140,330 research outputs found
Hauptenia tripartita Rahman, Kwon & Suh, 2012, sp. nov.
No full textHauptenia tripartita sp. nov. (Figs 23–33) Description. Body length (from apex of vertex to tip of tegmen): male 4.8–5.1 mm (N= 22), female 5.0– 5.5 mm (N= 21). Tegmen length: male 4.2–4.5 mm (N= 22), female 4.5–4.9 mm (N= 21). Coloration. General color yellowish brown. Vertex (Fig. 23), pronotum, frons (Fig. 24), clypeus and ventral aspect of thorax yellow. Rostrum yellow except apex fuscous. Eyes blackish brown, ocelli pale yellow. Mesonotum (Fig. 23) yellowish brown. Tegmen (Fig. 26) yellowish brown, often with white waxy powder, longitudinal veins brown. Wings (Fig. 27) grayish white, veins brown. Legs yellow. Abdomen yellowish brown with lateral margin tinged with dark brown or red. Genital segment yellow brown. Head and thorax. Head with eyes distinctly narrower than pronotum (1: 1.54), short. Vertex in dorsal view broadly trapezoidal, wider between basal angles than long in middle line (3.28: 1), apical margin distinct, transversely carinate, posterior margin concave, lateral carinae slightly elevated, disk slightly depressed, median carina very feeble. Frons longer in middle line than widest part (1.84: 1), shorter than clypeus (1: 1.1), disc depressed in entire length, lateral carinae strongly keeled. Clypeus distinctly carinated medially. Apical segment of rostrum longer than wide. Genae with projecting ear-shaped carinae under antennae. Antennae short, pedicel oval-shaped, flagellum originated from apical point. Lateral ocelli adjacent to eyes and antennal socket. Median length of pronotum about equal to that of vertex (1: 1), anterior margin between eyes broadly convex, length behind eyes slightly greater than median length, disc with lateral and median carinae absent, oblique transverse carinae strongly elevated. Mesonotum dorsally elevated, depressed at posterior end, median longitudinal carinae slightly elevated, lateral carinae feeble. Tegmen with Sc with 2 sector, subcostal cell long, M with 3 sectors, tegmen longer than widest part (2.89: 1). Wings with R reaching to apical margin, CuA with 3 terminals. Spinal formula of hind leg 7 – 6 – 5. Male genitalia. Anal segment (Figs 32, 33) moderately long, usually with apex not reaching level of apex of genital styles, broader at base in dorsal view than apex about 2.21: 1, longer (including anal styles) than widest part at base (2: 1), lateral margin slightly concave medially; anal styles slightly turned ventrad. Pygofer (Fig. 33) in profile distinctly shorter dorsally than ventrally, dorsocaudal portion without any process. Aedeagus (Figs 28, 29) with shaft gently curved; flagellum of aedeagus with 4 lobes and 6 processes, among 4 lobes, two of which short, flap and oval-shaped, with small dentate margin, medium lobe with apicoventral portion produced into process directing dorsad, and the other one elongate, wide, tripartite, reaching nearly to base of aedeagus; flagellum at base in left lateral view (Fig. 28) with three processes arising from left: one long and the other two short, all directed cephalad; in right lateral view (Fig. 29) with three processes: one long, directed ventrad, other two short, directed dorsad. Genital styles (Figs 30, 31) symmetrical, short and stout, apical margin obliquely truncate, dorsoapical process indistinct, dorsobasal projection reaching to level of apical margin of styles. Type material. Holotype male, KOREA: Palgongsan, Gyeongsangbuk–do Province, 24 Aug. 1980, Y.J. Kwon (KNU). Paratypes: KOREA: 10 males, same data as holotype; 2 males, same data as holotype except 20 Sep. 1980; 4 males, 7 females, Daegu city, Gyeongsangbuk–do Province, 6 Sep. 1981, Y.J. Kwon; 1 male, 1 female, Gachangdam, Deagu, Gyeongsangbuk–do Province, 5 Aug. 2005, Y.J. Kwon; 2 males, 2 females, Sambongsan, Gyeongsangbuk–do Province, 14 Aug. 1997, Y.J. Kwon; 1 male, Juwangsan, Gyeongsangnam–do Province, 28 Jul. 1984, Y.J. Kwon; 1 male, 1 female, Is. Hongdo, Jeollanam–do Province, 11 Aug. 1981, Y.J. Kwon; 1 female, Is. Heuksando, Jeollanam–do Province, 15 Aug. 1977, Y.J. Kwon; 1 female, Myeongjisan, Gyeonggi–do Province, 22 Aug. 2001, Y.J. Kwon; 1 female, Hwanghaksan, Gyeongsangbuk–do Province, 14 Sep. 1991, Y.J. Kwon; 1 female, Hakkasan, Gyeongsangbuk–do Province, 21 Aug. 1998, Y.J. Kwon; 2 females, Waryongsan, Gyeongsangnam–do, 11 Aug. 1999, Y.J. Kwon; 2 females, Chonhwangsan, Jeollabuk–do Province, 12 Sep. 1999, Y.J. Kwon; 1 female, Sobo, Gyeongsangbuk–do Province, 6 Aug. 2010, Y.J. Kwon; 1 female, Songnisan, Chungcheongbuk–do Province, 9 Sep. 2001, Y.J. Kwon (KNU). Etymology. The Latin word ‘ tripartita ’ means ‘divided into three parts’. Named after an elongate and tripartite lobe of flagellum of aedeagus reaching nearly to base of aedeagus. Host plants. Unknown. Distribution. Korea. Remarks. This species is similar to H. magnifica (Yang & Wu) but can be distinguished from the latter by the shape of aedeagus, especially by the shape of an elongated, wide, and tripartite lobe of flagellum reaching near to base of aedeagus.Published as part of Rahman, Mohammad Atikur, Kwon, Yong Jung & Suh, Sang Jae, 2012, Two newly recorded genera and three new species of the tribe Cedusini (Hemiptera: Fulgoromorpha: Derbidae) from Korea, pp. 59-68 in Zootaxa 3261 on pages 66-68, DOI: 10.5281/zenodo.28071
Produsa koreana Rahman, Kwon & Suh, 2012, sp. nov.
No full textProdusa koreana sp. nov. (Figs 1–11) Description. Body length (from apex of vertex to tip of tegmen): male 4.8 –5.0 mm (N=08), female 5.0– 5.4 mm (N= 10). Tegmen length: male 4.2–4.5 mm (N=08), female 4.5–4.9 mm (N= 10). Coloration. General color dark brown. Vertex (Fig. 1) dark brown at middle, lateral and transverse carinae golden yellow. Frons and clypeus (Fig. 2) dark brown with median line and lateral carinae yellow. Rostrum yellowish brown with apex fuscous. Genae yellowish brown, projecting with pale yellow ear-shaped lobe under antennae. Eyes blackish brown, ocelli pale yellow. Antennae brown to dark brown at base, yellowish brown at apex. Pronotum (Fig. 1) dark brown with margins and transverse carinae golden yellow. Mesonotum (Fig. 1) blackish brown. Tegmen (Fig. 4) brown to dark brown, with white waxy powder, longitudinal veins dark brown to black. Wings (Fig. 5) grayish white, veins pale black. Thorax with ventral areas brown to fuscous. Legs yellow, femura and tarsi brown. Abdomen dark brown, with lateral margin and posterior of margin of each segment yellowish brown. Genital segment yellowish brown to dark brown. Head and thorax. Head with eyes distinctly narrower than pronotum (1: 1.5), short. Vertex in dorsal view broadly trapezoidal, wider between basal angles than long in middle line (5.4: 1), apical margin distinctly carinate, posterior margin concave, lateral carinae slightly elevated, disk slightly depressed, median carina very feeble. Frons longer in middle line than widest part (1.57: 1), shorter than clypeus (1: 1.2), disc depressed in entire length, lateral carinae strongly keeled. Clypeus distinctly carinate medially. Apical segment of rostrum longer than wide. Genae with projecting ear-shaped carinae under antennae. Antennae short, pedicel subglobose, flagellum originated from apical point. Lateral ocelli adjacent to eyes and antennal socket. Pronotum with median length about equal to that of vertex (1: 1), anterior margin between eyes broadly convex, length behind eyes slightly greater than median length, disc with lateral and median carinae absent, oblique transverse carinae strongly elevated. Mesonotum dorsally elevated, depressed at posterior end, median longitudinal carinae slightly elevated, lateral carinae very feeble. Tegmen with Sc with 1 sector, subcostal cell long, M with 4 sectors, tegmen longer than widest part (2.68: 1). Wings with R reaching to apical margin, CuA with two terminals. Spinal formula of hind leg 6 – 5 – 5. Male genitalia. Anal segment (Fig. 9) moderately long, usually with apex not reaching level of apex of genital styles, broader at base in dorsal view than apex about 1.77: 1, longer (including anal styles) than widest part at base (2.03: 1), lateral margin slightly concave medially; anal styles directed caudad. Pygofer (Fig. 8) in profile distinctly shorter dorsally than ventrally, at dorsocaudal portion produced caudad in small process, directed caudad. Aedeagus (Figs 6, 7) with shaft gently curved, with 3 short processes at apex, most part of apical processes visible in both left and right lateral view; flagellum with 2 lobes, dorsal one armed with a small process at dorsal median portion, apex bifurcate, unequally branched, outer process shorter than inner one (1: 2.10), inner process comparatively wide with lobe-like extension at middle, ventral lobe with apex equally branched, both processes almost same in length. Oval and flap-like process present at base of flagellum in left lateral view (Fig. 6). Genital styles (Figs 10, 11) symmetrical, slender, apical margin acute, in caudal view turned mesad acutely, inner margin of genital styles in ventral view well developed and lobed, dorsobasal projection basad, with apical process widening to base, basal process visible in profile. Type material. Holotype male, KOREA: Sambongsan, Gyeongsangbuk–do Province, 14 Aug. 1997, Y.J. Kwon (KNU). Paratypes: KOREA: 1 female, same data as holotype; 1 male, Sonuisan, Gyeongsangbuk–do Province, 16 Aug. 1997, Y.J. Kwon; 2 females, Gunwi, Gyeongsangbuk–do Province, 17 Aug. 2011, Y.J. Kwon; 1 male, 1 female, Hakkasan, Gyeongsangbuk–do Province, 21 Aug. 1998, Y.J. Kwon; 1 male, Hwanghaksan, Gyeongsangbuk–do Province, 27 Aug. 1985, Y.J. Kwon; 2 males, 1 female, Palgongsan, Gyeongsangbuk–do Province, 6 Sep. 1985, Y.J. Kwon; 1 male, 1 female, Dansan Myeon, Daegu, Gyeongsangbuk–do Province, 13 Aug. 1983, Y.J. Kwon; 1 male, 3 females, Unjangsan, Jeollabuk–do Province, 28 Aug. 1998, Y.J. Kwon; 1 female, Songnisan, Chungcheongbuk–do Province, 9 Sep. 2001, Y.J. Kwon (KNU). Etymology. The species is named for its occurrence in Korea. Host plants. Unknown. Distribution. Korea. Remarks. This species is similar to P. cubica (Yang & Wu) but differs from the latter in the aedeagus at apex in left lateral view with only 2 processes visible among 3 processes (aedeagus at apex in left lateral view with all 3 processes visible in cubica); dorsal lobe of flagellum of aedeagus unequally branched at apex and ventral lobe equally branched (in cubica, dorsal lobe of flagellum of aedeagus equally branched at apex and ventral lobe unequally branched); outer process of dorsal lobe of flagellum of aedeagus at apex shorter than inner one about 1: 2.10, inner process comparatively wide with lobe-like extension at middle (in cubica, outer process of dorsal lobe of flagellum of aedeagus at apex longer than inner one about 1.45: 1, inner process comparatively narrow, without a lobe-like extension at middle); and base of flagellum in left lateral view with oval and flap-like process (absent in cubica).Published as part of Rahman, Mohammad Atikur, Kwon, Yong Jung & Suh, Sang Jae, 2012, Two newly recorded genera and three new species of the tribe Cedusini (Hemiptera: Fulgoromorpha: Derbidae) from Korea, pp. 59-68 in Zootaxa 3261 on page 62, DOI: 10.5281/zenodo.28071
On the Erdős-Pósa property for long holes in C_4-free graphs
No full textWe prove that there exists a function f(k)=O(k^2logk) such that for every C4-free graph G and every k∈N, G either contains k vertex-disjoint holes of length at least 6, or a set X of at most f(k) vertices such that G−X has no hole of length at least 6. This answers a question of Kim and Kwon [Erdős-Pósa property of chordless cycles and its applications. JCTB 2020
Hauptenia palgongsanensis Rahman, Kwon & Suh, 2012, sp. nov.
No full textHauptenia palgongsanensis sp. nov. (Figs 12–22) Description. Body length (from apex of vertex to tip of tegmen): male 4.8–5.2 mm (N= 10), female 5.1–5.6 mm (N= 24). Tegmen length: male 4.3–4.6 mm (N= 10), female 4.5 –5.0 mm (N= 24). Coloration. General color dark brown. Vertex (Fig. 12), pronotum, frons (Fig. 13), clypeus and ventral aspect of thorax bright yellow. Rostrum yellow except apex fuscous. Eyes blackish brown, ocelli pale yellow. Mesonotum (Fig. 12) dark brown to black, with median carina dark brown and lateral carinae very shortly yellow near pronotum. Tegmen (Fig. 15) dark brown to black, often covered with whitish bloom that contributes to a bluish appearance, longitudinal veins dark brown to black. Wings (Fig. 16) grayish white, vein dark brown. Legs yellow, apex of tarsi fuscous. Abdomen dark brown except posterior margin of each segment yellow. Genital segment brown to dark brown. Head and thorax. Head with eyes distinctly narrower than pronotum (1: 1.51), short. Vertex in dorsal view broadly trapezoidal, wider between basal angles than long in middle line (3.4: 1), apical margin distinct, transversely carinate, posterior margin slightly concave, lateral carinae slightly elevated, disk slightly depressed. Frons longer in middle line than widest part (1.48: 1), shorter than clypeus (1: 1.46), disc depressed in entire length, lateral carinae strongly keeled. Clypeus distinctly carinate medially. Apical segment of rostrum longer than wide. Genae with projecting ear-shaped carinae under antennae. Antennae short, pedicel subglobose, flagellum originated from apical point. Lateral ocelli adjacent to eyes and antennal socket. Median length of pronotum less than that of vertex (1: 1.25), anterior margin between eyes broadly convex, length behind eyes slightly greater than median length, disc with lateral and median carinae absent, oblique transverse carinae strongly elevated. Mesonotum dorsally elevated, depressed at posterior end, median longitudinal carinae slightly elevated, lateral carinae near pronotum very shortly visible then feeble posteriorly. Tegmen with Sc with 2 sectors, subcostal cell long, M with 4 sectors, tegmen longer than widest part (2.77: 1). Wings with R reaching to apical margin, CuA with 3 terminals. Spinal formula of hind leg 7 – 6 – 5. Male genitalia. Anal segment (Figs 21, 22) moderately long, usually with apex not reaching level of apex of genital styles, broader at base in dorsal view than apex about 1.75: 1, longer (including anal styles) than widest part at base (1.78: 1), dorsolateral margin slightly convex medially; anal styles strongly tumed ventrad. Pygofer (Fig. 21) in profile distinctly shorter dorsally than ventrally, dorsocaudal angle not produced. Aedeagus (Figs 17, 18) with shaft curved, flagellum with 4 lobes and 4 processes; among 4 lobes, two of which short, flap and ovalshaped, with small dentate margin, extending half length of other lobes, and the other 2 lobes elongate with left one curved dorsad near apex and right one with dorsoapical angle stout, apical margin obliquely truncate, dorsocaudal angle produced into process; flagellum at base in left lateral view (Fig. 17) with one process arising from left, the other from middle and shorter than left one (1: 1.96), middle process visible from both sides, directed cephalad; in right lateral view (Fig. 18) with two processes, one short at base, directed dorsad, visible from both sides, the other long, arising from the right, as long as left process, directed cephalad. Genital styles (Figs 19, 20) symmetrical, short and stout, apical margin obliquely truncate, dorsocaudal angle produced into finger-shaped process, dorsobasal projection distad, apical hook broad at base. Type materials. Holotype male, KOREA: Palgongsan, Gyeongsangbuk–do Province, 24 Aug. 1980, Y.J. Kwon (KNU). Paratypes: KOREA: 5 males, 15 females, same data as holotype; 1 male, 1 female, Yecheon, Gyeongsangbuk–do Province, 3 Sep. 1997, Y.J. Kwon; 1 female, same locality, 20 Sep. 1980, Y.J. Kwon; 2 males, Gunwi, Gyeongsangbuk–do Province, 17 Aug. 2011, Y.J. Kwon; 1 female, Hakkasan, Gyeongsangbuk–do Province, 21 Aug. 1998, Y.J. Kwon; 1 male, 2 females, Naejangsan, Jeollabuk–do Province, 14 Aug. 1981, Y.J. Kwon; 1 female, Hwaaksan, Gyeongsangnam-do Province, 6 Aug. 1998, Y.J. Kwon; 3 females, Chonhwangsan, Jeollabuk–do Province, 12 Sep. 1999, Y.J. Kwon (KNU). Etymology. This species is named after the collection site of the holotype, Palgongsan (Mt. Palgong) in Korea. Host plants. Unknown. Distribution. Korea. Remarks. This species is similar to H. fellea (Yang & Wu) but differs from the latter in the mesonotum dark brown to black (mesonotum yellow in fellea); frons shorter in middle line than clypeus about 1: 1.46 (frons shorter in middle line than clypeus about 1: 1.10 in fellea); tegmen with vein M with 4 sectors (tegmen with vein M 3 with sectors in fellea); flagellum of aedeagus with 4 lobes, two of which short, flap and oval-shaped, with small dentate margin, extending half length of other lobes, and the other 2 lobes elongated (flagellum of aedeagus with 2 elongated lobes in fellea); flagellum at base in left lateral view with one process arising from left, the other from middle and shorter than left one about 1: 1.96, middle process visible from both sides (in fellea, flagellum at base in left lateral view with one process arising from left, the other from middle and as long as left one about 1: 1, middle process visible only from left side).Published as part of Rahman, Mohammad Atikur, Kwon, Yong Jung & Suh, Sang Jae, 2012, Two newly recorded genera and three new species of the tribe Cedusini (Hemiptera: Fulgoromorpha: Derbidae) from Korea, pp. 59-68 in Zootaxa 3261 on page 65, DOI: 10.5281/zenodo.28071
Vekunta fuscolineata Rahman, Kwon & Suh, 2012, sp. nov.
No full textVekunta fuscolineata sp. nov. (Figs 1−12) Description. Body length (including forewing): male 6.2−6.5 mm (N=08), female 7.0− 7.2 mm (N=08); forewing length: male 5.1−5.4 mm (N=08), female 5.9−6.1 mm (N=08). Coloration. General color pale brownish yellow, with dark brown lining along claval and costal area (Fig. 1). Vertex (Fig. 1) with yellow sensory pits, lateral and apical carinae brown to dark brown. Frons (Fig. 2) yellow with lateral margins dark brown. Clypeus yellow to yellowish brown. Rostrum yellow with apex fuscous. Genae yellow. Eyes black, ocelli yellow. Antennae (Fig. 3) yellow brown. Pronotum (Fig. 1) golden yellow. Mesonotum (Fig. 1) distinctly dark brown on each side, golden yellow in middle. Tegmina smooky white to smooky brown except costal and clavus margins from base to near apex, dark brown, longitudinal veins pale white. Wings waxy white with pale brown veins. Thorax with ventral areas yellowish brown, mesopleura with an oval black spot. Legs pale yellow. Each segment of abdomen brown dorsally with dark brown margin posteriorly, ventrally yellow. Genital segment yellowish brown. Head and thorax. Head with eyes distinctly narrower than pronotum (1: 1.51). Vertex wider at base than long in middle line (1.53: 1), apex narrower than base (1: 1.43), straightly projecting before eyes, excavated medially, lateral margin prominent and flate with numerous sensory pits, posterior margin concave. Frons longer in middle line than wide at widest part (1.79: 1), width at level of ocelli narrower than widest part (1: 1.14), length shorter than clypeus (1: 1.25), disc depressed in entire length, each of lateral margin strongly keeled with a series of granules, median carina absent. Clypeus distinctly carinate medially. Apical segment of rostrum longer than wide. Antennae short, second antennomere oval, flagellum originated from apical point, subantennal process short. Eyes semicircular; ocelli present, adjacent to eyes. Median length of pronotum less than that of vertex (1: 1.87), anterior margin between eyes convex, length behind eyes greater than median length (1.6: 1), median carinae distinct, transverse carinae strongly elevated, ventral and lateral margins not foliately raised. Mesonotum as long as broad, slightly convex, in lateral view slightly raised above vertex, longitudinal median carina distinct, lateral carinae weakly developed, posterior end triangularly depressed. Tegmina (Fig. 5) narrow, 3.3 times as long as widest part, clavus closed, claval veins with a prominent ridge of setiferous tubercles, base of costal margin curved inward, costal margin granulated, R fused with M for short distance. Wings (Fig. 6) slightly shorter than forewing. Male genitalia. Anal segment (Fig. 9) in lateral profile long, wider at basal half, slender and curved on apical half, in dorsal view (Fig. 10) longer in middle line than widest part at base (2.53: 1), lateral margin subparallel, apex rounded. Aedeagal shaft somewhat curved, in right lateral view (Fig. 7), with two processes at middle, one directed dorso-caudad, margin dented, slightly curved subapically, acute at apex, other directed caudad, straight with dented margin; flagellum with two processes at basal half, visible in both left and right lateral view, the main lobe truncate anteriorly produced into two thin processes, one elongate, extending more than half length of aedeagal shaft, and another one short, half of the longer one. Aedeagal shaft, in left lateral view (Fig. 8), with a long process near middle, acute apically, directed caudad; flagellum with pendent lobe, two finger-like processes apically and a spindlelike process near aedeagal shaft. Genital styles (Fig. 11) in profile large, elongate, reaching slightly over apex of anal segment, narrow at basal half, dilated at apical half, posterior end slightly curved, deeply concave apically; lateroventral margin convex at middle, with a pair of lobed processes at base, spinose apically; inner side of laterodorsal margine with a lobe at base. Pygofer in profile distinctly narrowed medially, dorsocaudal angles (Fig. 12) produced caudad asymmetrically, left angle longer than wide, right angle as long as wide. Female genitalia. Genital scale (Fig. 4) in ventral view with apical half slender, basal half broadly rounded with production wider at base than long in middle line about 1.12: 1. Type materials. Holotype male, KOREA: Sambongsan, Gyeongsangbuk −do Province, 14 Jul. 1997, Y.J. Kwon (KNU). Paratypes: KOREA: 2 males, same data as holotype; 2 males, 2 females, Hakkasan, Gyeongsangbuk −do Province, 21 Aug. 1998, Y.J. Kwon; 3 males, 4 females, Sisan, Jeollanam −do Province, 18 Aug. 2011, Y.J. Kwon; 1 female, Chirisan, Gyeongsangnam −do Province, 17 Aug. 1990, Y.J. Kwon; 1 female, Daegu city, Gyeongsangbuk −do Province, 6 Sep. 1981, Y.J. Kwon (KNU). Etymology. The word “ fuscolineata ” is derived from the Latin words fusco, meaning “dark” and lineo, meaning “line”. This species is named for the presence of the dark lining along claval and costal margin of tegmina. Remarks. This species is closely related to V. diluta, V. nigrolineata and V. kotoshonis, all from Taiwan, on the basis of wing color pattern, but can be distinguished by the female genital scale (Fig. 4) that is symmetrical (female genital scale asymmetrical in V. diluta); the production of female genital scale wider at widest part than long in middle line about 1.15: 1 (the production of scale longer in middle line than widest part about 1.13: 1 in V. nigrolineata and 1.08: 1 in V. kotoshonis). This species can be easily distinguished from all other species of this genus by the shape of aedeagus, especially the aedeagal shaft with three processes at middle.Published as part of Rahman, Mohammad Atikur, Kwon, Yong Jung & Suh, Sang Jae, 2012, Two new species of the genus Vekunta Distant (Hemiptera: Fulgoromorpha: Derbidae) from Korea, pp. 23-33 in Zootaxa 3313 on pages 28-30, DOI: 10.5281/zenodo.21530
Drabescoides Kwon & Lee
No full textKey to male species of the Genus Drabescoides Kwon & Lee 1. Aedeagal shaft with collar-shaped process on dorsal margin in dorsal view........................................ 2 - Aedeagal shaft without collar-shaped process on dorsal margin in dorsal view..................................... 3 2. Aedeagal shaft with pair of broad lamellae above collar-shaped process........................... D. complexa sp. nov. - Aedeagal shaft without pair of broad lamellae above collar-shaped process............ D. undomarginata Cen & Cai, 2002 3. Connective stem obviously concave at apical margin, X-shaped.......................... D. longiarma Li & Li, 2010 - Connective stem not concave at apical margin, T-shaped or n-shaped............................................. 4 4. Pygofer lobe with elongated ventral margin; connective stem apex greatly expanded, T-shaped... D. nuchalis (Jacobi, 1943) - Pygofer lobe without elongated ventral margin; connective stem apex not expended, n-shaped.................................................................................................. D. umbonata Shang & Zhang, 2003Published as part of Qu, Ling, Li, Hu & Dai, Ren-Huai, 2014, Key to species of leafhopper genus Drabescoides Kwon & Lee (Hemiptera, Cicadellidae), with description of a new species from Southern China, pp. 347-358 in Zootaxa 3811 (3) on page 348, DOI: 10.11646/zootaxa.3811.3.5, http://zenodo.org/record/22750
Obstructions for bounded shrub-depth and rank-depth
No full textShrub-depth and rank-depth are dense analogues of the tree-depth of a graph.
It is well known that a graph has large tree-depth if and only if it has a long
path as a subgraph. We prove an analogous statement for shrub-depth and
rank-depth, which was conjectured by Hlin\v{e}n\'y, Kwon, Obdr\v{z}\'alek, and
Ordyniak [Tree-depth and vertex-minors, European J.~Combin. 2016]. Namely, we
prove that a graph has large rank-depth if and only if it has a vertex-minor
isomorphic to a long path. This implies that for every integer , the class
of graphs with no vertex-minor isomorphic to the path on vertices has
bounded shrub-depth.Comment: 19 pages, 5 figures; accepted to Journal of Combinatorial Theory Ser.
The role of heterodera glycines biotin synthase in the nematode-soybean interactions
No full textHeterodera glycines, the soybean cyst nematode (SCN), is a plant-parasitic nematode capable of manipulating host plant biochemistry and development. Many studies have shown that the nematode has acquired genes from bacteria via horizontal gene transfer events (HGTs) that have the potential to enhance nematode parasitism. A recent allelic imbalance analysis identified two candidate virulence genes, which also appear to have entered the SCN genome through HGTs. One of the candidate genes, H. glycines biotin synthase (HgBioB), contained sequence polymorphisms between avirulent and virulent inbred SCN strains. To test the function of avirulent and virulent HgBioB alleles, a complementation experiment using mutant Escherichia coli with these two HgBioB alleles was conducted. Here we report that avirulent nematodes produce an active biotin synthase while virulent ones contain an inactive form of the enzyme. Moreover, we conclude from the sequencing analysis of SCN field populations that in nature the HgBioB gene contains a diverse mixture consisting of both avirulent and virulent alleles, but the virulent forms are more prevalent. We hypothesize that a lack of HgBioB activity within the virulent SCN could allow the nematode to evade a dethiobiotin-related toxin defense mechanism in host plants. Specifically, we showed that all soybean cultivars accumulate detectable levels of α-methyldethiobiotin (α-MDB), a dethiobiotin-related toxin found in bacteria. This is the first report of detecting α-MDB from soybean or any plant. Future work will determine if there is a significant difference in α-MDB levels between resistant and susceptible soybean cultivars.Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2020-05-01The student, Khee-Man Kwon, accepted the attached license on 2018-04-23 at 11:08.The student, Khee-Man Kwon, submitted this Thesis for approval on 2018-04-23 at 15:32.This Thesis was approved for publication on 2018-04-23 at 15:56.DSpace SAF Submission Ingestion Package generated from Vireo submission #12421 on 2018-08-31 at 17:21:14Made available in DSpace on 2018-09-04T20:36:51Z (GMT). No. of bitstreams: 2
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A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
Luteithermobacter Park & Namirimu & Yang & Kwon 2020, GEN. NOV.
No full textDESCRIPTION OF LUTEITHERMOBACTER GEN. NOV. Luteithermobacter (Lu.te.i.ther.mo.bac’ter. L. masc. n. luteus yellowish; Gr. adj. thermos hot; N.L. masc. n. bacter a rod; N.L. masc. n. Luteithermobacter a rod-shaped yellowish thermophile). Includes Gram-stain-negative, neutrophilic and thermophilic marine bacteria that grow under aerobic conditions. Cells are rod-shaped and form pale yellow colonies. The cell wall comprises fatty acids such as saturated forms with carbon number 14–16, unsaturated forms with carbon number 16–18, hydroxyl form with carbon number 14, and cyclic form with carbon number 19. The only respiratory quinone is Q-10, and the DNA G+C content is approximately 55 mol%. The type species is Luteithermobacter gelatinilyticus.Published as part of Park, Mi-Jeong, Namirimu, Teddy, Yang, Sung-Hyun & Kwon, Kae Kyoung, 2020, Description of Luteithermobacter gelatinilyticus gen. nov., sp. nov., and Paremcibacter congregatus gen. nov., comb. nov. via reclassification of the genus Emcibacter, pp. 4691-4697 in International Journal of Systematic and Evolutionary Microbiology 70 (8) on page 4695, DOI: 10.1099/ijsem.0.004334, http://zenodo.org/record/622400
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