Keissleriella culmifida, Keissleriella culmifida
Anamorph: linked with Pseudoseptoria donacis (Pass.) Sutton (as Septoria oxyspora Penz. & Sacc.) by Grove (1935), but the connection is only based on juxtaposition of fruit-bodies.
Teleomorph: Ascostromata perithecial, 200-250 µm diam., globose to pyriform, papillate, subepidermal with just the papilla erumpent, clypeate. Peridium 10-16 µm thick, composed of compressed cells, abruptly becoming rounded adjacent to the papilla and extending into the epidermis as a clypeus, papilla composed of ± upright to convergent red-brown setae 25-60 x 4-6 µm. Interascal tissue of pseudoparaphyses 1-2 µm in diam. Asci 76-102 x 15-17 µm, cylindric-clavate, short-stalked, thick-walled and fissitunicate, 8-spored. Ascospores arranged biseriately, 20-26 x 7-9 µm, narrowly ellipsoidal, hyaline, 3-septate, the cell above the primary septum hardly swollen, often with a gelatinous layer present that is prominent along the sides but not at the ends.
Not formally assessed, but would almost certainly be considered as Data Deficient. The rather small number of GB&I records (25 in FRDBI) is probably due mostly to the inconspicuous nature of the species and the paucity of expert collectors.
In GB&I, found growing on dead culms and leaves of a range of grass species, including Ammophila arenaria, Arrhenatherum elatius, Dactylis glomerata, Elytrigia atherica, E. juncea, Leymus arenarius and Triticum sp. Also reported on Typha latifolia. It is assumed to be a saprobe.
In GB&I, Scattered throughout England (particularly E and NE England; S Devon, Durham, W Gloucestershire, Huntingdonshire, N Lincolnshire, Northamptonshire, Suffolk, Surrey, NW Yorkshire, NE Yorkshire, SE Yorkshire), Scotland (Kintyre, W Ross, Orkney) and Channel Is (Herm). Also known from various European countries including Czech Republic, Finland and Switzerland.