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Chrysogorgia ramificans Xu, Li, Zhan & Xu 2019
No full text<i>Chrysogorgia ramificans</i> Xu, Li, Zhan & Xu, 2019 <p>Figs. 46, 47</p> <p> <i>Chrysogorgia ramificans</i> Xu, Li, Zhan & Xu, 2019: 94–97, figs. 2–3.</p> <p> <b>Material examined.</b> MBM286861, station FX-Dive 223 (10°4′42″N, 140°15′12″E), a seamount (tentatively named as M7) on the Caroline Ridge, 1047m, 11 June 2019.</p> <p> <b>Description.</b> Colony typical bottlebrush-shaped and attached to a rocky substrate (Fig. 46 A). Specimen about 36 cm long and 15 cm wide in maximum with the holdfast not recovered (Fig. 46 B). Main stem about 1.5 mm in diameter at base and brown to yellow with metallic luster. Branching sequence 1/ 3L. Branches subdivided dichotomously, up to five orders with branching angle 80°–100°. Distance between adjacent branch 6–12 mm, orthostiche intervals 17–34 mm, the first internode of branch 8–27 mm and the terminal branchlets up to 31 mm. Polyps cylindrical, some of them curved, usually perpendicular to the branches, 1.0– 2.5 mm tall average 2 mm, and 0.5–1.0 mm wide (Fig. 46C, E, F). Polyps up to three and became very small on the first internode, up to four in medial internodes and up to five in terminal branchlets. Polyps absent in stem internodes and verruae absent. Tentacular part 0.5–1.0 mm long with tentacle rachis forming eight obvious columns (Fig. 46E).</p> <p>Rods and spindles in polyp body wall longitudinally or obliquely arranged, large and thick, rarely branched with many large and coarse warts, occasionally with irregular edges and shape, measuring 115–529 × 49–141 μm (Fig. 47D). Rods and spindles in tentacle rachis longitudinally arranged extending to the polyp neck, all covered with many large and coarse warts, some of them branched with irregular shape, measuring 135–459 × 23–106 μm (Fig. 47A). Scales in pinnules transversely arranged, small with finely toothed ends and sparse warts on surface, some of them curved or twisted with a medial contraction, occasionally nearly smooth, measuring 114–148 × 21–60 μm (Figs. 46D, 47B). Scales in coenenchyme arranged along to the branch, elongated and flat with dentate edges and a few large warts, some of them smooth and thick, measuring 223–671 × 35–118 μm (Figs. 46G, 47C).</p> <p> <b>Distribution and habitat.</b> The Kocebu Guyot in Magellan Seamounts, 1831 m (Xu <i>et al.</i> 2019); a seamount on the Caroline Ridge in the Western Pacific, 1047 m.</p> <p> <b>Remarks.</b> The colony of the Caroline specimen has a single bottlebrush-shaped branching part and smaller polyps compared with the holotype, and these differences may be caused by different growth stage or environment, and we treat as the intraspecific variation.</p>Published as part of <i>Xu, Yu, Zhan, Zifeng & Xu, Kuidong, 2023, Studies on western Pacific gorgonians (Anthozoa: Octocorallia, Chrysogorgiidae). Part 1: a review of the genus Chrysogorgia, with description of a new genus and three new species, pp. 1-107 in Zootaxa 5321 (1)</i> on page 76, DOI: 10.11646/zootaxa.5321.1.1, <a href="http://zenodo.org/record/8203414">http://zenodo.org/record/8203414</a>
Mandy Xinyuan Xu, piano, April 27, 2015
Get PDFThis is the concert program of the Mandy Xinyuan Xu, piano performance on Monday, April 27, 2015 at 6:30 p.m., at the Concert Hall, 855 Commonwealth Avenue. Works performed were Italian Concerto BWV971 by Johann Sebastian Bach, Sonata in F major, Op. 10 No. 2 by Ludwig van Beethoven, Kinderszenen Op. 15 by Robert Schumann, and Les collines d'Anacapri by Claude Debussy. Digitization for Boston University Concert Programs was supported by the Boston University Humanities Library Endowed Fund
Dataset for "Continuous beam steering by coherent light-by-light control of dielectric metasurface phase gradient"
No full textThis dataset contains all the data in manuscript "Continuous beam steering by coherent light-by-light control of dielectric metasurface phase gradient" by Fei He, Kevin F MacDonald and Xu Fang, which is accepted for publication on Optics Express on 8 September 2020.</span
Cryptomya (Venatomya) sinensis Xu 1987
No full textCryptomya (Venatomya) sinensis (Xu, 1987) Figure 5 A–F Tugonia sinensis Xu, 1987: 438, 441, fig. 1 b—Bernard et al., 1993: 107; Xu, 1997: 230; Lutaenko & Xu, 2008: 52, text-fig. 6 D; Xu & Zhang, 2008: 257, fig. 814; Xu, 2008: 589. Cryptomya (Venatomya) sinensis (Xu, 1987) — Huber, 2010: 766. Material examined. MBM 300741 (no. 84 M- 185) (Holotype) (1 articutate shell), Huian, Fujian Province, China, on July 17 th, 1984. Distribution and habitat. Recent. East China Sea, Yellow Sea, China. Type locality. Huian, Fujian Province, China. Habitat unknown. Diagnosis. Length to 20 mm; shell laterally slightly compressed, thin and fragile; umbo prominent, situated slightly posterior, prosogyrate; sculpture of commarginal growth lines on anterior and anterorcentral shell, and radial ribs posterocentral to posterior, becoming more pronounced towards the posterior; posterior area lacking radial ribs; chondrophore in left valve shallow; pallial sinus shallow and broad, extending slightly beyond the posterior adductor scar; pallial line thin or obscure. Remarks. The shell of this species is slightly compressed and its posterior end is not attenuated as is typical of Tugonia. Our present placement with Cryptomya (Venatomya) coincides with Huber (2010: 766); however, we do not agree with his synonymization with C. (V.) elliptica. Based on our examinations of type specimens of C. (V.) sinensis and material of C. (V.) elliptica, the shell of C. (V.) elliptica is much more compressed than that of C. (V.) sinensis. Comparing shells of similar size, C. (V.) sinensis (MBM 300741, Length = 19.0 mm) is much more fragile, the sculpture stronger, and the umbo much larger and more tumid than in C. (V.) elliptica (MBM 136090, Length = 18.8 mm) (Fig. 5 G).Published as part of Zhang, Jun-Long, Xu, Feng-Shan & Liu, Rui-Yu, 2012, The Myidae (Mollusca, Bivalvia) from Chinese waters with description of a new species, pp. 39-60 in Zootaxa 3383 on page 49, DOI: 10.5281/zenodo.28173
Istiochrysis Rosa & Xu, gen. nov.
No full textIstiochrysis Rosa & Xu, gen. nov. (Figs 1 A– 1 F, 2 A– 2 D, 3 A– 3 D, 4 A– 4 F) Type species: Istiochrysis ziliolii Rosa, Feng & Xu, sp. nov. Diagnosis. Istiochrysis Rosa & Xu, gen. nov. is similar to the Nearctic and Neotropical genus Caenochrysis Kimsey & Bohart, 1981, and the Palaearctic and Oriental genera Chrysidea Bischoff, 1913 and Trichrysis Lichtenstein, 1876. However, this new genus can be separated from Caenochrysis, Chrysidea and Trichrysis by male genitalia with extended longitudinal crest on aedeagus (Figs 1 A– 1 C); apex of aedeagus enlarged and folded laterally (Figs 1 A, 1 B) (not enlarged in the other genera and tapering in Caenochrysis); facial fovea between antennal socket and lower margin of eye hardly visible and shallowly depressed and finely punctate (Figs 2 A, 2 B) (usually deeply depressed in Caenochrysis); pronotum without sublateral carina (Fig. 3 A) (usually with sublateral carina in Trichrysis); fore wing discoidal cell with thin and completely sclerotised outer vein (faint in Chrysidea); apex of T 3 without teeth (laterally dentate and medially undulate in Chrysidea, tridentate in Trichrysis); S 2 with large, subrectangular, black spots extending to lateral margins (Fig. 3 B), somehow similar to those in the genus Praestochrysis Linsenmaier, 1968 (small, suboval, not extending to lateral margins in Caenochrysis; suboval and separated in Chrysidea (Fig. 3 D), subtriangular and medially fused or nearly so in Trichrysis (Fig. 3 C)) (Bohart & Kimsey 1982; Linsenmaier 1984; Rosa & Xu 2015; Rosa et al. 2016 a) (Fig. 2 D). Description. Male. Head broader than high. Scapal basin with shallow depression on each side between antennal socket and lower margin of eye; depression visible only under certain angle (Figs 2 A, 2 B); bottom of depression filled with micro-punctures and densely setose. Scapal basin topped by TFC (Figs 2 A, 4 B); scapal basin with white setae, especially along lateral sides (Fig. 2 A). F 1 l/w> 3; MS= 1 MOD. Genal carina developed from gena to mandible. Subgenal area well defined. Median ocellus not lidded. Vertex without posterior depression beneath posterior ocellus. Mandible unidentate. Pronotum nearly as long as mesoscutellum with deep lateral depression, without sublateral carina. Mesopleuron with large episternal sulcus and scrobal sulcus (Fig. 4 D); area between episternal sulcus and scrobal sulcus large and subtriangular. Metanotum with raised median area. Fore wing with thin but completely sclerotized outer veins of discoidal cell (Fig. 3 A). T 2 and T 3 with shallow median longitudinal carinae (Fig. 4 E). Apex of T 3 without teeth, but with shallow concavity, thus appearing bilobate (Fig. 4 F); pit row well developed with enlarged and partly fused pits (Fig. 4 F). Black spots on S 2 elongate, fused along lateral margins (Fig. 3 B) and distinctly separated mesally. Male genitalia with gonostyle of gonocoxa elongate and slender, aedeagus with enlarge longitudinal crest, well visible in lateral view (Fig. 1 C). Female. Unknown. Biology. Unknown. Distribution. China (Yunnan). Etymology. From Greek noun istion (= sail), referring to the unique subsidiary structure longitudinally placed on aedeagus, looking like a sail in lateral view. The gender is feminine.Published as part of Rosa, Paolo, Feng, Jun & Xu, Zai-Fu, 2016, Istiochrysis gen. nov., a new chrysidid genus from Oriental China (Hymenoptera, Chrysididae), pp. 591-597 in Zootaxa 4111 (5) on page 592, DOI: 10.11646/zootaxa.4111.5.5, http://zenodo.org/record/26366
Dryinus maculipennis He & Xu 2002
No full text1. Dryinus maculipennis He & Xu, 2002 (Plate 88E, F) Dryinus maculipennis He & Xu 2002: 282. Description of Male. Fully winged; length 4.3 mm. Head black, except mandible testaceous; antenna testaceous; mesosoma and metasoma black; legs yellow. Antenna filiform; antennal segments in following proportions: 3.5:2.5:10.3:7.0:6.3:6.0:6.0:5.3:4.3:6.0. Head dull, granulated and irregularly rugose; occipital carina complete, laterally not reaching eyes; frontal line very slender, complete; POL = 4; OL = 1.5; OOL= 5; OPL = 0.5; TL = 1.5; greatest breadth of posterior ocelli longer than OPL (4:0.5). Scutum dull, as sculptured as head. Notauli complete, posteriorly separated; minimum distance between notauli longer than POL (6:4). Scutellum shiny, with anterior third granulated and rest of surface unsculptured. Metanotum unsculptured, with anterior third reticulate rugose. Propodeum reticulate rugose, without transverse or longitudinal keels. Fore wing hyaline, with distal half darkened (Plate 88E); distal part of stigmal vein longer than proximal part (15:13); marginal cell open. Genitalia in plate 88F. Tibial spurs 1/1/2. Female. Unknown. Material examined. Type: holotype ♂: CHINA: Fujian, Mt. Meihuashan, 22.VII.1988, Junhua He leg. (ZJUC). Hosts. Unknown. Distribution. China (Fujian).Published as part of Xu, Zaifu, Olmi, Massimo & He, Junhua, 2013, Dryinidae of the Oriental region (Hymenoptera: Chrysidoidea), pp. 1-460 in Zootaxa 3614 (1) on page 308, DOI: 10.11646/zootaxa.3614.1.1, http://zenodo.org/record/527837
Anteon blanduscutum Xu, He & Rui 1996
No full text14. Anteon blanduscutum Xu, He & Rui, 1996 (Plate 19F) Anteon blanduscutum Xu, He & Rui 1996: 214; He & Xu 2002: 184; Xu et al. 2011 g (Suppl.): 4. Description of Female. Fully winged; length 1.8 – 2.1 mm. Head black, except mandible testaceous; antenna yellow (in specimen from China, Mt. Yinggeling, antenna testaceous, except segments 4 – 10 brown); mesosoma black, except posterior margin of pronotum brown-testaceous; metasoma black; legs grey-yellow. Antenna clavate; antennal segments in following proportions: 4: 2: 1.7: 1.5: 1.5: 1.5: 1.5: 1.5: 1.5: 2.3. Head shiny, punctate, unsculptured among punctures; clypeus and anterior half of face hairy; genae, posterior half of face and vertex smooth, unsculptured; frontal line complete; holotype with POL = 1.5; OL = 1.5; OOL = 2; OPL = 1.8; TL = 2.2; greatest breadth of posterior ocelli shorter than OPL (0.8: 1.8); occipital carina complete. Pronotum smooth, shiny, punctate, unsculptured among punctures; posterior surface of pronotum longer than anterior surface (3.3: 1.7), longer than half of scutum; pronotal tubercle reaching tegula. Scutum shiny, smooth, unsculptured. Notauli incomplete, reaching approximately 0.5 length of scutum. Scutellum and metanotum shiny, smooth. Propodeum with strong transverse keel between dorsal and posterior surface; dorsal surface reticulate rugose; posterior surface with two complete longitudinal keels, lateral areas granulated and slightly reticulate rugose, median area with anterior region granulated and posterior region sculptured by slight transverse keels. Fore wing hyaline, without dark transverse bands; distal part of stigmal vein much shorter than proximal part (1: 3.5). Protarsal segments in following proportions: 2: 0.8: 1: 3.5: 6.3. Enlarged claw (Plate 19 F) with proximal prominence bearing one long bristle. Segment 5 of protarsus (Plate 19 F) with one row of 15 – 19 lamellae, with basal part much shorter than distal part (11: 25); distal apex with three – four lamellae. Tibial spurs 1 / 1 / 2. Male. Unknown. Material examined. Type: holotype ♀: CHINA: Zhejiang, Mt. Tianmushan, 10–12.IX.1983, Xingsheng Wan leg. (ZJUC). Other material. CHINA: Fujian, Mt. Longqishan, 11.VIII.1991, Changming Liu leg., 1♀ (ZJUC); Fujian, Mt. Longqishan, 8.VII.1991, Changming Liu leg., 1♀ (ZJUC); Hainan, Mt. Yinggeling, 17–20.VII.2010, Huayan Chen leg., 1♀ (SCAU); Hainan, Baisha County, Jiujialing, 17–20.VII.2010, Huayan Chen leg., 3♀♀ (SCAU); Zhejiang, Taishun County, Wuyanling Provincial Nature Reserve, 7.VII–5.VIII.2005, 1♀ (ZJUC); Zhejiang, Lin'an, Mt. Qingliangfeng, 9.VIII.2005, Min Shi leg., 1♀ (SCAU). Hosts. Unknown. Distribution. China (Zhejiang, Fujian, Hainan).Published as part of Xu, Zaifu, Olmi, Massimo & He, Junhua, 2013, Dryinidae of the Oriental region (Hymenoptera: Chrysidoidea), pp. 1-460 in Zootaxa 3614 (1) on page 78, DOI: 10.11646/zootaxa.3614.1.1, http://zenodo.org/record/527837
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