in groups of 3–4, frequent, (0.1–)0.2–0.35(–0.4) mm diam.; disc plane to subconvex, dark-brown to black. Thalline margin concolorous with thallus, thin, entire, persistent or excluded at maturity. Parathecium to 15 μm wide, hyaline, to brownish in upper parts. Cortex uniform, 10–15 μm thick, I−. Hymenium colourless to 80 μm tall; epithecium grey-brown, to 10 μm thick. Paraphyses 1–3 μm thick, apices to 5 μm diam. Asci Lecanora -type. Ascospores Pachysporaria -type, with or without a torus, spore ontogeny type B, 12–16(–19) × (5–)6–8 μm. Pycnidia immersed. Conidia bacillar, 5–7 × 1 μm.
Chemistry : TLC−, all reactions negative.
N: South Auckland (Coromandel Peninsula – N of Colville and Coromandel, Aratiatia), Hawke's Bay (Eskdale, Waipawa S of Napier, Mauriceville), Wellington (Titahi Bay, Porirua). S: Nelson (E of Takaka, Motueka, Nelson, Okiwi Bay), Marlborough (Clarence River N of Kaikoura), Canterbury (Waiau, Culverden, Banks Peninsula, Little Akaloa Bay, Arundel, Peel Forest). On bark of native and introduced trees and shrubs (Coprosma, Cytisus scoparius, Liriodendron tulipifera, Lupinus arboreus, Melicytus, Populus, Salix, Sophora) along roadsides and riverbanks. Associating with Caloplaca homologa, Megalaria grossa and Xanthoria parietina. Known also from Spain and Italy (Giralt & Mayrhofer 1991; Giralt 2001; Nimis & Martellos 2003).
?Cosmopolitan
Illustrations : Giralt & Mayrhofer (1991: 436, fig. 1; 437, fig. 2; 1995: 134, fig. 5C); Edler (2002: 35, fig. 6).
Rinodina boleana is characterised by: the corticolous habit; the thin to evanescent thallus; small apothecia; very small ascospores with thick, uniform walls and irregularly rounded lumina (Pachysporaria -type), 12–16(–19) × (5–)6–8 μm; conidia bacillar, 5–7 × 1 μm.
