Pleosporales » Melanommataceae » Camposporium

Camposporium pellucidum

Camposporium pellucidum (Grove) S. Hughes
Index Fungorum number: IF 294002; Facesoffungi number: FoF 07065

Bactrodesmium caulincola var. pellucidum Grove, J. Bot., Lond. 24: 200 (1886)


Saprobic on submerged decaying wood in freshwater. Sexual morph: Undetermined. Asexual morph: Colonies on substratum effuse, superficial, black. Mycelium mostly immersed, composed of hyaline, branched, smooth hyphae. Conidiophores micronematous, mononematous, solitary, short, unbranched, flexuous, septate, pale brown to subhyaline, smooth. Conidiogenous cells monoblastic, terminal, integrated into the apical region of the conidiophores, subhyaline, smooth. Conidia 112–157 μm long (= 134.5 μm, SD = 22.3, n = 30), 8.8–12.3 μm wide (= 10.6 μm, SD = 1.7, n = 30), solitary, cylindrical to elongate, rounded at apex, truncate at the ends, 10–16-septate, the middle cells are brown, both of end cells are pale brown to subhyaline, without appendage. (Descriptions from Hyde et al. 2020)


Culture characteristics: Conidia germinating on PDA within 24 h. Colonies on PDA at room temperature reaching 2 cm diam. in 2 weeks, mycelium pale brown to grayish brown after 3 weeks, composed pale brown to brown, septate, smooth hyphae.


Material examined: CHINA, Yunnan Province, saprobic on submerged decaying wood in Lancang River, December 2016, Z.L. Luo, 2L H 4–36–3, S-1239 (DLU 1239), living culture, DLUCC 1239.


Known host and distribution: Occurring on wood, bark, fruit of various trees, shrubs and dead herbaceous stems (Finland, Britain and Netherlands; Gönczöl and Révay 2004).


GenBank numbers: ITS = MN758891, LSU = MN759022, SSU = MN758957, TEF1-α = MN784095.


Notes: Camposporium pellucidum S. Hughes was introduced by Hughes (1951) based on the variety Bactrodesmium caulincola var. pellucidum Grove. It is characterized by macronematous, mononematous, unbranched conidiophores, cylindrical or more usually cylindric-fusoid conidia, up to 16-septate, truncated at base, rounded at apex or subulate elongated into a long filiform septate appendage. Morphologically, our new isolate fits well with the characters of C. pellucidum in having macronematous, mononematous, unbranched conidiophores and similar size (112–157 × 8.8–12.3 versus 80–140 × 7.5–12 μm), septation (10–17 versus 7–16) and shape of conidia (cylindrical to elongate, rounded at apex, truncate at the ends). However, in our specimen we did not observe the appendage. Phylogenetic analysis also showed that our isolate clustered with C. pellucidum with high statistical support (97% ML, 0.99 BYPP). Therefore, we identified our isolate as C. pellucidum and it is a new record for China. (Notes from Hyde et al. 2020)