Amniculicola aquatic
Amniculicola aquatica Z.L. Luo, K.D. Hyde & H.Y. Su, in Hyde et al., Fungal Diversity: 10.1007/s13225-019-00429-2, [13] (2019)
Index Fungorum number: IF555506 Facesoffungi number: FoF05308
Sexual morph: Ascomata 260–330 µm high, 250–320 µm diam., solitary, scattered, or in small groups, superficial, coriaceous, with basal wall remaining immersed in host tissue, globose to subglobose, black, often laterally flattened, with a flattened base not easily removed from the substrate, mostly bearing remnants of wood fibres. Peridium 35–50 µm thick, 2-layered, outer layer composed of small, dark brown to black, heavily pigmented, thick-walled cells of textura angularis, cells at apex smaller and walls thicker, inner layer composed of hyaline, thin-walled cells of textura angularis. Hamathecium of dense, very long trabeculate pseudoparaphyses. Asci 110–130(–152) × 10–13 µm (x̅ = 120 × 11.5 µm, n = 10), 8-spored, bitunicate, fissitunicate, cylindrical, with a short, narrowed, twisted, bifurcate pedicel. Ascospores 24–32 × 6–8 µm (x̅ = 28 × 7 µm, n = 25), obliquely uniseriate and partially overlapping, fusiform, with narrowly rounded to acute ends, hyaline, uniseptate, deeply constricted at the septum, sometimes curved, smooth, with 4–6 prominent guttules, and a wide gelatinous sheath. Asexual morph: Undetermined.
Habitat: Saprobic on decaying wood submerged in Erhai Lake
Known distribution: China
Material examined: CHINA, Yunnan Province, saprobic on decaying wood submerged in Erhai Lake, March 2015, Z.L. Luo, S-318 (MFLU 18–1324, holotype; HKAS 92579, isotype), ex-type living culture (MFLUCC 16–1123); saprobic on decaying wood submerged in Erhai Lake, March 2015, H.Y. Su, S-467 (MFLU 18–1325, paratype; HKAS 92559), ex-paratype living culture (MFLUCC 16–0915).
GenBank numbers: LSU: MK106096, TEF1-a: MK109800 (MFLUCC 16–1123), LSU: MK106097, SSU: MK106108, TEF1-a: MK109801 (MFLUCC 16–0915).
Notes: Amniculicola aquatica mostly resembles A. parva in having superficial, coriaceous ascomata of similar size, cylindrical asci with a short, narrowed, twisted, bifurcate pedicel and fusiform, hyaline ascospores with a wide gelatinous sheath. However, A. aquatica differs from A. parva has a thicker peridium, and uniseptate, wider ascospores (6–8 vs. 4.5–6.5 µm) (Zhang et al. 2009b). Phylogenetic analysis based on LSU, SSU and TEF1-a sequence data showed that A. aquatica is a distinct taxon in the genus Amniculicola.
Figure X. Amniculicola aquatica (MFLU 18–1324, holotype). a Appearance of ascomata on host substrate. b Section through ascoma. c Structure of peridium. d Pseudoparaphyses. e, f Asci. g–k Ascospores. Scale bars: b = 150 µm, e, f = 40 µm, c, d = 20 µm, g–k = 15 µm
Reference: Hyde KD, Tennakoon DS, Jeewon R, et al. (2019) Fungal diversity notes 1036–1150: taxonomic and phylogenetic contributions on genera and species of fungal taxa. Fungal Diversity 96: 1–242.
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