Flora of New Zealand Series

=Rinodina tibellii H.Mayrhofer, Lichenologist 15 (3): 280 (1983).

Holotype: New Zealand. Northland, Anawhata, on rotten rocks on coastal cliffs, L.M. Cranwell 183 – W.

Rinodina tibellii. Holotype: New Zealand. South I., Canterbury, Banks Peninsula, 8.2 km S of Diamond Harbour, Mt Herbert Forest, 172º45'E, 43º42's, 450–530 m, along stream in mixed hardwood Podocarpus forest, on sandstone outcrops in a pasture, facing NE, 6.xi.1980, L. Tibell 9374 – UPS.

Description : Thallus saxicolous, sordid to pale-grey, rarely brownish, warted, squamulose or subareolate, often together with small, cyanophilic lichens, without a prothallus. Apothecia lecanorine, scattered to contiguous, sessile, to 0.8 mm diam.; disc plane to convex, brown-black. Thalline margin entire or subcrenate, persistent, concolorous with thallus. Parathecium hyaline. Epithecium brownish with a granular-inspersed epipsamma. Hymenium 90–110 μm tall. Paraphyses 1.5 μm thick, apices swollen to 5 μm diam. Hypothecium to 150 μm thick. Asci Lecanora -type. Ascospores Milvina -type (with changeovers to Physcia -type), spore ontogeny type A, torus very well developed in 2 or 3 ranks, 17–23 × 9–12.5 μm, wall finely warted. Pycnidia immersed. Conidia bacillar, 3.5–4 × 1 μm.

Chemistry : TLC−, all reactions negative.

N: Northland (Leigh, Anawhata), Auckland (Papanui Point, Kawakawa Bay), South Auckland (Mt Te Aroha, Raglan, Mt Mauganui), Wellington (Cape Palliser). S: Nelson (Kaiteriteri, Pepin Island), Marlborough (White's Bay, Halfmoon Bay), Canterbury (Godley Head, Lyttelton, Tumbledown Bay Okains Bay Banks Peninsula), Otago (Damper Bay, Wanaka, Otago Peninsula). On coastal rocks. Known also from Juan Fernandez (Kaschik 2006).

Austral

Illustrations : Mayrhofer (1983: 277, fig. 21 – as Rinodina tibellii); Kaschik (2006: 39, fig. 11).

Rinodina cacaotina is characterised by: the saxicolous habit; ascospores of Milvina -type with a very well developed torus in 2 or 3 ranks. Recorded by Zahlbruckner (1941: 377) – as R. exigua f. saxicola [material from Anawhata].