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Lichens Pan-Z (2007) - Flora of New Zealand Lichens - Revised Second Edition Pan-Z
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Thelidium calcareum

T. calcareum (C.Knight) Hellb., Bihang K. Sv. Vet.-Akad. Handl. 21 (3/13): 136 (1896).

≡Verrucaria calcarea C.Knight, Trans. N. Z. Inst. 15: 356 (1883).

=Verrucaria calcicola Nyl., Lich. Nov. Zel.: 127 (1888).

Holotype: New Zealand. Sine loco. Charles Knight – WELT. Isotypes – BM, H-NYL 2107 (see below), H.-NYL 2092.

Verrucaria calcicola. Type: "Nova Zelandia" [New Zealand]. Sine loco (probably Wellington), 1882, [Charles] Knight – H-NYL 2107 – holotype [labelled by Knight "V. calcarea Knight", and annotated with Nylander's drawing of 1-septate spores "0.014–18, 0.007–8" (Dr Orvo Vitikainen, pers. comm.)].

Description : Flora (1985: 570).

N: South Auckland (Pio Pio) to Wellington. S: Canterbury (Weka Pass, Castle Hill, Mt Somers), Otago (Maheno, Oamaru), Southland (Castle Rock, Clifden). On limestone rocks, often giving a rather greyish colour to stone – widespread.

Endemic

Illustration : Knight (1883: pl. XXXVI, fig. 11 – as Verrucaria calcarea).

Thelidium calcareum is characterised by: the saxicolous habit (basicolous rocks); the olivaceous to blackish brown, rather effuse or abraded thallus; minute, black perithecia; and 1-septate ascospores, 14–18 × 7–9 μm.

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