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Zenodo
2025
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| Онлайн доступ: | https://doi.org/10.5281/zenodo.17037799 |
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- <p><i>Ellisembia yuxiense</i> Q. F. Zhang, K. Habib & Q. R. Li sp. nov.</p><p>Fig. 2</p><p><b>Etymology.</b></p><p>The specific epithet refers to the location where the holotype specimen was collected, Yuxi City.</p><p><b>Type.</b></p><p>China • Yunnan Province, Yuxi City, Ailaoshan National Nature Reserve (24°5'7.01"N, 101°31'30.44"E), altitude: 1169 m, on moist decayed branch, 15 September 2024, Qinfang Zhang, 2024 ALS 177 -1 (GMB 5104, holotype; GMBC 5104, ex-type); KUN-HKAS 146987, isotype.</p><p><b>Description.</b></p><p><i>Saprobic</i> on decaying twigs of an unknown branch. <i>Sexual morph</i>: undetermined. <b><i>Asexual morph</i>: <i>Mycelium</i></b> superficial, septate, light brown to brown, numerous, scattered, single or in groups. <i>Conidiophores</i> 81–158 × 4–6 µm (av. = 110.3 × 5.1 µm, <i>n</i> = 30), macronematous, mononematous, solitary or caespitose, erect, verruculose, straight or slightly curved, becoming slightly narrower towards the apex, 7–12 - septate, smooth-walled, unbranched. <i>Conidiogenous cells</i> 3–6 × 2–4 µm (av. = 4.7 × 3.8 µm, <i>n</i> = 30), monoblastic, integrated, pale brown, terminal, cylindrical. <i>Conidia</i> 24–57 µm (av. = 40.4, <i>n</i> = 30) long, 6–9 µm (av. = 8.8 µm, <i>n</i> = 30) wide at the broadest part, tapering to 2–4 μm (av. = 3.4 μm, n = 30) wide at apex, 2–5 μm (av. = 3.4 μm, n = 30) wide at base, solitary, acrogenous, smooth, obclavate, truncate at the base, gray to light brown, without a mucilaginous cap, 5–9 - distoseptate, and also 3–5 euseptate.</p><p><b>Culture characteristics.</b></p><p>Conidia germinate on water agar within 12 hours. At 24 ° C, colonies growing on PDA reach a diameter of 10–15 mm after 7 weeks. Colonies convex, surface rough, moist, uneven, from above grayish-white, reverse dark brown to black. No pigmentation was produced in the culture medium.</p><p><b>Additional material examined.</b></p><p>China • Yunnan Province, Yuxi City, Ailaoshan National Nature Reserve (28°19'21.77"N, 104°00'19.21"E), altitude: 1419 m, on moist decayed branch, 15 September 2024, Qinfang Zhang, 2024 ALS 175 (GMB 5108; GMBC 5108).</p><p><b>Notes.</b></p><p>Phylogenetically, <i>Ellisembia yuxiense</i> formed a well-supported sister branch to <i>E. calyptrata</i> (HKUCC- 10821) (Fig. 1). However, the two species can be readily distinguished by conidiophore and conidia dimensions. <i>Ellisembia yuxiense</i> has significantly longer conidiophores (81–158 × 4–6 µm) compared to <i>E. calyptrata</i> (30–50 × 6–7 µm) and smaller conidia (24–57 × 6–9 µm vs. 60–90 × 9–12 µm) (Wu and Zhuang 2005; Shenoy et al. 2006). Morphologically, <i>Ellisembia yuxiense</i> resembles <i>E. cryptomeriae</i> in conidiophore size; however, the latter can be distinguished by its larger conidia, 20–85 × 7–14 µm with 6–17 septa, compared to <i>E. yuxiense</i>, which has conidia 24–57 × 6–9 µm with 5–9 septa. Differences from other morphologically similar species are provided in Table 2.</p><p>Furthermore, only the LSU and <i>rpb</i> 2 sequence data are accessible for <i>E. calyptrata</i>. A comparison of sequence data of the LSU and <i>rpb</i> 2 between <i>E. yuxiense</i> (GMB 5104) and <i>E. calyptrata</i> (HKUCC- 10821) shows 98.57 % sequence identity in LSU and 88.72 % sequence identity in <i>rpb</i> 2.</p>