5,999 research outputs found
Elliptic flow of identified hadrons in Pb-Pb collisions at root(NN)-N-s=2.76 Tev
No full textThe elliptic flow coefficient (v(2)) of identified particles in Pb-Pb collisions at root s(NN) = 2.76 TeV was measured with the ALICE detector at the Large Hadron Collider (LHC). The results were obtained with the Scalar Product method, a two-particle correlation technique, using a pseudo-rapidity gap of |Delta eta| > 0.9 between the identified hadron under study and the reference particles. The v (2) is reported for pi(+/-), K-+/-, K-S(0), p+(p) over bar, phi, Lambda+(Lambda) over bar, Xi+(Xi) over bar (+) and Omega(-)+(Omega) over bar (+) in several collision centralities. In the low transverse momentum (p(T)) region, p(T) < 3 GeV/c, v(2)(p(T)) exhibits a particle mass dependence consistent with elliptic flow accompanied by the transverse radial expansion of the system with a common velocity field. The experimental data for pi (+/-) and the combined K-+/- and K-S(0) results, are described fairly well by hydrodynamic calculations coupled to a hadronic cascade model (VISHNU) for central collisions. However, the same calculations fail to reproduce the v(2)(p(T)) for p+(p) over bar, phi, Lambda+(Lambda) over bar, Xi+(Xi) over bar (+). For transverse momentum values larger than about 3 GeV/c, particles tend to group according to their type, i.e. mesons and baryons. The present measurements exhibit deviations from the number of constituent quark (NCQ) scaling at the level of +/- 20% for p(T) > 3 GeV/
Effects of PbO on the repassivation kinetics of alloy 690
No full textEffects of PbO on the repassivation kinetics of alloy 690 were examined to elucidate the reason why the alloy, otherwise immune, is susceptible to stress corrosion cracking (SCC) in high temperature water contaminated with a small amount of Pb compounds. The repassivation kinetics of the alloy was analyzed in terms of the current density i(t) flowing from the scratch as a function of the charge density q(t) that has flowed from the scratch. During the repassivation on the scratched surface of the alloy, passive film initially nucleated and grew according to the place exchange model in which log i(t) is linearly proportional to q(t), and then grew according to the high-field ion conduction model in which log i(t) is linearly proportional to 1/q(t) with a slope of cBT; a parameter of repassivation rate. The higher the cBV, the slower is the repassivation rate of an alloy. The cBV of alloy 690 was increased significantly in water with PbO compared with that in water without PbO, suggesting that the PbO decreased the repassivation rate of the alloy, and hence reduced the resistance to SCC. The decrease in repassivation rate of the alloy resulted from both Pb-induced Cr dissolution and an incorporation of Pb compounds into the passive film during repassivation. (c) 2005 Elsevier Ltd. All rights reserved.The authors acknowledge the financial support of Korea Atomic Research Institute
(KAERI). This work was partly supported by the Brain Korea 21 project
Liogluta rufescens Lee & Ahn, sp. nov.
No full textLiogluta rufescens Lee & Ahn, sp. nov. (Figs. 1 G, 8) Description. Length 2.0– 2.3 mm. Body (Fig. 1 G) parallel-sided; surface fairly glossy and densely pubescent, with microsculpture. Body reddish brown; head reddish black; elytra and legs paler, yellowish brown; abdominal segments V–VIII darker than other segments. Head. Subquadrate, approximately 1.0–1.1 times as wide as long, widest across eyes, slightly narrower than pronotum; eyes moderate in size and slightly prominent, about 1.0–1.2 times as long as temples; gular sutures moderately separated, diverged basally; infraorbital carina complete; cervical carina complete. Antennae (Fig. 8 A) long and slender; antennomeres 1–3 elongate, 1 longest, 2 slightly longer than 3, 4–10 subquadrate to slightly transverse, 11 longer than wide, about as long as preceding two combined. Mouthparts. Labrum transverse, emarginate in anterior margin, with ε-sensillum and about 9 macrosetae on each side of midline; epipharynx with several sensilla, including 2 lateral sensory rows on each side of midline; α-sensillum long and setaceous, about 2.0 times as long as ε-sensillum, β- and γ-sensilla very short. Mandibles asymmetrical, subtriangular, decurved and pointed apically, about 1.5–1.6 times as long as basal width; minute denticles present in molar region; right one with small internal tooth, internal margin slightly serrulate; prostheca developed, composited three portions. Galea and lacinia of maxilla long and slender; lacinia composited seven spines in distal comb region, contiguous with two isolated spines; maxillary palpus elongate, with pubescence and long setae; palpomere 1 smallest, 2 about 2.5–2.7 times as long as wide, 3 slightly longer than 2, about 2.4–2.6 times as long as wide, 4 digitiform, filamentous sensilla not reaching to basal half. Labium with ligula elongate, divided into 2 lobes in basal half; prementum with two medial setae widely separated; two basal pores moderately separated, about 2.0 times width of basal pore; several medial pseudopores, 1 setal pore and 2 real pores present on each side of midline; labial palpus with many setulae; palpomere 1 largest, about 1.5–1.7 times as long as wide, γ-setula contiguous with b-seta, 2 shortest, about 1.2–1.4 times as long as wide, 3 parallelsided and about as long as 1, about 3.0 times as long as wide. Mentum trapezoidal, anterior margin almost straight; v-seta relatively long, close to u-setae. Thorax. Pronotum slightly transverse, approximately 1.2–1.3 times as wide as long, widest in apical third; hypomera fully visible in lateral aspect. Metanotal scutum with 1 long seta and about 2 relatively short setae on each side of midline. Mesocoxal cavities moderately separated, mesoventral process pointed at apex, slightly longer than isthmus and metaventral process combined; isthmus about as long as metaventral process. Elytra longer and slightly wider than pronotum; elytron approximately 1.4–1.5 times as long as wide, pubescence directed posteriorly and postero-laterally; postero-lateral margin straight; hind wings fully developed, flabellum composed of about 6 long setose lobes. Legs. Slender and long, with pubescence and macrosetae; tibiae with different length of two spurs at apex; tarsal formula 4-5-5, meso- and metatarsomere 1–4 subequal in length; one empodial seta present, shorter than claw. Abdomen. Parallel-sided; surface fairly glossy and densely pubescent, with imbricate microsculpture; macrochaetal arrangement of tergites II–VI 01-13-13 -13-13; male tergite VIII (Fig. 8 B) with 4 macrosetae on each side of midline, broad process present in median region and posterior margin denticulate; male sternite VIII (Fig. 8 C) with 9 macrosetae on each side of midline, posterior margin slightly convex, with inconspicuous marginal setae; posterior margin of female tergite VIII subtruncate; posterior margin of female sternite VIII slightly emarginate, with conspicuous and long marginal setae, minute setae in median region. Aedeagus. Median lobe (Figs. 8 D–E) narrowly ovate and widest in basal fourth, apical process elongate and parallel-sided, convergent at apex in ventral aspect; internal sac developed. Apical lobe of paramerites (Fig. 8 F) with four setae; a-seta longest, c- and d-setae shorter than b-seta, close together and positioned apically. Type material. Holotype, ♂, labeled as follows: ‘ KOREA: Seoul, Dobong-gu, Mt. Bukhansan, 24 III 1988, Y. S. Kim, ex leaf litter; HOLOTYPE Liogluta rufescens Lee and Ahn 2016 ’. Desig. S.-G. Lee and K.-J. Ahn 2016. Paratypes, 3 exx. (one on slide), same data as Holotype. Distribution. Korea (South). Remarks. Adults are very similar to those of L. distans, but can be distinguished by the characters provided in the key and different shape and structure of aedeagus. Etymology. Named from the Latin rufescens meaning ‘‘red, reddish” which refers to the body color.Published as part of Lee, Seung-Gyu & Ahn, Kee-Jeong, 2016, A taxonomic review of Korean Liogluta Thomson (Coleoptera, Staphylinidae, Aleocharinae) with descriptions of three new species, pp. 285-303 in Zootaxa 4193 (2) on pages 299-301, DOI: 10.11646/zootaxa.4193.2.5, http://zenodo.org/record/16691
Measurement of Prompt D-Meson Production in p-Pb Collisions at root s(NN)=5.02 TeV
No full textThe p(T)-differential production cross sections of the prompt charmed mesons D-0, D+, D*(-), and D-s(+) and their charge conjugate in the rapidity interval -0.96 < y(cms) < 0.04 were measured in p-Pb collisions at a center-of-mass energy root s(NN) = 5.02 TeV with the ALICE detector at the LHC. The nuclear modification factor R-pPb, quantifying the D-meson yield in p-Pb collisions relative to the yield in pp collisions scaled by the number of binary nucleon-nucleon collisions, is compatible within the 15%-20% uncertainties with unity in the transverse momentum interval 1 < p(T) < 24 GeV/c. No significant difference among the R-pPb of the four D-meson species is observed. The results are described within uncertainties by theoretical calculations that include initial-state effects. The measurement adds experimental evidence that the modification of the momentum spectrum of D mesons observed in Pb-Pb collisions with respect to pp collisions is due to strong final-state effects induced by hot partonic matter
Measurement of electrons from semileptonic heavy-flavor hadron decays in pp collisions at root s=2.76 TeV
No full textThe p(T)-differential production cross section of electrons from semileptonic decays of heavy-flavor hadrons has been measured at midrapidity in proton-proton collisions at root s = 2.76 TeV in the transverse momentum range 0.5 < p(T) < 12 GeV/c with the ALICE detector at the LHC. The analysis was performed using minimum bias events and events triggered by the electromagnetic calorimeter. Predictions from perturbative QCD calculations agree with the data within the theoretical and experimental uncertainties
Atheta (Dimetrota) ovata Lee & Ahn 2022, sp. nov.
No full textAtheta (Dimetrota) ovata Lee & Ahn, sp. nov. (Figs. 1B, 3A–F, 4A–H, 5A–G, 6A–D) Description. Length 2.5–3.2 mm. Body (Fig. 1B) surface glossy, densely pubescent with microsculpture. Body dark brown to black; antennae, elytra and legs paler than other parts, brownish. Head. Slightly transverse (Fig. 4A), approximately 1.1–1.2 times as wide as long, widest across eyes, slightly narrower than pronotum; eyes large and prominent, about 1.5–1.6 times as long as temples; gular sutures moderately separated, more or less diverged basally; cervical carina complete. Antennae (Fig. 4B) long and slender; antennomeres 1–3 elongate, 1 longest, 2 about as long as 3, 4–10 quadrate to subquadrate, 11 about as long as 1, about as long as preceding two combined. Mouthparts. Labrum (Fig. 3A) with 10–11 macrosetae on each side of midline; epipharynx (Fig. 3B) with α-sensillum long and setaceous, about 3.0 times as long as ε-sensillum; β- and γ-sensilla short. Mandibles (Figs. 3C–D) asymmetrical, subtriangular, decurved and pointed apically, about 1.5–1.6 times as long as basal width; very few small denticles present in molar region; right one (Fig. 3C) with small internal tooth, internal margin slightly serrulate; prostheca developed, composed of three portions, second portion slightly longer. Galea and lacinia of maxilla (Fig. 3E) long and slender; maxillary palpus elongate and pubescent; palpomere 1 smallest, 2 about 2.6–2.8 times as long as wide, 3 slightly longer than 2, about 2.5–2.7 times as long as wide, 4 digitiform, filamentous sensilla not reaching to basal half. Prementum (Fig. 3F) with two medial setae very narrowly separated; two basal pores contiguous, less than 1.0 times width of basal pore; several medial pseudopores, lateral pseudopores, 1 setal pore and 2 real pores present on each side of midline; labial palpomere 1 largest, about 1.5–1.6 times as long as wide, γ-setula contiguous with b-seta, 2 shortest, about 1.6–1.8 times as long as wide, 3 more or less dilated apically and slightly shorter than 1, about 2.5–3.0 times as long as wide. Mentum (Fig. 3F) trapezoidal, anterior margin slightly emarginate; v-seta relatively long, close to u-seta. Thorax. Pronotum (Fig. 4C) approximately 1.3–1.4 times as wide as long, widest in apical third to half. Prosternum as in Fig. 4D. Metanotal scutum (Fig. 4E) with 1 long seta and about 3–4 short setae on each side of midline. Mesoventral process (Fig. 4F) distinctly pointed at apex, longer than isthmus and metaventral process combined. Scutellum as in Fig. 4G. Elytra slightly longer and wider than pronotum; elytron (Fig. 4H) approximately 1.6 times as long as wide; hind wings fully developed, flabellum (Fig. 4E) composed of about 6–7 long setose lobes. Legs. Length ratio of tarsomeres 22:26:30:76 (protarsus); 30:35:38:35:68 (mesotarsus); 45:44:43:46:96 (metatarsus). Abdomen. Surface glossy and densely pubescent, with transverse and reticulate microsculpture (Fig. 5C); macrochaetal arrangement of tergites II–VI 02-13 (or 23)-23-23-23; male sternites III–VI with many small pores, VII with several small pores in anterior region; male tergite VIII (Fig. 5A) with 4 macrosetae on each side of midline, posterior margin (Fig. 5B) with broad process, slightly emarginate in median region and slightly angled in postero-lateral margins; male sternite VIII (Fig. 5D) with 10 macrosetae on each side of midline, posterior margin with inconspicuous marginal setae; posterior margin of female tergite VIII (Fig. 5E) truncate in median region; female sternite VIII (Fig. 5F) with 8 macrosetae, posterior margin (Fig. 5G) broadly rounded, with conspicuous and long marginal setae, minute setae present in median region. Aedeagus. Median lobe (Figs. 6A–B) narrowly ovate, apical process subtriangular and convergent at apex, apex slightly swollen and globular in ventral aspect. Apical lobe of paramerites (Fig. 6C) subparallel-sided, with 4 setae; b-seta longest, distinctly longer than other setae short and subequal in length, c- and d-setae close together. Spermatheca. Bursa elongate, with slender umbilicus; duct recurved, deflected at apex (Fig. 6D). Type material. Holotype, ♂, labeled as follows: ‘ KOREA: Gangwon Prov., Pyeongchang-gun, Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Sangwonsa, 22 VI–16 VIII 2001, S.-J. Park, C.-W. Shin, ex FIT’. Paratypes, 9 exx., same data as holotype. Material examined. SOUTH KOREA: Chungbuk Prov.: 3 exx., Buyeo-gun, Oesan-myeon, Gaedeok-ri, Mt. Wolmyeongsan, 1 vi 2000, US Hwang, HJ Kim, sifting; 1 ex., Danyang-gun, Mt. Sobaeksan, Cheongdong, 7–9 v 1999, US Hwang, HJ Kim, sifting. Chungnam Prov.: 1 ex., Gongju-si, Banpo-myeon, Sangsin-ri, Mt. Gyeryongsan, 21 v 2000, MS Kim, near stream. Gangwon Prov.: 1 ex., Hongcheon-gun, Naechon-myeon, Mt. Baekamsan, Garyeong fall, 25 v–20 vi 2002, KJ Ahn, SJ Park, JS Park, FIT; 2 exx., Hongcheon-gun, Nae-myeon, Mt. Gyebangsan, Unduryeong, N37° 42.49.9′ E128° 26.40.3′, 1100 m, 11 v 2007, TK Kim, YH Kim, fungus on log; 5 exx., Injegun, Mt. Jeombongsan, Gombaeryeong, 23–30 viii 1999, US Hwang, bait trap; 1 ex., Jeongseon-gun, Gohan-eup, Mt. Hambaeksan, 13 vii 1999, US Hwang, mushroom; 2 exx., Mt. Seoraksan, 23 viii 1996, T. Pierre, mushroom; 21 exx., Pyeongchang-gun, Cheondong-ri, Mt. Sambangsan, 13 vii–15 viii 2001, KJ Ahn, SJ Park, CW Shin, FIT in Pinus forest; 67 exx., Pyeongchang-gun, Jinbu-myeon, Dongsan-ri, Mt. Odaesan, Sangwonsa, 30 iv–4 vi 2001, KJ Ahn, SJ Park, MS Kim, MJ Jeon, FIT; 161 exx., same data as former except for ‘ 4 vi–22 vi 2001 ’; 9 exx., same data as former except for ‘ 18 viii 2000, MH Kim, entirely rotten mushroom (Boletaceae)’; 5 exx., same data as former except for ‘ 22 viii 2000, KJ Ahn, JH Ahn’; 152 exx., same data as former except for ‘ 22 vi–16 viii 2001, SJ Park, CW Shin, FIT’; 15 exx., same data as former except for ‘ 16 viii–15 ix 2001 ’; 5 exx., same data as former except for ‘ 15 ix–14 xi 2001, KJ Ahn, CW Shin, FIT’; 9 exx., same data as former except for ‘ 21 iv–18 v 2002, SJ Park, CW Shin, FIT’; 17 exx., same data as former except for ‘ 18 v–23 vi 2002, SJ Park, JS Park, FIT’; 2 exx., same data as former except for ‘ 23 vi 2002, SJ Park, JS Park, mushroom’; 2 exx., same data as former except for ‘ 13 vii 2004, SM Choi, mushroom’; 6 exx., same data as former except for ‘ 18 vi 2004, SJ Park, FIT’; 27 exx., same data as former except for ‘ 18 vi–22 vii 2004, SJ Park, KM Yang, DH Lee, FIT’; 2 exx., same data as former except for ‘37°47′8.3″ E128°33′54.0″ 880 m, 10 ix 2009, TK Kim, YH Kim, leaf litter’; 17 exx., same data as former except for ‘ N37°47′3.4″ E128°33′44.6″ 930 m, 12 VI 2012, YH Kim, SG Lee, YG Ban, JC Lim, mushroom’; 2 exx., same data as former except for ‘Bukdaesa, 23 viii 2000, MH Kim, mushroom’; 2 exx., same data as former except for ‘Namdae jijangam, 12 ix 2007, HW Kim, YH Kim, mushroom’; 7 exx., Pyeongchang-gun, Jinbu-myeon, Mt. Odaesan, Woljeongsa, 22 viii–20 x 2000, KJ Ahn, FIT; 4 exx., Pyeongchang-gun, Mt. Odaesan, Jeokmyeolbogung, 7–9 vii 1998, KL You, HJ Lim, FIT; 1 ex., Pyeongchang-gun, Bangrim-myeon, Ungyo 2-ri, Mt. Baekdeoksan, 12 vii–16 viii 2001, KJ Ahn, SJ Park, CW Shin, FIT; 1 ex., Taebaek-si, Mt. Taebaeksan, Baekdansa, 16 vii 1999, US Hwang, HJ Kim, sifting; 1 ex., Yangyang-gun, Seo-myeon, Osaek-ri, Hangyeryeong, 16 viii 2000, MH Lim, mushroom; 3 exx., Yangyang-gun, Seo-myeon, Osaek-ri, Mt. Seoraksan, Osaekyaksu, 31 vii–15 ix 2002, SJ Park, CW Shin, JS Park, FIT; 3 exx., same data as former except for ‘Osaekyaksu, 20 vii 2004, SJ Park, KM Yang, KJ Ahn, mushroom’; 2 exx., Yeongwol-gun, Suju-myeon, Mt. Baekdeoksan, Gwaneumsa, 13 vii–15 viii 2001, KJ Ahn, SJ Park, CW Shin, FIT. 2 exx., Yeongwol-gun, Yeongwol-eup, Mt. Taehwasan, 14 viii 2001, MH Kim, mushroom (Boletaceae). Jeonbuk Prov.: 3 exx., Jeongeup-si, Mt. Naejangsan, Naejangsa, Geumseon valley, 15–24 vi 2000, US Hwang, HJ Kim, FIT. Distribution. Korea (South). Remarks. This species is very similar to Atheta (Dimetrota) machonryongica, but can be distinguished by the characters provided in the key and the different shape and structure of aedeagus and spermatheca. Most specimens were collected by FIT and from mushroom in forest. Etymology. Named from Latin ovata meaning “ovate”, which refers to the shape of median lobe of aedeagus.Published as part of Lee, Seung-Gyu & Ahn, Kee-Jeong, 2022, Korean species of the Atheta Thomson subgenus Dimetrota Mulsant & Rey (Coleoptera: Staphylinidae: Aleocharinae) with a description of new species, pp. 401-416 in Zootaxa 5138 (4) on pages 406-411, DOI: 10.11646/zootaxa.5138.4.3, http://zenodo.org/record/657154
Measurement of the production of high-pTelectrons from heavy-flavour hadron decays in Pb-Pb collisions at sNN=2.76 ATeV
No full textElectrons from heavy-flavour hadron decays (charm and beauty) were measured with the ALICE detector in Pb-Pb collisions at a centre-of-mass of energy root s(NN) = 2.76 TeV. The transverse momentum (pT) differential production yields at mid-rapidity were used to calculate the nuclear modification factor R-AA in the interval 3 < p(T) < 18 GeV/c. The R-AA shows a strong suppression compared to binary scaling of pp collisions at the same energy (up to a factor of 4) in the 10% most central Pb-Pb collisions. There is a centrality trend of suppression, and a weaker suppression (down to a factor of 2) in semi-peripheral (50-80%) collisions is observed. The suppression of electrons in this broad p(T) interval indicates that both charm and beauty quarks lose energy when they traverse the hot medium formed in Pb-Pb collisions at LHC. (C) 2017 The Author. Published by Elsevier B.V
Beauty production in pp collisions at root s=2.76 TeV measured via semi-electronic decays
No full textThe ALICE Collaboration at the LHC reports measurement of the inclusive production cross section of electrons from semi-leptonic decays of beauty hadrons with rapidity |y| < 0.8 and transverse momentum 1 < p(T)< 10 GeV/c, in pp collisions at root s = 2.76 TeV. Electrons not originating from semi-electronic decay of beauty hadrons are suppressed using the impact parameter of the corresponding tracks. The production cross section of beauty decay electrons is compared to the result obtained with an alternative method which uses the distribution of the azimuthal angle between heavy-flavour decay electrons and charged hadrons. Perturbative QCD predictions agree with the measured cross section within the experimental and theoretical uncertainties. The integrated visible cross section, sigma(b -> e) = 3.47 +/- 0.40(stat)(+1.12)(-1.33)(sys) +/- 0.07(norm) mu b, was extrapolated to full phase space using Fixed Order plus Next-to-Leading Log (FONLL) calculations to obtain the total b (b) over bar production cross section, sigma(b (b) over bar) = 130 +/- 15.1(stat)(+42.1)(-49.8)(sys)(+3.4)(-3.1)(extr) +/- 2.5(norm) +/- 4.4(BR) mu b. (C) 2014 The Authors. Published by Elsevier B.
Liogluta changwhani Lee and Ahn, sp. nov.
No full textLiogluta changwhani Lee and Ahn, sp. nov. (Figs. 1 A, 2–3) Description. Length 2.5–2.8 mm. Body (Fig. 1 A) parallel-sided; surface fairly glossy and densely pubescent, with microsculpture. Body dark brown to black; head almost black; pronotum and abdomen darker than elytra; legs paler, yellowish brown. Head. Subquadrate, about 1.0–1.1 times as wide as long, widest across eyes, slightly narrower than pronotum; eyes large and prominent, about 1.4–1.5 times as long as temples; gular sutures moderately separated, more or less diverged basally; infraorbital carina complete; cervical carina complete. Antennae (Fig. 3 A) long and slender; antennomeres 1–3 elongate, 1 longest, 2 about as long as 3, 4–10 subquadrate to slightly transverse, 11 longer than wide, about as long as preceding two combined. Mouthparts. Labrum (Fig. 2 A) transverse, slightly emarginate in anterior margin, with ε-sensillum and about 9–10 macrosetae on each side of midline; epipharynx (Fig. 2 B) with several sensilla, including 2 lateral sensory rows on each side of midline; αsensillum long and setaceous, about 2.0 times as long as ε-sensillum, β-sensillum short, convergent apically, γsensillum reduced. Mandibles (Figs. 2 C–D) asymmetrical, subtriangular, decurved and pointed apically, about 1.5–1.6 times as long as basal width; minute denticles present in molar region; right one (Fig. 2 C) with small internal tooth, internal margin slightly serrulate; prostheca developed, composited three portions, second portion slightly longer. Galea and lacinia of maxilla (Fig. 2 E) long and slender; lacinia having seven spines in distal comb region, contiguous with two isolated spines; maxillary palpus elongate, with pubescence and long setae; palpomere 1 smallest, 2 about 2.8–3.0 times as long as wide, 3 slightly longer than 2, about 2.7–2.9 times as long as wide, 4 digitiform, filamentous sensilla reaching to basal half. Labium (Fig. 2 F) with ligula divided into 2 lobes in basal half; prementum with two medial setae widely separated; two basal pores narrowly separated, about 1.0–2.0 times width of basal pore; several medial pseudopores, 1 setal pore and 2 real pores present on each side of midline; labial palpus with many setulae; palpomere 1 largest, about 2.0 times as long as wide, γ-setula contiguous with bseta, 2 shortest, about 1.4–1.6 times as long as wide, 3 subparallel-sided, slightly shorter than 1, about 3.0–3.5 times as long as wide. Mentum (Fig. 2 F) trapezoidal, anterior margin emarginate; v-seta short, close to u-seta. Thorax. Pronotum slightly transverse, approximately 1.3 times as wide as long, widest in apical third; hypomera fully visible in lateral aspect. Metanotal scutum with 1 long seta and about 4–5 relatively short setae on each side of midline. Mesocoxal cavities narrowly separated, mesoventral process pointed at apex, slightly longer than isthmus and metaventral process combined; isthmus slightly longer than metaventral process. Elytra longer and slightly wider than pronotum; elytron approximately 1.5–1.6 times as long as wide, pubescence directed posteriorly and postero-laterally; postero-lateral margin almost straight; hind wings fully developed, flabellum composed of about 5–6 long setose lobes. Legs. Slender and long, with pubescence and macrosetae; meso- and metatibiae with different length of two spurs at apex; tarsal formula 4-5-5, length ratio of tarsomeres 25:27:30:67 (protarsus); 31:36:38:39:68 (mesotarsus); 48:46:44:42:80 (metatarsus); one empodial seta present, about as long as claw. Abdomen. Parallel-sided; surface distinctly glossy and densely pubescent, with reticulate microsculpture; macrochaetal arrangement of tergites II–VI 01-21-13 -13-13; male tergite VIII (Fig. 3 B) with 4 macrosetae on each side of midline; broad process present in median region and posterior margin crenate; male sternite VIII (Fig. 3 C) with 9 macrosetae on each side of midline, posterior margin slightly convex, subtriangular, with long marginal setae; posterior margin of female tergite VIII (Fig. 3 D) subtruncate; female sternite VIII (Fig. 3 E) with 7 macrosetae, posterior margin slightly emarginate in median region, with conspicuous marginal setae and minute setae. Aedeagus. Median lobe (Figs. 3 F–G) narrowly ovate and widest in basal fourth, apical process elongate and convergent at apex in ventral aspect; internal sac developed. Apical lobe of paramerites (Fig. 3 H) with four setae; a-seta slightly longer than b- and d-setae subequal in length, c-seta very short and close to d-seta. Spermatheca. Bursa dilated apically and conical shaped umbilicus; duct loosely coiled (Fig. 3 I). Type material. Holotype, ♂, labeled as follows: ‘ KOREA: Chungnam Prov., Daejeon-si, Seo-gu, Jangandong, Mt. Jangtaesan, N36°13′03.3″ E127°20′36.2″ 258 m, 28 III 2012, DH Lee, TK Kim, SG Lee; HOLOTYPE Liogluta changwhani Lee and Ahn 2016 ’. Desig. S.-G. Lee and K.-J. Ahn 2016. Paratypes, 40 exx. (total): 19 exx. (one on slide), same data as Holotype; 21 exx. (two on slide), Korea. Gyeongbuk prov., Yongjang-ri, Naenammyeon, Gyeongju-si, ex FIT 21.V-26.VI.2007, YB Cho coll. E129°12′42.9″ N35°46′19.5″. Material examined. SOUTH KOREA: Chungnam prov.: 11 exx. (five in 95% ETOH), Daejeon-si, Seo-gu, Jangan-dong, Jangtaesan Recreational Forest, N36°13′4.32″ E127°20′34.44″ 257m, 17 III 2011, IS Yoo, YH Kim, SG Lee, leaf litters. Distribution. Korea (South). Remarks. Adults are similar to those of L. pyonganica, but can be distinguished by the characters provided in the key and different shape and structure of aedeagus and spermatheca. Etymology. Named after the late professor Chang-Whan Kim in honor of his pioneering research on Korean insects.Published as part of Lee, Seung-Gyu & Ahn, Kee-Jeong, 2016, A taxonomic review of Korean Liogluta Thomson (Coleoptera, Staphylinidae, Aleocharinae) with descriptions of three new species, pp. 285-303 in Zootaxa 4193 (2) on pages 286-290, DOI: 10.11646/zootaxa.4193.2.5, http://zenodo.org/record/16691
Amischa koreana Lee & Ahn 2023, sp. nov.
No full textAmischa koreana Lee & Ahn, sp. nov. (Figs. 1C, 3A–F, 4A–H, 5A–F, 6A–E) Description. Length 1.6–1.8 mm. Body (Fig. 1C) subparallel-sided; surface slightly glossy and densely pubescent, with microsculpture. Body reddish yellow to reddish brown; basal antenna and leg paler and yellowish; apical segments of abdomen paler than other segments. Head (Fig. 4A). Subtriangular with broad neck, approximately 1.0–1.1 times as wide as long, widest behind eyes, narrower than pronotum; eyes moderate in size and slightly prominent, about as long as temples; gular sutures moderately separated; infraorbital carina absent; cervical carina absent. Antenna (Fig. 4B) relatively short and slender; antennomeres 1–3 elongate, 1 longest and slightly longer than 2, 3 distinctly shorter than 2, 4–10 subquadrate to slightly transverse, slightly 11 shorter than wide and about as long as preceding two combined. Mouthparts. Labrum (Fig. 3A) transverse, slightly emarginate in anterior margin, with ε-sensillum and about 8 macrosetae on each side of midline; epipharynx (Fig. 3B) with several sensilla, including 2 lateral sensory rows on each side of midline; α-sensillum short, about as long as ε-sensillum and slightly shorter than lateral sensory rows; β and γ-sensilla reduced. Mandibles (Figs. 3C–D) asymmetrical, subtriangular, decurved and pointed apically, about 1.5–1.6 times as long as basal width; right one (Fig. 3C) with small internal tooth, internal margin slightly serrulate; prostheca developed, composited three portions, second portion slightly longer. Galea and lacinia of maxilla (Fig. 3E) long and slender; lacinia composited seven spines in distal comb region, two isolated spines present; last spine of distal comb region and isolated spines close together; maxillary palpus elongate and pubescent; palpomere 1 smallest, 2 about 2.8–3.0 as long as wide, 3 slightly longer than 2, about 2.3–2.5 times as long as wide, 4 short, filamentous sensilla reaching to basal half. Labium (Fig. 3F) with ligula slightly convex apically; prementum with two medial setae widely separated; two basal pores widely distant, more than 5.0 times width of basal pore; several medial pseudopores, 1 setal pore and 2 real pores present on each side of midline; labial palpus elongate, with many setulae; palpomere 1 largest, about 1.6–1.8 times as long as wide, with γ-setula close to b-seta, 2 shortest, about 1.2–1.4 times as long as wide, 3 narrowly long and about as long as 1, about 3.5–4.0 times as long as wide. Mentum (Fig. 3F) trapezoidal, anterior margin slightly emarginate; v-seta short, close to u-seta. Thorax. Pronotum (Fig. 4C) approximately 1.2 times as wide as long, widest in about middle. Metanotal scutum (Fig. 4E) with 1 long seta and about 1 short seta on each side of midline. Mesocoxae narrowly separated; mesoventral process (Fig. 4F) pointed at apex, reaching to middle of mesocoxae; mesocoxal cavities unmargined. Elytra slightly longer and wider than pronotum; elytra (Fig. 4H) approximately 1.5–1.6 times as long as wide, pubescence directed posteriorly and postero-laterally, postero-lateral margin sinuate; hind wings fully developed, flabellum composed of about 2 setose lobes. Leg slender and long, with dense pubescence and macrosetae; middle and hind tibiae with different length of two spurs at apex; tarsal formula 4-5-5, length ratio of tarsomeres 17:19:20:42 (front tarsus); 20:22:22:21:36 (middle tarsus); 31:32:29:25:43 (hind tarsus); one empodial seta present, shorter than claw. Abdomen. Parallel-sided; surface glossy and densely pubescent, with fine and imbricate microsculpture (Fig. 5A); macrochaetal arrangement of tergites II–VI 01-02-02-12 (or 02)-12; male tergite VIII (Fig. 6A) with 4 long macrosetae on each side of midline, posterior margin subtruncate; male sternite VIII (Fig. 6B) with about 7 long macrosetae on each side of midline, posterior margin convex, slightly rounded, with inconspicuous and long marginal setae; posterior margin of female tergite VIII (Fig. 5B) truncate; female sternite VIII (Fig. 5C) with about 6 long macrosetae on each side of midline, posterior margin (Fig. 5D) truncate in median region, with about 10 marginal setae conspicuous and relatively short. Aedeagus. Median lobe narrowly ovate; apical process slightly bent and pointed at apex in lateral aspect (Fig. 6C); pointed at apex in ventral aspect; distal crest short. Paramere (Fig. 6D) narrow; condylite short; apical lobe of paramerite pointed at apex and with 4 setae, d-seta very long, other setae short and subequal in length. Spermatheca. Bursa elongate, with large umbilicus; duct shortly coiled at apex (Figs. 5F, 6E). Type Material. Holotype, labeled as follows: ‘ KOREA: Gyeongbuk Prov., Uljin-gun, Seo- myeon, N36˚57'18.9" E129˚17'27.3" 141 m, 23 vii 2010, TK Kim, YH Kim, JH Jeon, leaf litters \ HOLOTYPE Amischa koreana Lee & Ahn Desig. S. - G. Lee and K.-J. Ahn 2022’ [CNUIC]. Paratypes, 4 exx., same data as holotype (two on slide) [CNUIC]. Distribution. Korea (South). Remarks. Amischa koreana is similar to A. bifoveolata, but can be distinguished by the characters provided in the key and the different external form and internal structure of the aedeagus (narrower median lobe and paramere and shaper apical process of median lobe) and the different shape of spermatheca.Published as part of Lee, Seung-Gyu & Ahn, Kee-Jeong, 2023, Korean species of the genus Amischa Thomson (Coleoptera: Staphylinidae Aleocharinae), with a description of new species, pp. 478-488 in Zootaxa 5230 (4) on pages 482-487, DOI: 10.11646/zootaxa.5230.4.5, http://zenodo.org/record/756410
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