Homortomyces tamaricis Wijayaw., Camporesi & K.D. Hyde, in Wijayawardene et al., Phytotaxa 176(1): 160 (2014). Index Fungorum Number: IF550192
Saprobic on Tamarix gallica L. Sexual morph: Ascomata 180–275 μm high × 270–340 μm diam. (x = 234 × 310 μm, n = 6), scattered, immersed to partially erumpent, black, globose to subglobose, ostiolate. Peridium 20–45 μm wide, comprising 4–6 layers of brown to dark brown, thick-walled cells of textura angularis. Hamathecium composed of 2–4 μm wide, septate, cellular pseudoparaphyses. Asci 75–98 × 18– 22 μm (x = 85 × 20.6 μm, n = 8), mostly (1–)2–6-spored, bitunicate, fissitunicate, cylindrical, short pedicellate, apically rounded, with a distinct ocular chamber. Ascospores 23– 29 × 8.5–12 μm (x = 26 × 10.1 μm, n = 25), uni- to bi-seriate, fusiform with broadly to narrowly rounded ends, yellowish brown to brown, 3-septate, slightly curved, smooth-walled, without a mucilaginous sheath. Asexual morph: Conidiomata 150–240 μm high × 300–360 μm diam. (x = 203 × 332 μm, n = 6), solitary or gregarious, immersed to slightly erumpent, pycnidial to irregular, uniloculate to multi-loculate, subglobose, ostiolate. Conidiomatal wall 9–23 μm (x = 14.3 μm, n = 15), comprising a few layers oflightly pigmented to hyaline cells of textura angularis. Paraphyses numerous, aseptate, cylindrical. Conidiophores reduced to conidiogenous cells. Conidiogenous cell 6–27 × 2.5–5.5 μm (x = 14 × 3.5 μm, n = 20), with supporting cell, hyaline, percurrently proliferating at the tip of the supporting cells. Conidia ellipsoid to subcylindrical, straight to slightly curved, in vivo; 22–27.5 × 9–12.2 μm (x =24.6 × 11 μm, n = 30), golden brown to dark brown, becoming coloured before release from conidiogenous cells, smooth walled, 3-septate, apex obtuse, base truncate, smooth-walled; in vitro; 20–31 × 8.5–12.5 μm (x = 24.5 × 10.5 μm, n = 30), light brown, aseptate or 1-septate, guttulate.
Culture characteristics: Ascospores germinating on PDA within 18 h and germ tubes produced from one or both ends. Colonies growing on PDA at 25 °C reaching 30 mm diam. After 14 days at 25 °C, irregular, flat, moderately dense, surface white, with slightly undulate edge, producing conidia after 14 days frequently at the margin.
Material examined: ITALY, Province of Forlì-Cesena [FC]), Ravaldino in Monte Forlì, on dead branches of Tamarix gallica L. (Tamaricaceae), 22 November 2012, Erio Camporesi IT 922 (MFLU 14–0595, sexual morph), ex-type living culture of sexual morph MFLUCC 13– 0280, ICMP 20745; Fiumana – Predappio, on dead branches of Tamarix gallica L. (Tamaricaceae), 25 September 2013, Erio Camporesi IT 922–2 (MFLU 14–0596, asexual morph), living culture MFLUCC 14–0167, ICMP 21071.
FIG Homortomyces tamaricis (sexual morph, MFLU 14–0595) a,b Appearance of ascomata on host surface c Vertical section through ascoma d Peridium e Pseudoparaphyses f-i Mature bitunicate asci j-l Ascospores m Germinating ascospore. Scale bars: c = 100 μm, d = 50 μm, e, j-m = 10 μm, f- i = 20 μm
FIG Homortomyces tamaricis (asexual morph MFLU 14–0596) a,b Appearance of conidiomata on host m, n Appearance of conidiomata on PDA c, d, o Vertical sections through conidiomata e, f, p Conidiomatal wall g-i, q–s Developing conidia and paraphyses j, k Conidia l Germinating conidia. Scale bars: c-f = 50 μm, g = 20 μm, h-l, q-s = 10 μm, o, p = 100 μm