Pleosporales » Dictyosporiaceae » Dictyosporium

Dictyosporium digitatum

Dictyosporium digitatum J.L. Chen, C.H. Hwang & Tzean

Index Fungorum number: 355284

 

Sexual morph: Undetermined. Asexual morph: Colonies on natural substratum in the form of sporodochia. Conidia 46.5–74(–88) × 26-46 µm uniformly pale to medium reddish brown, complanate, cheiroid, maize-like, consisting of 6-8 parallel, tightly appressed arms which are flattened in one plane, terminal cells of each arm are provided with a hyaline, thin-walled, straight or curled appendage. (Goh et al. 1999)

 

Materials examined: AUSTRALIA, Pine Creek, northen Queensland, on dead petiole of Archontophoenix alexandrae (Arecaceae), 17 Apr. 1995, J.E. Taylor and K.D. Hyde JP2217 (HKU(M) 3759); ibid., Atherton Tablelands, Lake Barrine, on submerged wood, Apr. 1996, K.D. Hyde and CA Pearce LBll (HKU(M) 3204); ibid., (HKU(M) 3236); BRUNEI DARUSSALAM, Temburong, Batu Apoi Forest Reserve, Sungai Belalong, Kuala Be1a1ong Field Studies Centre, on submerged wood, 29 Aug. 1997, K.D. Hyde BRU48 (HKU(M) 6593); HONG KONG, Tai Po Kau Forest Stream, on submerged wood, 21 Sep. 1996, W.H. Ho and K.M. Tsui (HKU(M) 4835); ibid., 29 Dec. 1996, W.H. Ho (HKU(M) 5912, 5913, 5937); ibid., 27 Dec. 1997, W.H. Ho (HKU(M) 8694, 8716); ibid., on submerged wood baits of Machilus velutina (Lauraceae), 21 Sep. 1996, W.H. Ho and KM. Tsui (HKU(M) 4851, 4854, 4855, 4856, 4857, 4859, 4861, 4862, 4865, 4868); ibid., 29 Mar. 1997, W.H. Ho (HKU(M) 6032, 6033, 6037, 6038, 6039, 6040, 6041, 6042, 6043, 6044, 6049, 6050); ibid., 28 June 1997 (HKU(M) 6135, 6136, 6137); ibid., on submerged wood baits of Pinus massoniana (Pinaceae), 21 Sep. 1996, W.H. Ho and KM. Tsui (HKU(M) 4881); ibid., 29 Dec. 1996, W.H. Ho and S.Y. Ho (HKU(M) 5965, 5971); ibid., 29 Mar. 1997, W.H. Ho (HKU(M) 6051); ibid., 28 June 1997 (HKU(M) 6141, 6153, 6154, 6155, 6157, 6158, 6159); ibid., 28 Sep. 1997 (HKU(M) 8673, 8676, 8677, 8679, 8680, 8681, 8682, 8687); ibid., 27 Dec. 1997 (HKU(M) 8766, 8768, 8772, 8774, 8777, 8778, 8779, 8780); New Territories, Tai Po, Lam Tsuen River, on submerged wood, Apr. 1997, K.M. Tsui KMI78 (HKU(M) 5424); Plover Cove Reservoir, on submerged wood, 15 Nov. 1996, KD. Hyde (HKU(M) 4729); ibid., 18 Nov. 1996, K.D. Hyde and M. Wong (HKU(M) 4734, 4739, 4748); ibid., 15 Feb. 1997, V.R. Mala (HKU(M) 5241); THE SEYCHELLES, Mahe, L'Eniol, Riviere Sainte Marie Louise, on submerged wood, 15 Aug. 1996, KD. Hyde $20 (HKU(M) 3294); THAILAND, Nakom Ratchasima Province, Khao Yai National Park, Tad Ta Phu, on submerged test block of Anisoptera oblonga (Annonaceae), 14 Mar. 1997, Somsak Sivichai (SS0257); ibid., 25 Mar. 1997 (SS0283). Known distribution: Australia, Brunei Darussa1am, Hong Kong, Taiwan

 

Freshwater distribution: Australia (Goh et al. 1999), Brunei (Goh et al. 1999), China (Goh et al. 1999; Tsui et al. 2000, 2001), Thailand (Sivichai et al. 2002)

 

References

Goh TK, Hyde KD, Ho WH, Yanna (1999) A revision of the genus Dictyosporium, with descriptions of three new species. Fungal Divers 2:65–100

Tsui CKM, Hyde KD, Hodgkiss IJ (2001) Colonization patterns of wood-inhabiting fungi on baits in Hong Kong rivers, with reference to the effects of organic pollution. Antonie van Leeuwenhoek 79:33–38

Tsui KM, Hyde KD, Hodgkiss IJ (2000) Biodiversity of fungi on submerged wood in Hong Kong streams. Aquat Microb Ecol 21:289–298

Sivichai S, Jones EBG, Hywel-Jones NL (2002) Fungal colonisation of wood in a freshwater stream at Tad Ta Phu, Khao Yai National Park, Thailand. Fungal Divers 10:113–129

 

Figs. 23-26. Conidia of Dictyosporium digitatum, 23 and 25 from Thailand collection (SS0283), 24 and 26 from Hong Kong collection (HKU(M) 4857). Scale bars: 21, 22 = 10 µm, 23-26 = 20 µm

 

Recent Genus

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