Pyrenomycetes Species Page
Cuspidatospora xiphiago
Small separate ascomata didymospore |
Shearer & Bartolata Cuspidatispora xiphiago Shearer & Bartolata, in Miller, Shearer, Bartolata & Huhndorf, Mycoscience 47(4): 220 (2006) |
Sordariomycetidae Sordariales |
Figure from CAS184-1 | Type Specimen: USA. Illinois. Vermilion County, Jordan Creek, 40°49'50"N, 87°49'50"W, 14 Mar 1994, C.A. Shearer, A184-1 (Holotype in ILL; isotype as I |
Material Examined: CAS184-1 (HOLOTYPE) |
Genbank Accession: DQ376251.1 (LSU), DQ376252.1 (B-tub) |
Complete Description |
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Ascomata ovoid, papillate, 300–400 µm high, 250–300 µm diam, numerous, scattered to gregarious, erumpent to superficial, covered with villose hairs; hairs flexuous, beige to pale brown, sparse, thin-walled, septate, 1–2.5 µm wide; neck conical, 60–90 µm high, 70–100 µm wide, glabrous, black. – Ascomal wall of textura angularis and textura prismatica in surface view, areolate, in longitundinal section 3-layered, 21.5–43 µm thick, inner layer pseudoparenchymatous, 8–11.5 µm thick, composed of 2–4 layers of elongate, flattened, hyaline, thin-walled cells, middle layer scleroplectenchymatous, 5.5–14 µm thick, composed of 2–3 layers of angular, dark brown, thick-walled melanized cells, outer layer prosenchymatous, 8–17.5 µm thick, composed of 2–5 layers of loosely interwoven hyphae which comprise the villose hairs. – Ascomal apex with periphyses. – Centrum hyaline. – Paraphyses filiform, 120–250 µm long, 2.5–8 µm wide, longer than asci, hyaline, numerous, septate, unbranched. – Asci cylindro-clavate to clavate, 95–150 X 15.5–21 µm, stipitate, stipe 25.5–38 X 2.5–3 µm, numerous, unitunicate, thin-walled, apex rounded; ring narrow, deep, refractive; with 8, biseriate to tetraseriate ascospores. – Ascospores broadly fusiform, with an apical wall extension, initially one-celled, 25.5–36.5 X 10–12 µm; ascospore becoming septate; upper cell ellipsoid, 23–30.5 X 10–12 µm, conical at apex, truncate at base, becoming brown to dark brown and 1-medially septate; lower cell differentiated by a septum, conical, 2.5–6 X 2.5–5.5, hyaline, commonly collapsing; apical wall extension apiculate, 4.5–8.5 X 0.5–1.5 µm, becoming pale brown to brown, rigid, persistent. (from Miller et al., Mycoscience (2006) 47:218–223) |
Occurrence |
Only known from type locality (Illinois). |
Similar Taxa Comments |
Cuspidatispora xiphiago shares a similar cephalothecoid ascomatal wall as that of Cercophora solaris. Both species group together with support in phylogenies of LSU data. |
Reference |
Miller, A.N., M. Bartolata, C.A. Shearer, and S.M. Huhndorf. 2006. Cuspidatispora xiphiago gen. et sp. nov. from eastern North American freshwater streams. Mycoscience 47(4): 218–223. DOI: 10.1007/s10267-006-0296-6 See also: http://fungi.life.illinois.edu/ http://fungi.life.illinois.edu/species_monographs/59 |