Kylindria aquatica Z.L. Luo, Maharachch. & Cheew, 2018

Maharachchikumbura, Sajeewa S. N., Luo, Zong-Long, Su, Hong-Yan, Al- Sadi, Abdullah M. & Cheewangkoon, Ratchadawan, 2018, Reticulascaceae hyphomycetes from submerged wood in Yunnan, China, Phytotaxa 348 (3), pp. 187-198 : 193-196

Kylindria aquatica Z.L. Luo, Maharachch. & Cheew sp. nov.

Index Fungorum number: IF554446; Facesoffungi number: FoF 04476, Fig. 5

Etymology:—In reference to the aquatic habitat.

Holotype:— MFLU 17–1967 .

Saprobic on submerged decayed wood in aquatic habitats. Sexual morph: Undetermined. Asexual morph: Hyphomycetous. Colonies on natural substratum partly superficial, effuse, scattered, greyish, shining. Mycelium immersed, composed of septate, unbranched, subhyaline to pale brown, smooth-walled hyphae. Conidiophores 137– 247 μm long (x = 192 μm, SD =55, n =10), 7–9 μm wide (x = 8 μm, SD = 1, n = 10), mononematous, macronematous, straight or slightly flexuous, unbranch, 3–5-septate, dark brown, smooth. Conidiogenous cells phialidic, ampuliform, terminal, integrated, smooth. Conidia 20–24 μm long (x = 22 μm, SD = 2, n =30), 9–11 μm wide (x = 10 μm, SD = 1, n = 30), oblong with obtuse ends, 0–3-septate (mainly 3), slightly constricted at septa, hyline, smooth, with a slimy mucilaginous coating around, slightly curved to side at base.

Materials examined: CHINA, Yunnan Province, Dali, saprobic on decaying wood submerged in a stream in Cangshan Mountain , July 2014, S.S.N. Maharachchikumbura, XP H 2–38–1 (S-863), ( MFLU 17–1967 , holotype), ex-type living culture MFLUCC 17–1681 ; saprobic on decaying wood submerged in Dulong river , June 2014, Z.L. Luo, 2D H 2–23–1 ( MFLU 17–1966 , paratype), living culture DLUCC 0931 .

Notes: Zhang et al. (2010) recognized 14 species in the genus Kylindria . However, ever since several of them were transferred to Cylindrotrichum and 10 species are presently recognized namely; Kylindria conglutinata Matsush. , K. embeliae Y.D. Zhang & X.G. Zhang , K. keitae Rambelli & Onofri , K. millettiae Y.D. Zhang & X.G., K. obesispora R.F. Castañeda , K. oblongispora (Morgan-Jones) DiCosmo, S.M. Berch & W.B. Kendr. , K. peruamazonensis Matsush. , K. pluriseptata R.F. Castañeda and K. trichothecioidea W.B. Kendr. & R.F. Castañeda and Kylindria triseptata (Matsush.) DiCosmo, S.M. Berch & W.B. Kendr. Out of them K. conglutinata , K. embeliae and K. keitae have aseptate conidia. Kylindria aquatica which is similar to Kylindria millettiae (19.5–24 × 6.5–9 μm), K. excentrica (27.5–35 × 7.5–8.5 μm), K. ellisii (14–19 × 3–5 μm), K. peruamazonensis (12.5–23 × 4–7.5 μm); and K. triseptata (18–24 × 6–7.5 μm) ( DiCosmo et al. 1983, Bhat & Sutton 1985, Rambelli & Onofri 1987, Matsushima 1993) in its three septate conidia but differs prominently by wider (20–24 × 9–11 μm), oblong conidia. Kylindria aquatica also share similar characters with K. oblongispora in size and shape of conidiophores and oblong conidia. However, Kylindria aquatica differs from K. oblongispora by its 0–3-septate, bigger conidia (20–24 × 9–11 μm vs 6–7 × 2.5–3 μm). Phylogenetically, it is formed a distinct clade from those species of Kylindria which the molecular data are available.

Figures

FIGURE 5. Kylindria aquatica (MFLU 17–1967, holotype). a Colonies on wood. b-d Conidiophores. e Conidiogenous cells f–h Conidia. i–j Colonies on MEA from surface and reverse. Scale bars: b = 40 μm, c, d=50 μm, e= 35 μm, f = 25, g–h= 15μm.