Chloridium paucisetosum K. Y. Wang, T. P. Wei &amp; Y. L. Jiang 2022, sp. nov.
Creators: name: Wei, Tian-Peng
name: Wang, Kun-Ying
name: Zhang, Hong
name: Luo, Ming-Yan
name: Jia, Wei-Yu
name: Zeng, Yan
name: Jiang, Yu-Lan
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Fungi
Ascomycota
Sordariomycetes
Chaetosphaeriales
Chaetosphaeriaceae
Chloridium
Chloridium paucisetosum

description: <i>Chloridium paucisetosum</i> K.Y. Wang, T.P. Wei &amp; Y.L. Jiang, <i>sp. nov.</i> (Fig. 3) MycoBank: MB 841485 Etymology:—referring to the lack of setae. Type:— CHINA, Guizhou Province: Kaili City, isolated forest soil, 26.2402°N, 107.7722°E, 1500 m above sea level, 15 March 2018, <i>K. Y</i> <i>.</i> <i>Wang</i> &amp; <i>T. P</i> <i>.</i> <i>Wei</i> (holotype HGUP 1806, isotype CGMCC3.19620, ex-type living culture GUCC 1806). Description:— <i>Mycelium</i> consisting of smooth, subhyaline to brown, branched, thin-walled, septate, 2–4 µm diam hyphae. <i>Conidiophores</i> macronematous, mononematous, solitary, branched at the apex, scattered, wider at the base, erect, brown, paler and slightly tapering upward, straight or slightly flexuous, smooth, septate, cylindrical, 50–372 × 4.5–9.5 μm. <i>Conidiogenous cells</i> integrated, terminal, cylindrical or lageniform to ampulliform, with a conspicuous outer collarette, subhyaline to pale brown, smooth, 5.0–10 × 2.0–3.5 µm. <i>Conidia</i> obovoid or ellipsoidal, acrogenous, subhyaline to pale brown, solitary, aseptate, guttulate, thin-walled, 2.5–5.0 × 2–2.5 μm. Sexual stage not observed. Culture characteristics:—Colonies on PDA effuse, thinly hairy, with sparse to moderate aerial hypha, pale to medium brown, reaching 20 mm diam at 25 ± 1 °C after 7 days. Notes:— <i>Chloridium paucisetosum</i> shares a few morphological similarities with <i>C. aquaticum</i>, <i>C. humicola</i> and <i>C. terricola</i> in having branched conidiophores and phialidic conidiogenous cells. Nevertheless, <i>C. paucisetosum</i> showed high heterogeneity, forming a monophyletic clade, which was genetically distant from all species (Fig. 1). Morphologically, <i>C. paucisetosum</i> can also be distinguished from these species. <i>Chloridium aquaticum</i> produces ellipsoidal to cylindrical conidia in slimy masses (Wei <i>et al</i>. 2018); The conidia of the <i>C. humicola</i> are aggregating in hyaline slimy masses and smaller (2.7–3.6 × 1.5–2.0 µm), as well as longer conidiophores (700 × 8.0 µm; Jong &amp; Davis 1972); <i>C. terricola</i> differs by its truncate at the base and smaller conidia (2–3 × 2–2.5 µm; Wang <i>et al</i>. 2017). Furthermore, The PHI tests revealed that no evidence of recombination (&amp;Fcy;w = 0.2545) was detected between <i>C. paucisetosum</i> and its closely related taxa (Fig. 2).
description: Published as part of <i>Wei, Tian-Peng, Wang, Kun-Ying, Zhang, Hong, Luo, Ming-Yan, Jia, Wei-Yu, Zeng, Yan &amp; Jiang, Yu-Lan, 2022, A new species and a new combination of Chloridium from southwest China, pp. 67-76 in Phytotaxa 549 (1)</i> on pages 71-72, DOI: 10.11646/phytotaxa.549.1.5, http://zenodo.org/record/6605361
description: {"references": ["Wei, M. J., Zhang, H., Dong, W. E. I., Boonmee, S. &amp; Zhang, D. I. (2018) Introducing Dictyochaeta aquatica sp. nov. and two new species of Chloridium (Chaetosphaeriaceae, Sordariomycetes) from aquatic habitats. Phytotaxa 362 (2): 187 - 199. https: // doi. org / 10.11646 / phytotaxa. 362.2.5", "Jong, S. C. &amp; Davis, E. E. (1972) Phialocephala humicola, a new hyphomycete. Mycologia 64 (6): 1351 - 1356. https: // doi. org / 10.1080 / 00275514.1972.12019390", "Wang, Y., Jie, C. Y., Hyde, K. D., Jiang, Y. L., Zhang, T. Y. &amp; Zhao, D. G. (2017) Chloridium terricola sp. nov. from China. Mycotaxon 132 (1): 79 - 86. https: // doi. org / 10.5248 / 132.79"]}