Pleosporales » Lentitheciaceae » Keissleriella

Keissleriella spartiicola

Keissleriella spartiicola Singtr. & K.D. Hyde [as 'sparticola'], in Liu et al., Fungal Diversity: 10.1007/s13225-015-0324-y, [105] (2015) (orthographic variant in Index Fungorum)

Index Fungorum number: IF 631217; Facesofungi number: FoF 00481

Etymology: The species epithet refers to “Spartium sp.” the host genus.

Holotype: MFLU 14-0116.

Saprobic on a dead branch of Spartium junceum. Sexual morph: Ascomata 134–259 μm high × 130–260 μm diam. (x̄ = 180 × 182 μm, n = 5), immersed in the host tissue, globose to subglobose, dark brown to black, round, dimidiate, ostiole central. Ostiole 47–84 μm high × 69–88 μm diam. (x̄ = 60 × 81 μm, n = 5), papillate, dark brown, smooth, with long, dark brown setae, with about 28–79 μm. Peridium 27–44 μm wide, thick, comprising 5–6 layers, outer layer comprising heavily pigmented, thick-walled, brown to dark brown cells of textura angularis, inner layer composed of hyaline, thin-walled cells of textura angularis. Hamathecium comprising numerous, 1.7–3.2 μm wide, filamentous, occasionally branched, septate, hyaline, pseudoparaphyses. Asci 104–123 × 17–23 μm (x̄ = 116 × 19 μm, n = 7), 8-spored, bitunicate, broadly cylindrical, smooth-walled, with an ocular chamber. Ascospores 24–29 μm high × 9–11 μm diam. (x̄ = 27 × 10 μm, n = 10), 2–4-overlapping seriate, oval to ellipsoid, with 2 layers, upper part wider than the lower part, 4–5-septate, with 1–3 vertical septa, hyaline, becoming yellowish at maturity. Asexual morph: Undetermined

Culture characters: Colonies on PDA slow growing, reaching 0.5–1 cm diam. after 1 week at 18 °C, later with dense mycelium, circular, margin smooth, white at first, pinkish-ash after 4 weeks, Hyphae thin, smooth-walled, branched septate, hyaline. Reverse similar.

Material examined: ITALY, Ravenna Province, Monticino, Brisighella, on a dead branch of Spartium junceum L. (Fabaceae), 18 September 2013, E. Camporesi IT 990 (MFLU 14-0116, holotype). ex-type culture, MFLUCC 14-0196.

GenBank: LSU: KP639571.

Notes: Keissleriella was introduced by Höhnel (1919) and is typified by K. aesculi Sacc (≡ Pyrenochaeta aesculi Höhn.). The genus Keissleriella is characterized by black setae in the ostiolar canal and hyaline 1 to multi-septate ascospores (Barr 1990). Based on the phylogenetic analysis from Liu et al. (2015) the new species of Keissleriella sparticola (in Liu et al. 2015 this epithet is spelled as sparticola and currently the name varied as spartiicola according to Index Fungorum 2021) has a close relationship with Keissleriella cladophila, Keissleriella genistae, Lentithecium lineare and Lentithecium aquaticum. However, our new species differs from these species in host, ascomata, periphyses, asci and/or ascospore characters.