Flora of New Zealand Series

≡Verrucaria epidermidis var. gemellipara C.Knight, Trans. Linn. Soc. 23: 99 (1860).

≡Verrucaria gemellipara (C.Knight) C.Knight, Trans. N. Z. Inst. 8: 323 (1876).

=Verrucaria circumpressa Nyl., Lich. Nov. Zel.: 133 (1888).

Lectotype: New Zealand. Sine loco [probably Auckland]. Charles Knight – BM [fide Galloway (1985a: 15)].

Verrucaria circumpressa. Holotype: New Zealand. Sine loco [probably Wellington], Charles Knight – H-NYL 855.

Description : Flora (1985: 15).

N: Known only from the type collections.

Endemic

Illustrations : Knight (1860: pl. XI, fig. 3 – as Verrucaria epidermidis var. gemellipara; 1876: pl. X, fig. 19; 1877: pl. XXXVII, fig. 20 – as Verrucaria gemellipara).

Arthopyrenia gemellipara is characterised by: the corticolous habit; yellow-brown, glossy or matt, mosiac-forming thallus delimited by a prominent, irregular, black prothallus; frequent, scattered, rounded to oval or irregular, hemispherical, black perithecia, often clustered; 1-septate ascospores, constricted at septum, 15–18 × 6–7 μm.