Sporoschisma hemipsila (Berk. & Broome) Zelski, A.N. Mill. & Shearer, IMA Fungus, 2125

Yang, Jing, Liu, Jian-Kui, Hyde, Kevin D., Bhat, D. Jayarama, Jones, E. B. Gareth & Liu, Zuo-Yi, 2016, New species of Sporoschisma (Chaetosphaeriaceae) from aquatic habitats in Thailand, Phytotaxa 289 (2), pp. 147-157 : 150-152

Sporoschisma hemipsila (Berk. & Broome) Zelski, A.N. Mill. & Shearer, IMA Fungus 5(2): 433 (2014). Fig. 2

Basionym: Sphaeria hemipsila Berk. & Broome, Bot. J. Linn. Soc. 14: 126 (1873).

= Sporoschisma saccardoi E.W. Mason & S. Hughes, Mycol. Pap. 31: 20 (1949).

Saprobic on decaying plant substrates. Asexual morph: Colonies effuse, black, hairy. Mycelium immersed, composed of pale to dark brown hyphae. Setae scattered or in groups mixed with conidiophores, capitate, usually with hyaline mucilage at the swollen apex, smooth-walled, pale to medium brown, becoming paler towards the apex, straight or flexuous, 2−3-septate, 75−175 × 4.5–7 μm, 6–12 μm wide at the swollen apex. Conidiophores macronematous, mononematous, smooth, dark brown to black, paler at the apex, straight or slightly flexuous,

solitary or in small groups of 2−3 with 1−4 setae, each composed of a bulbous base, a cylindrical stipe and a swollen venter with a long cylindrical neck, erect, 210–255 μm long, 9.5–16 μm wide below venter and 14–21

μm wide above, 17.5–26 μm wide at venter, with a vase-like apex. Conidiogenous cells monophialidic, integrated,

terminal, determinate, brown, lageniform, with serrated, flared margin at free end. Conidia formed enteroblastically inside the tubular collarette of the conidiogenous cell and emerging in a chain, cylindrical to doliiform, 36.5–53 × 10–13 μm (x = 45.5 × 11.5 μm, n = 30), 1−5-euseptate, with conspicuously darkened septa, hyaline when young,

olivaceous to brown at maturity, the two end cells paler and shorter than the central four cells. Sexual morph: not observed.

Material examined: — THAILAND. Prachuap Khiri Khan Province: Hua Hin, stream outside Kaeng Krachan

National Park, on submerged wood, 25 December 2014, Jaap van Strien, Site 4-16-6 ( MFLU 15-1150), living culture,

MFLUCC 15-0615, GZCC 15-0069; Site 5-8-1 ( MFLU 16-1324), living culture, MFLUCC 16-0177.

Figures

FIGURE 2. Sporoschisma hemipsila (MFLU15-1150) a. Colony on wood. b−d. Conidia, setae and conidiophores.e, f. Portion of phialide producing conidia. g−j. Conidia. k. Germinating conidium. l, m. Cultures on MEA, l from above, m from below. Scale bars: a = 200 μm, b, e, f = 50 μm, c = 60 μm, d = 70 μm, g, h = 40 μm, i−k = 30 μm.