Dictyocheirospora bannica: a Colonies on submerged wood. b Conidia and conidiophores. c–f Conidia. g Germinated conidium. h, i Culture, h from above, i from reverse. Scale bars: a=200
μm, b, g=50 μm, c–f=30 μm
The family of this genus, Dictyosporiaceae, was created to accommodate a
holomorphic group of Dothideomycetes, including 12 genera that are saprobes on decaying wood and plant debris in terrestrial and freshwater habitats.[5] The latest genera to be included were Dictyocheirospora, Dictyopalmispora, Jalapriya and Vikalpa.[7]
Dictyosporium
The genus was analysed
molecularly and was previously situated phylogenetically inside the Massariinaceae family. But in 2015 Tanka et al. changed its position and situated the genus inside the current family Dictyosporiaceae.[5]
Dictyosporium is a
paraphyletic genus and although since 2015 the family is correctly identified, the
taxonomy of the genus is still unresolved and the number of species keeps changing.[7]
Number of Species
In 2012 Withon et al. added 11 species while Boonmee et al. removed 10 species from the genus. The next change was in 2013 when three new species were identified: D. aquaticum, D. meiosporum and D. thailandicum. In 2015 D. araucariae, D. indicum, D. hydei, D. olivacesporum, D. pseudomusae, D. sexualis, D. splendidum and D. wuyiense were newly identified. By 2017 the genus had 43 species while in 2018 two new species were identified (D. tubulatum and D. tratense) and the genus was formed by 45 species. [3]
The anamorph is characterized for producing sporodochial or effuse
conidiomata.[7] They produce branched colonies, cheroid, from pale brown to yellowish brown, smooth
conidia with 4-7 parallel rows of cells.[5][3][8] The conidiophores are inconspicuous.[8]
Dictyosporium is a heterogenous
paraphyletic assemblage of species and the characters of some can differ from the type species.[7] The principal characteristic used to differentiate between species is the conidia size and the number of row cells.[8]
The diagnostic features that separates Distyosporium from Massarinaceae are their conidia features.[8]
^Tanaka K, Hirayama K, Yonezawa H, Sato G, Toriyabe A, Kudo H, Hashimoto A, Matsumura M, Harada Y, Kurihara Y, Shirouzu T, Hosoya T. 2015. Revision of the Massarineae (Pleosporales, Dothideomycetes). Studies in Mycology 82: 75–136.
^
abcdefBoonmee S, D’souza M, Luo Z-L, Pinruan U, Tanaka K, Su H, Bhat DJ, Mckenzie E, Jones E, Taylor J, Phillips A, Hirayama K, Eungwanichayapant PD, Hyde K. 2016. Dictyosporiaceae fam. nov. Fungal Diversity, doi 10.1007/s13225-016-0363-z.