Lasmenia balansae Speg. [as ‘balanse’], Anal. Soc. cient. argent. 22(2): 152 (1886). Fig. 5.

Endophytic or saprobic on various substrates on a range of host plants. Sexual morph: Undetermined. Asexual morph: Conidiomata 290 × 255 µm, acervular or stromatic, solitary to gregarious, or occasionally coalescing, initially immersed, erumpent at maturity, unilocular or irregularly multilocular, glabrous. Conidiomata wall 17 µm wide, composed of thin-walled, brown cells of textura angularis and periphery walls are composed of dark brown cells of textura angularis. Conidiophores 6–9 × 5–7 µm (x̅ = 8 × 6 µm, n = 10), cylindrical, simple or rarely branched, septate, hyaline, or reduced to conidiogenous cells. Conidiogenous cells 7–8.5 × 2–4 µm (x̅ = 8 × 2.5 µm, n = 10), holoblastic, phialidic, cylindrical, determinate, integrated or discrete, hyaline, smooth. Conidia 16 × 10 lm, ellipsoid or ovoid, truncate and protuberant at the base, apex obtuse, pale brown, aseptate, with a central guttule, thick and smooth-walled (description base on Wijayawardene et al. 2016).

Material examined: PARAGUAY, Cerra-Hú , prés de Paraguari, B. Balansa, November 1882, F59115, holotype.

Notes: Lasmenia was introduced without designating any type species and L. balansae was selected as the lectotype species (Von HÖhnel 1910). There are 12 species recorded under Lasmenia in Index Fungorum (2018). A few species have been transferred to Lasmeniella, but some species remain doubtful. Several Lasmenia species associated with tropical fruits as pathogens have been isolated. Subsequent molecular analyses placed Lasmenia within Diaporthales genera incertae sedis (Wijayawardene et al. 2016; Crous et al. 2017; Senanayake et al. 2017b). Asterosporiaceae Senan. Maharachch. & K.D. Hyde, in Senanayake et al. Stud. Mycol. 86: 217–296 (2017a).

Fig. 1 Consensus tree resulting from a RAxML analysis of a combined nrITS and nrLSU, sequence alignment for taxa of Apoharknessiaceae. Genera are indicated in coloured blocks. Bayesian posterior probabilities are given at the nodes. The scale bar represents the expected number of changes per site.

Fig. Lasmenia balansae (F59115). a Packet of herbarium. b Herbarium specimen. c Conidiomata on substrate. d Vertical cross section of conidiomata. e–f Conidia and conidiogenous cells. g–h Conidia. Scale bars: d = 100 µm, e–h = 10 µm.