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| Format: | Recurso digital |
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Zenodo
2025
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| Online Access: | https://doi.org/10.5281/zenodo.17662203 |
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Table of Contents:
- <p><i>Mortierella irregularispora</i> X. Y. Ji, H. Zhao & X. Y. Liu sp. nov.</p><p>Fig. 6</p><p><b>Type.</b></p><p>China • Xizang, Shigatse City, Nyalam County, (28°17'53"N, 85°58'26"E, altitude 4300 m), from soil, 27 June 2024, X. Y. Ji, holotype HMAS 354074, ex-holotype living culture CGMCC 3.28893 (= XG 00435-2-1).</p><p><b>Etymology.</b></p><p>The epithet <i>irregularispora</i> (Lat.) refers to irregular sporangiospores.</p><p><b>Description.</b></p><p>Colonies on PDA at 16 ° C for 5 d, reaching 53 mm diameter, slow growing with a rate of 10.6 mm / d, with a wet dog smell, with sparse aerial mycelia. Hyphae hyaline, upright or bent, sometimes swollen. Sporangiophores arising from aerial mycelia, erect or slightly bent, unbranched, 48.6–176.7 µm long (n = 15, x ̄ = 89.5 µm), 4.3–7.3 µm (n = 15, x ̄ = 5.3 µm) wide at the base, and 2.2–3.0 µm (n = 15, x ̄ = 2.8 µm) wide at the top. Sporangia almost spherical, smooth, 7.3–19.6 µm in diameter (n = 15, x ̄ = 15.0). Sporangiospores hyaline, with irregular shape, smooth, 3.3–4.7 µm vertical height (n = 15, x ̄ = 4.0). Chlamydospores absent. Zygospores not observed.</p><p><b>Temperature requirements.</b></p><p>Minimum growth temperature 4 ° C, and maximum growth temperature 28 ° C.</p><p><b>Additional strains examined.</b></p><p>China • Xizang, Shigatse City, Nyalam County (28°17'53"N, 85°58'26"E, altitude 4300 m), from soil, 26 June 2024, X. Y. Ji, living culture XG 00435-2-2.</p><p><b>Notes.</b></p><p>Phylogenetic analysis of five loci (ITS, LSU, SSU, <i>RPB 1</i>, and <i>Act</i>) showed that the new species <i>M. irregularispora</i> is closely related to <i>M. parvispora</i> (Fig. 2). The new species is distinguished from <i>M. parvispora</i> by 46 / 629, 117 / 1061, and 27 / 1019 characters in ITS, LSU, and SSU sequences, respectively. Morphologically, compared to <i>M. parvispora</i>, the new species has smaller sporangia (7.3–19.6 µm vs 20.0–35.0 µm), larger sporangiospores (3.3–4.7 µm vs 2.0–3.0 µm), and no chlamydospores.</p>