Lautitia danica  

Anamorph: an unnamed spermatial morph (Schatz, 1984; Wilson & Knoyle, 1961). Conidiomata 100-200 µm diam, globose to flask-shaped, immersed in host tissues, with a thin wall composed of intertwined hyphae. Conidiophores absent. Conidiogenous cells formed directly from the inner wall tissues, 16-18 x 2-3 µm, cylindrical and sometimes slightly tapering, proliferating percurrently, periclinal thickening sometimes visible, collarettes absent. Conidia ca 4 x 1 µm, cylindrical, hyaline, thin-walled, aseptate, smooth, without mucous appendages or sheath, sometimes appearing catenate.
Teleomorph: ascostromata perithecial, 180-270 µm diam, subglobose to flask-shaped, fairly long-necked, immersed within algal tissues and visible from the surface only as small black spots caused by melanization of the host tissues above the ascomata. Peridium thin-walled, hyaline or pale brown, composed of several layers of interwoven thick-walled hyphae. Interascal tissue composed of copious narrow cellular pseudoparaphyses. Asci 83-94 x 12-14 µm, cylindrical to cylindric-clavate, fairly short-stalked, thick-walled and fissitunicate, the apex rounded with an ocular chamber, 8-spored. Ascospores arranged biseriately, 33-40 x 4-7 µm, with one slightly submedian septum, the upper cell swollen towards the base and acute-ended, the lower cell cylindrical with a rounded base, thin-walled, hyaline but apparently sometimes becoming pale yellow, smooth-walled, without mucous appendages or sheath.