identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03D08792FFB221304E96569FFB8BF7BF.text	03D08792FFB221304E96569FFB8BF7BF.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Xylochrysis aquatica J. Y. Song & X. D. Yu	<div><p>Xylochrysis aquatica J.Y. Song &amp; X.D. Yu sp. nov. (FIG. 2)</p> <p>MycoBank: MB844596</p> <p>Etymology: In reference to the aquatic habitat of the fungus</p> <p>Holotype: HKAS 124019</p> <p>Saprobic on submerged decaying wood in a freshwater stream. Sexual morph: Ascomata 160–265 µm diam. × 145– 290 µm high (x = 200 µm × 205 µm, n = 10), solitary, scattered, immersed to slightly erumpent, globose to subglobose, nonstromatic, uniloculate, glabrous, without a golden yellow layer of surrounding cells at the basal venter, ostiolate. Ostiole 65–135 µm long, 65–130 µm diam. (x = 108 µm × 96 µm, n = 10), black, papillate, glabrous, shiny, lined with hyaline periphyses. Ascomatal wall multi-layered, outer layers 12–47 µm thick, composed of brown to dark brown cells of textura angularis, carbonized and form a thicker layer in the lower part of the ostiole, inner layers 13–33 µm, comparatively thick, composed of flattened, hyaline cells of textura prismatica. Hamathecium 2.5–5.0 µm wide (x = 4.0 µm, n = 30), comprising numerous, narrowly cylindrical to filiform, branched, septate paraphyses, not embedded in a gelatinous matrix. Asci 68–120 µm × 3.0–6.5 µm (x = 96.0 × 4.5 µm, n = 30), 8-spored, unitunicate, cylindrical, long pedicellate, tapering to the bulbose base, apically rounded with an apical ring. Ascospores 4.5–6.5 µm × 2.5–4.0 µm (x = 6.0 × 3.0 µm, n = 30), L/W 1.5–2.5 (x = 2.0, n = 30), uniseriate, ellipsoidal, hyaline, aseptate, straight, 2-guttulate, thin-walled, smooth-walled, without mucilaginous sheath or appendages. Asexual morph: Undetermined.</p> <p>Culture characteristics: Ascospores germinated on PDA within 24 hours, and germ tubes were produced from both ends of the ascospores. Colonies growing on PDA reaching a diameter of 20 mm after 24 days at 25 °C, rough, irregular, slightly raised, edge crenate, with both surfaces dark-gray in the margin and grayish-white towards the center, slowly growing, reverse taupe brown, without sporulation.</p> <p>Material Examined: CHINA, Sichuan province, Chengdu, Pengzhou county, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=103.79111&amp;materialsCitation.latitude=31.239166" title="Search Plazi for locations around (long 103.79111/lat 31.239166)">Huilonggou Scenic Area</a>, (31°14′21″ N, 103°47′28″ E), on a submerged decaying wood of undetermined host, 28 July 2021, Xian-Dong Yu (HKAS 124019, holotype; HUEST 22.0028, isotype); ex-type culture CGMCC 3.23639 (= UESTCC 22.0030).</p> <p>Notes: Xylochrysis aquatica fits well with the morphological characteristics of Xylochrysis in having globose ascomata, numerous paraphyses, cylindrical and long pedicellate asci, ellipsoidal and hyaline ascospores (Réblová et al. 2014). Xylochrysis aquatica is easily distinguished from the type species X. lucida by solitary, scattered, smaller ascomata (160–265 µm × 145–290 µm vs. 350–500 µm × 350–500 µm) without a layer of colored cells surrounded, longer asci (60–120 µm long vs. 59–73 µm long) and more rounded ascospores (L/W: 1.5–2.5 µm vs. 2.2–2.8 µm). Ascomata of X. lucida often aggregated or confluent in groups of 3–10 and surrounded by a golden yellow layer of cells. In addition, the ostiolar neck of X. lucida is short-beaked and distinctly longer (Réblová et al. 2014) than our new taxon, X. aquatica. The multi-gene (ITS-LSU-SSU- tef1-α -rpb2) phylogenetic analyses suggested that our isolate clustered together with the generic type X. lucida and formed a distinct lineage (100% ML; 1.00 PP) in Woswasiaceae. In addition, a nucleotide comparison of X. aquatica (CGMCC 3.23639) and X. lucida (CBS 135996) revealed 25 basepair (5 %) and 70 base-pair (7.2 %) differences in ITS (+ 5.8S) and rpb2, respectively (TABLE 2). Xylochrysis aquatica is introduced as a new species based on the moprhology and phylogeny evidences.</p> </div>	https://treatment.plazi.org/id/03D08792FFB221304E96569FFB8BF7BF	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Song, Jing-Yi;Yang, Yi;Yu, Xian-Dong;Dissanayake, Asha J.;Tian, Qing	Song, Jing-Yi, Yang, Yi, Yu, Xian-Dong, Dissanayake, Asha J., Tian, Qing (2023): Xylochrysis aquatica sp. nov. (Woswasiaceae) from freshwater habitats in Sichuan Province, China. Phytotaxa 587 (1): 31-38, DOI: 10.11646/phytotaxa.587.1.4, URL: http://dx.doi.org/10.11646/phytotaxa.587.1.4
