Gespeichert in:
| Hauptverfasser: | , , , , , , |
|---|---|
| Format: | Recurso digital |
| Sprache: | |
| Veröffentlicht: |
Zenodo
2025
|
| Schlagworte: | |
| Online-Zugang: | https://doi.org/10.5281/zenodo.17468230 |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Inhaltsangabe:
- <p><i>Masuyamyces dongshanensis</i> D. Xie, H. W. Chen & D. F. Chi sp. nov.</p><p>Fig. 13</p><p><b>Etymology.</b></p><p>The epithet <i>dongshanensis</i> (Latin) refers to the Dong Shan village from where this taxon was first isolated.</p><p><b>Diagnosis.</b></p><p><i>Masuyamyces dongshanensis</i> is phylogenetically distinct from all morphologically similar species, from which it can be readily distinguished using molecular sequence data for the ITS and the beta-tubulin (<i>βT</i>) (Fig. 7, Suppl. material 12).</p><p><b>Type.</b></p><p><b>China</b> • Shandong Province: Yantai City, from <i>H. ligniperda</i>, Apr. 2023, D. an Xie (<i>holotype</i> HMAS 354191, dried culture prepared from NFF 1645; ex-holotype culture CGMCC 3.28603 = NFF 1645).</p><p><b>Description.</b></p><p><i>Sexual morph</i> perithecial. <i>Perithecia</i> appeared after 35 days of cultivation on sterilized wooden chips or 30 days of cultivation on 2 % MEA, superficial or partly embedded, globose, black, the outer layer with hyphal ornamentation, (249 –) 367–606 (– 727) μm diam. <i>Ascomatal</i> necks black, straight or slightly curved, (410 –) 480–1038 (– 1849) µm long, (77 –) 107–161 (– 195) µm wide at base, (18 –) 22–41 (– 52) µm wide at the apex. In culture, necks sometimes 2–4 per ascoma. Asci and ascospores were not observed. <i>Asexual morphs</i> observed both synnematous and mononematous. <i>Synnematous morph</i>: pesotum-like, the base transparent or light yellow, aggregating into a transparent mucilaginous spore drop, (64 –) 96–218 (– 316) μm tall, including the <i>conidiogenous</i> apparatus, (40 –) 58–108 (– 149) μm wide. <i>Mononematous morph</i>: hyalorhinocladiella-like, <i>conidiogenous cells</i> arising directly from mycelium, (22 –) 23–165 (– 359) × (2 –) 2.5–3.5 (– 4) µm; <i>conidia</i> hyaline, single-celled, smooth, obovoid to bacilliform, (6 –) 7–9 (– 10) × (2 –) 2.5–3 (– 4) μm.</p><p><b>Culture characteristics.</b></p><p>Colonies on 2 % MEA medium slow growing in the dark, reaching 72 mm in diam. in 15 days at 25 ° C, growth rate up to 4.5 mm / day at the fastest, part of the mycelium grows in the agar, pure white. Optimal growth temperature 30 ° C, slow growth at 5–10 ° C.</p><p><b>Ecology.</b></p><p>Isolated from migratory beetles living in <i>Pinus</i> hosts. Insect vector: <i>H. ligniperda</i>.</p><p><b>Additional specimens examined.</b></p><p><b>China</b> • Shandong Province: Yantai City, from <i>H. ligniperda</i>, Apr. 2023, D. Xie (living culture NFF 1646).</p><p><b>Distribution.</b></p><p>Currently known only from Shandong Province, China.</p><p><b>Notes.</b></p><p><i>Masuymyces dongshanensis</i> is phylogenetically most closely related to <i>M. xishanensis</i>. Morphologically, it can be distinguished from <i>M. xishanensis</i> by the presence of ascomatal necks and its distinctive pesotum-like asexual morph, which is transparent, mucilaginous, and aggregates into irregularly edged, chip-like masses. Based on both phylogenetic and morphological evidence, we propose the recognition of <i>M. dongshanensis</i> as a novel species.</p>