1,725,179 research outputs found
Rubroboletus Kuan Zhao et Zhu L. Yang 2014, gen. nov.
No full textRubroboletus Kuan Zhao et Zhu L.Yang, gen. nov. Mycobank: MB 809235 Etymology: “ Rubro-” refers to the red color of the pileus, the surface of the hymenophore and the reticulum (or spots) on the stipe. Generic Type: Rubroboletus sinicus (W.F. Chiu) Kuan Zhao et Zhu L. Yang Basidioma stipitate-pileate with tubular hymenophore. Pileus hemispherical, convex or applanate, grayish, pinkish to red; context white, yellowish to lemon-yellow, bluing quickly when exposed. Hymenophore surface orange red to blood red, sometimes orange-yellow when mature, rapidly bluing when bruised; tubes yellow to olivaceous green, turning blue promptly when injured, then back to the original color slowly. Stipe central, covered with pinkish, red to brownish red reticula or spots. Pileipellis an interwoven trichoderm composed of more or less vertically arranged, sometimes gelatinized filamentous hyphae. Hymenophoral trama boletoid. Basidiospores smooth, subfusiform to ovoid-ellipsoid, slightly thick-walled. Pleuro - and cheilocystidia lageniform, thin-walled. Clamp connections absent. Amyloid reaction not observed.Published as part of Zhao, Kuan, Wu, Gang & Yang, Zhu L., 2014, A new genus, Rubroboletus, to accommodate Boletus sinicus and its allies, pp. 61-77 in Phytotaxa 188 (2) on pages 67-68, DOI: 10.11646/phytotaxa.188.2.1, http://zenodo.org/record/514715
Wynnella subalpina Q. Zhao, Zhu L. Yang & K. D. Hyde 2016, sp. nov.
No full textWynnella subalpina Q. Zhao, Zhu L. Yang & K.D. Hyde, sp. nov. Fig. 2 Index Fungorum number: 551515, Facesoffungi number: FoF 01055 Diagnosis:—Rabbit-ear shaped apothecia, with a tea brown to blackish brown hymenium, a red, reddish brown to greyish yellow receptacle surface, and a costate stipe. Paraphyses filiform 3–4 µm broad, and ascospores ellipsoid 19–23 × 10.5–12 μm. Etymology:— subalpina is proposed for its occurrence in subalpine regions in western China. Apothecia rabbit-ear shaped, 3–6 cm high, 1–4 cm broad, hymenium glabrous, tea brown to blackish brown, blackish brown when dry, margin rolled to hymenium when young, expanded at maturity; receptacle surface glabrous, red, reddish brown to greyish yellow, yellowish near the base. Stipe costate, glabrous, 0.5–1.5 × 0.5–2 cm, narrowing to base, light yellow to yellowish. Medullary excipulum 400–490 µm broad, of textura intricata, hyaline, composed of 2.5–5 µm broad hyphae, J-. Ectal excipulum 100–150 µm broad, of textura angularis, pale yellow, lightly encrusted with pale brown crystals, end cells 30–60 × 10–20 μm, J-. Asci arising from croziers, 8-spored, cylindrical to clavate, with apex rounded, 330–390 × 17–23 µm. Paraphyses filiform, 3–4 µm broad, brown, slightly short or exceeding the asci, hyaline in Melzer's reagent, light blue in cotton blue, enlarged apex 4–6 µm broad, J-. Ascospores [60/2/2, in H 2 O] 19–23 × 10.5–12 μm [Q = 1.32–1.58, Q = 1.47 ± 0.06)], ellipsoid, smooth-walled under the light microscope. Odor unique and strong when dried, but not detected when fresh. Habitat and distribution:—Solitary to scattered on the ground or moss, under Picea spp. forest. Only known from high altitude localities in western China. Typification:— CHINA. Tibet, Riwoqe County, on road (highway 317) from Riwoqe to Dingqing, 12 August 2004, Zhu L . Yang 4371 (holotype, HKAS 45750!). Additional material examined:— CHINA. Tibet, Riwoqe County, on road (highway 317) from Riwoqe to Dingqing, 12 August 2004, Zhu L . Yang 4371 (isotype, FH 00301682!), Bomi County, on moss under Picea spp. forest, alt. 3600 m, 16 August 2014, Q . Zhao 2110 (HKAS 78940!); Sichuan Province, Jiuzhaigou County, on the ground, under Picea spp forest, alt. 3000 m, 20 June 2014, Q . Zhao 2050 (HKAS 87730!).Published as part of Zhao, Qi, Brooks, Siraprapa, Zhao, Yong-Chan, Yang, Zhu L. & Hyde, Kevin D., 2016, Morphology and phylogenic position of Wynnella subalpina sp. nov. (Helvellaceae) from western China, pp. 41-48 in Phytotaxa 270 (1) on pages 44-46, DOI: 10.11646/phytotaxa.270.1.4, http://zenodo.org/record/478434
Rubroboletus Kuan Zhao et Zhu L. Yang 2014
No full textKey to the species of Rubroboletus 1 Pileus shiny when dry and strongly viscid when wet; pileal surface turning dark blue when bruised.............................................2 1 Pileus not shiny when dry, only slightly viscid when wet; pileal surface turning dark red or unchanging when bruised................3 2 Pileal surface scarlet to tinged ochraceous when mature; surface of the hymenophore blood red to dark red when mature; context pale yellow; in Europe, also reported from North and Central America........................................................................... R. dupainii 2 Pileal surface blood red to dark red when mature; surface of the hymenophore orange red when mature; context whitish to cream-colored; in East Asia............................................................................................................................................ R. latisporus 3 Pileal surface glabrous; spores subfusiform, with a conspicuous suprahilar depression; in North and Central America and Europe............................................................................................................................................................................................................4 3 Pileal surface felty-tomentose; spores ovoid-ellipsoid, with an inconspicuous suprahilar depression; in East Asia.......... R. sinicus 4 Context yellowish to pale yellow when mature; stipe club-shaped or sub-cylindrical.....................................................................5 4 Context whitish to white when mature; stipe usually strongly bulbously swollen at the base.......................................... R. satanas 5 Both the context of the cap and the stipe becoming blue when injured............................................................................................6 5 Context of the cap becoming blue but that of the stipe unchanging when injured.................................................. R. rhodoxanthus 6 Pileal surface unchanging when bruised; odor of hey or not distinct; taste slightly acid.................................................................7 6 Pileal surface turning dark red when bruised; odor of overripe fruit; taste sweet............................................... R. rhodosanguineus 7 Stipe covered with red to dark red reticula; odor of hey; in coniferous forests, such as Picea spp. and Abies spp.......................................................................................................................................................................................................... R. rubrosanguineus 7 Stipe covered with pink reticula; odor not distinct; in broad-leaved forests, such as Quercus spp......................... R. pulchrotinctusPublished as part of Zhao, Kuan, Wu, Gang & Yang, Zhu L., 2014, A new genus, Rubroboletus, to accommodate Boletus sinicus and its allies, pp. 61-77 in Phytotaxa 188 (2) on page 72, DOI: 10.11646/phytotaxa.188.2.1, http://zenodo.org/record/514715
Amanita orientisororia T. Bau & Zhu L. Yang 2021, sp. nov.
No full text<i>Amanita orientisororia</i> T. Bau & Zhu L. Yang, <i>sp. nov.</i> (Figs. 2, 3) <p>MycoBank number:841290</p> <p>Diagnosis:—Basidiomata small. Pileus 20–60 mm in diam, surface white (1A1) to greyish white (1B1); white (1A1) volval remnants on pileal surface conical to subconical to pyramidal. Stipe 40–70 mm long, 7–12 mm diam., subcylindrical, densely covered with concentrically arranged appressed to recurved greyish white (1B1) somewhat milk white (1A2) squamules. Annulus superior, membranous, white (1A1) to greyish white (1B1). Basidiospores broadly ellipsoid to ellipsoid, amyloid, 9–13 (15) × (6) 7–9.5 (10) μm. Clamps common.</p> <p> Etymology:— <i>orientisororius</i>, referring to its smaller basidiomata occurring in East Asia in comparison with those of <i>A. vittadinii</i>, a putatively related species found in Europe and North Africa.</p> <p> Types:— CHINA. Inner Mongolia Autonomous Region: Xarmoron Park, Tongliao City, 43° 38′ 15″ N, 122° 16′ 2″ E, elev. 183m, 10 Aug. 2018, <i>Tolgor Bau</i>, HMJAU59015 (holotype!), same location, 43° 37′ 52″ N, 122° 15′ 33″ E, elev. 180m, 18 Aug. 2018, <i>Tolgor Bau</i>, HMJAU59016 (paratype!).</p> <p>Description:—Basidiomata (Fig. 2, 3) small, rarely medium-sized. Pileus 20–60 mm in diam., convex to applanate, surface white (1A1) to greyish white (1B1); volval remnants on pileal surface conical to subconical to pyramidal, up to 2–3 mm in height and 3–4 mm in diam., white (1A1) to milk white (1A2), upper half often pale to yellowish white (2A2); margin non-striate, appendiculate; trama white (1A1), unchanging when injured. Lamellae free or nearly free, white, milk white (1A2) to yellowish white (2A2), lamellulae attenuate. Stipe 40–70 mm long, 7–12 mm diam., subcylindrical, white (1A1) to pale yellowish white (2A2), densely covered with concentrically arranged appressed to recurved pale yellowish white (2A2) squamules; context white (1A1), unchanging when injured; stipe base nearly cylindrical or attenuate downwards, 7–14 mm diam., upper half covered with floccose, white (1A1) to greyish white (1B1) to yellowish white (2A2) squamules. Annulus superior, membranous, white (1A1) to greyish white (1B1), upper surface striate, lower surface often with floccose, greyish white (1B1) to milk white (1A2) warts. Odor unknown.</p> <p>Lamellar trama bilateral. Mediostratum composed of abundant fusiform to clavate inflated cells (16–23 μm wide), mixed with abundant filamentous hyphae (5–10 μm wide), lateral stratum made up of abundant clavate to subclavate inflated cells (14–25 μm wide), mixed with 4–11 μm wide filamentous hyphae. Basidia (Fig.4) 35–47 × 9–12.5 μm, clavate, 4– or 2– spored; sterigmata 4–6 μm long. Basidiospores (Fig.4) [80/4/3] (8.5) 9–13 (15) × (6) 7–9.5 (10) μm, Q = (1.20) 1.22–1.54 (1.60), Qm = 1.38 ± 0.10, broadly ellipsoid to ellipsoid, amyloid, slightly thickwalled, colorless and hyaline, smooth. Lamellar edge appearing as a sterile strip, composed of numerous subglobose to clavate or broadly clavate inflated cells, usually single and terminal or in chains of 2–3, thin–walled, colorless, hyaline; filamentous hyphae rare, thin–walled, hyaline or with yellowish contents. Volval remnants on pileus (Fig. 4) composed of vertically arranged elements: inflated cells very abundant to dominant, subfusiform to elongate-ellipsoid, occasionally subglobose, 35–110 × 15–30 μm, colorless and hyaline; filamentous hyphae scattered to locally abundant, 3–6 μm wide; vascular hyphae rare 3–7μm wide. Pileipellis composed of subradially arranged cylindrical hyphae 4–13 μm wide, barely gelatinized. Stipe trama composed of longitudinally arranged elements: inflated cells dominant, often in short chains, sometimes terminal, 150–250 × 10–30 μm; filamentous hyphae 3–7 μm wide, scattered, branching and anastomosing, occasionally clamped; vascular hyphae rare, 3–10 μm wide. Clamps present in all parts of basidiomata, but more common in lamellae.</p> <p>Habitat and distribution:—Solitary or scattered on grass lawn or sand dunes; occurring in summer and fall; known from Northeastern China.</p> <p>Additional specimen examined:— CHINA. Inner Mongolia Autonomous Region: Xarmoron Park, Tongliao City, 43° 38′ 21″ N, 122° 16′ 7″ E, elev. 188m, 5 Sep. 2021, Tolgor Bau, HMJAU59017.</p>Published as part of <i>Liu, Xiaoliang, Bau, Tolgor & Yang, Zhu L., 2021, A new saprotrophic species of Amanita (Amanitaceae, Agaricales) from Inner Mongolia, China, pp. 284-292 in Phytotaxa 527 (4)</i> on pages 287-290, DOI: 10.11646/phytotaxa.527.4.6, <a href="http://zenodo.org/record/5766259">http://zenodo.org/record/5766259</a>
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Retiboletus (Nigroretiboletorum) Yan C. Li & Zhu L. Yang 2022, subg. nov.
No full textRetiboletus subg. Nigroretiboletorum Yan C. Li & Zhu L. Yang, subg. nov. MycoBank: 845727 Etymology: the epithet refers to species of this subgenus with gray, grayish-brown or black colored pileus. Type: Retiboletus griseus (Frost in Peck) Binder & Bresinsky, Feddes Repert 113(1–2): 37 (2002). Diagnosis: Retiboletus subg. Nigroretiboletorum differs from R. subg. Retiboletus by its white, grayish white or pallid gray to cream context, unchanging or staining pale brown, brown, blackish brown, or ferrugineous when injured, and the white to grayish white or grayish pink to dark purple hymenophore, which is unchanging or staining pale brownish, brown, dark brown or ferrugineous when injured. Description: Basidiomata small to medium-sized. Pileus subhemispherical to convex, sometimes applanate; surface dry, densely subtomentose, grayish brown, pale brown to blackish brown or grayish white to blackish; margin incurved; context white, grayish white or pallid gray to cream, unchanging or staining pale brown, brown, blackish brown, or ferrugineous when injured. Hymenophore poroid, adnate or slightly depressed around apex of stipe; pores angular to roundish, white to grayish white or grayish pink to dark purple, unchanging or staining brownish, brown, dark brown or ferrugineous when injured; tubes grayish white or gray-white when young, then gray, grayish yellow, or lilac, unchanging or staining pale brown, brown, or dark brown when injured. Stipe central, subcylindrical, solid, usually flexuous; surface dry, grayish white, gray to blackish, but with yellow to gray-yellow tinge downwards; surface often covered with concolorous or much darker reticulum, sometimes without indistinct reticulum; context white, cream to grayish on the upper part, but yellowish to cream downwards, unchanging or staining pale brown, brown, blackish brown, ferrugineous or indistinct blue when injured; annulus absent. Basal mycelium white or cream. Odor indistinct. Basidiospores smooth, subfusiform to ellipsoid. Cheilo- and pleurocystidia subfusiform or fusiform, abundant. Pileipellis a trichoderm composed of more or less vertically arranged, or sometimes slightly interwoven hyphae. Clamp connections absent in all tissues. Ecology and distribution: Known from North and Central America and East Asia, associated with plants of the families Fagaceae and Pinaceae. Currently known species: Retiboletus ater, R. brunneolus, R. fuscus, R. griseus, R. nigerrimus (R. Heim) Manfr. Binder & Bresinsky, R. nigrogriseus, R. pseudogriseus, R. sinogriseus, R. vinaceipes B. Ortiz, Lodge & T.J. Baroni, R. zhangfeii and the newly described species R. cyanescens.Published as part of Li, Jin, Wang, Zhen, Liu, En-De, Yang, Zhu L. & Li, Yan-Chun, 2022, Morphological and molecular data reveal Retiboletus cyanescens sp. nov. and the new subgenus Nigroretiboletorum (Boletaceae), pp. 232-242 in Phytotaxa 572 (3) on page 237, DOI: 10.11646/phytotaxa.572.3.2, http://zenodo.org/record/732221
- …
