Gyalidea hensseniae
Description : Thallus crustose, moderately thick, cracked–areolate, greyish white, becoming grey-green when moist. Apothecia rounded, solitary to 2–3-confluent, and becoming deformed through mutual pressure, gyalectoid at first becoming ±plane, 0.3–0.4 mm diam., to 0.1 mm tall, constricted at base to broadly adnate to semi-immersed in thallus, disc pale yellow-brown, translucent when moist. Exciple hyaline 40–60 μm thick. Hypothecium paraplectenchymatous. Hymenium 65–75 μm tall, colourless; paraphyses simple, 1 μm diam, apices slightly swollen. Asci cylindrical–clavate, 8-spored. Ascospores ellipsoidal, muriform, constricted at septa, 20–24 × 8–10 μm.
?S: Known also from Australia (McCarthy 2003c, 2006).
Australasian
Illustration : Poelt & Vězda (1990: 53, fig. 2).
Gyalidea hensseniae is characterised by: the saxicolous habit; the grey-white to grey-green, areolate thallus; the small scattered, yellow-brown apothecia; the colourless exciple and hypothecium; and muriform ascospores, 20–24 × 8–10 μm.
