Pleosporales » Amniculicolaceae » Amniculicola

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 ( = 120 × 11.5 µm, n = 10), 8-spored, bitunicate, fissitunicate, cylindrical, with a short, narrowed, twisted, bifurcate pedicel. Ascospores 24–32 × 6–8 µm ( = 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.