Lauderlindsaya borreri
≡*Sphaeria borreri Tul., Annls Sci. nat. Bot., sér. 3, 17: 128 (1852).
Description : Lichenicolous, occurring on Normandina pulchella or on free-living chlorococcoid algae, not forming an independent thallus. Perithecia solitary, immersed in host, protruding through underside of host squamules or not on a distinct thallus and surrounded by an algal mass; black, matt, with a distinct apical ostiole, entire, globose at base, becoming conical at apex. Peridium textura angularis with fairly elongated cells comprising 10–15 cell layers, 30–45(–55) μm thick, the outer cells with densely pigmented walls, inner layers ±hyaline, (160–)200–300(–350) × (150–)170–250(–330) μm diam. Centrum I+ red-brown. Hamathecium lacking interascal filaments, periphyses well-developed at ostiole, septate, branched or unbranched. Asci clavate to broadly clavate, shortly stalked, with delicate walls, ascus apex without any apparatus but clearly showing the 2-layered nature of the wall, I−, 85–95(–115) × (15–)17–23 μm. Ascospores elongate–ellipsoidal, apices pointed, (5–)7-septate to submuriform, colourless, becoming brown with age (after discharge from asci), constricted at septa at maturity, smooth-walled, 25–35(–45) × 6–9 μm.
S:? Known also from Great Britain, Europe, Madeira, the Canary Is, the Philippines, Australia, North America, and Chile (David & Hawksworth 1989; McCune 1997; Hafellner et al. 2002).
Cosmopolitan
Host : Normandina pulchella.
Illustrations : David & Hawksworth (1989; 111, fig. 1; 113, pl. 1; 115, pl. 2; 117, pl. 3); Diederich & Sérusiaux (1993: 98, fig. 8).
* Lauderlindsaya borreri is characterised by: the lichenicolous habit with Normandina pulchella as host; immersed black perithecia; transversely septate to submuriform ascospores, colourless to brownish, constricted at septa, 25–35(–45) × 6–9 μm.
