Neolamya sp. P5404
Anamorph: not known.
Teleomorph: stomata absent. Ascomata perithecia, 400-500 µm diam., globose to broadly pyriform, scattered, almost completely immersed, becoming partially erumpent and splitting the host thallus irregularly, the ostiolar region shallowly domed with a well-developed clypeus. Clypeus dark brown, with an outer layer composed of ± completely occluded cells and an inner layer of vertically oriented tissue, with pigmented hyphae surrounding the ostiole. Peridium 25-30 µm thick, thicker above, composed of an outer layer of ? angular cells and an inner layer of paler compressed tissue. Interascal tissue of rather sparse unbranched gradually tapering thin-walled paraphyses ca 2 µm diam. within a gelatinous matrix, the upper part of the peridium lined with long upward-pointing hyphae. Asci 115-135 x 22-24 µm, cylindric-clavate, strongly attenuated towards the apex especially when immature, almost sessile, thin-walled, not fissitunicate, without any obvious apical structures, 16- to 32-spored. Ascospores 41-52 (-55) x 3-3.5 µm, narrowly cylindric-fusiform, often somewhat curved, mostly 3-septate, each cell with two large guttulues, hyaline, smooth, without a perispore or appendages.
The material of Neolamya peltigerae examined by Kocourková (2009) had much longer ascospores, almost the same length as the asci; this may therefore represent a different species or is perhaps related to the number of ascospores within the asci.
Species of Spirographa have similar elongate ascospores and some have multispored asci; and although their fruit-bodies are considered to be apothecia, some are almost closed.
On dead and dying thalli of Peltigera spp.
In GBI, reported from a single site in VC1 W Cornwall.