Lentomitella
Lentomitella Höhn., Annls mycol. 3(6): 552 (1906) [1905]
Diaporthomycetidae, Xenospadicoidales, Xenospadicoidaceae, Lentomitella
Index Fungorum number: IF2736; 11 morphological species (Species Fungorum 2020); 9 species with sequence data.
Lignicolous in terrestrial and freshwater environments. Sexual morph: Ascomata perithecial, astromatic, immersed or partially erumpent with the neck protruding or superficial, scattered, solitary or grouped. Neck cylindrical or rostrate with sulcation, subhyaline to dark brown. Ostiole periphysate. Peridium two layered. Paraphyses longer than the asci, hyaline, disintegrating at maturity, septate, constricted at the septa. Asci 8-spored, unitunicate, cylindrical or cylindrical-clavate, with broad rounded or truncate apical region, with a J-, apical ring, pedicellate. Ascospores overlapping uniseriate, hyaline or pale brown, aseptate or septate, ellipsoidal to fusiform, ovoid, sub-oblong, with longitudinal striations, 1–3-septate with second and third septum forming at a late stage, with 2–4 big drops. Asexual morph: Hyphomycetous. Colonies effuse. Conidiophores macronematous, mononematous, branched or unbranched, septate, brown near base, subhyaline to hyaline towards the apex. Conidiogenous cells terminal or intercalary, hyaline, subcylindrical to flask-shaped, with a short terminal rachis bearing a few denticles. With holoblastic-denticulate conidiogenesis. Conidia globose, ellipsoidal, obovoid to clavate, hyaline, aseptate, with a slightly apiculate base, smooth-walled (adapted from Réblová et al. 2018).
Type species: Lentomitella vestita (Sacc.) Höhn., Annls mycol. 3(6): 552 (1906) [1905]
Notes: Lentomitella was introduced by von Höhnel (1905) who segregated this genus from Ceratostomella Sacc. based on the ornamentation of the ascospores of C. vestita as Lentomitella vestita. Lentomitella can be distinguished from Ceratostomella by asci, ascospores and the centrum (Réblová 2006). Lentomitella was historically assigned to Lasiosphaeriaceae (Untereiner 1993) and Clypeosphaeriaceae (Barr 1990, Eriksson et al. 2003). Réblová (2006) reinstated Lentomitella with three accepted species, L. cirrhosa, L. crinigera and L. tomentosa, and their phylogenetic analyses showed Lentomitella resided in Sordariomycetes incertae sedis. Réblová et al. (2018) divided Ceratostomella species and other similar taxa into four genera, Calyptosphaeria, Lentomitella, Spadicoides, and Torrentispora, which represent Xenospadicoidaceae.
Lentomitella cirrhosa is saprobic on decaying wood. Since the type specimen of L. cirrhosa is unavailable, Réblová (2006) designated a collection from New Zealand on decayed wood of Podocarpus totara (PDD 81434) as the epitype. Sphaeria cirrhosa was accepted in Ceratostoma by Fuckel (1870). However, Saccardo (1882) transferred S. cirrhosa to Ceratostomella as C. cirrhosa. Réblová (2006) later transferred C. cirrhosa to Lentomitella.
Species illustrated in this entry:
Lentomitella cirrhosa (Pers.) Réblová
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