Block partitions: an extended view

Given a sequence $S=(s_1,\dots,s_m) \in [0, 1]^m$, a block $B$ of $S$ is a subsequence $B=(s_i,s_{i+1},\dots,s_j)$. The size $b$ of a block $B$ is the sum of its elements. It is proved in [1] that for each positive integer $n$, there is a partition of $S$ into $n$ blocks $B_1, \dots , B_n$ with $|b_i - b_j| \le 1$ for every $i, j$. In this paper, we consider a generalization of the problem in higher dimensions

Data on the parasitoid complexes of Metallus pumilus (Hymenoptera: Tenthredinidae) and Emmetia heinemanni (Lepidoptera: Tischeriidae) mining leaves of Rubus sp.

251 Rubus leaves mined by three species of leaf miners, Metallus pumilus (Klug, 1816), Emmetia heinemanni (Wocke, 1871) and Ectoedemia rubivora (Wocke, 1860), were collected between 2011 and 2014 in order to rear out their parasitoids. No parasitoids have been reared out from Ectoedemia rubivora, but we have identifi ed 3 parasitoid species from Emmetia heinemanni and 5 species from Metallus pumilus. With 2 tables

New records of jumping plant-lice from Hungary (Hemiptera: Psylloidea)

Authors made regular insect collections between 2008 and 2015 especially on ornamental trees and shrubs, also on herbs, on streets, parks, in city greenery, forests, botanical gardens and private gardens, in various localities of Hungary. Trioza ilicina (De Stefani Perez), Ctenarytaina eucalypti (Maskell) and Ctenarytaina peregrina Hodkinson are reported for the first time in Hungary. New host, locality and habitat data are given

Recent data to the jumping plant-lice fauna of Hungary (Hemiptera: Psylloidea)

Authors made regular insect collections between 2010 and 2017, especially on ornamental trees and shrubs, on streets, parks, in city greenery, forests, botanical gardens and private gardens, in various localities of Hungary. Trioza soniae Rapisarda, 1994 and Trioza scottii Löw, 1880 are reported for the first time in Hungary. New host, locality and habitat data are given

CB2 Cannabinoid Receptors Contribute to Bacterial Invasion and Mortality in Polymicrobial Sepsis

BACKGROUND:Sepsis is a major healthcare problem and current estimates suggest that the incidence of sepsis is approximately 750,000 annually. Sepsis is caused by an inability of the immune system to eliminate invading pathogens. It was recently proposed that endogenous mediators produced during sepsis can contribute to the immune dysfunction that is observed in sepsis. Endocannabinoids that are produced excessively in sepsis are potential factors leading to immune dysfunction, because they suppress immune cell function by binding to G-protein-coupled CB(2) receptors on immune cells. Here we examined the role of CB(2) receptors in regulating the host's response to sepsis. METHODS AND FINDINGS:The role of CB(2) receptors was studied by subjecting CB(2) receptor wild-type and knockout mice to bacterial sepsis induced by cecal ligation and puncture. We report that CB(2) receptor inactivation by knockout decreases sepsis-induced mortality, and bacterial translocation into the bloodstream of septic animals. Furthermore, CB(2) receptor inactivation decreases kidney and muscle injury, suppresses splenic nuclear factor (NF)-kappaB activation, and diminishes the production of IL-10, IL-6 and MIP-2. Finally, CB(2) receptor deficiency prevents apoptosis in lymphoid organs and augments the number of CD11b(+) and CD19(+) cells during CLP. CONCLUSIONS:Taken together, our results establish for the first time that CB(2) receptors are important contributors to septic immune dysfunction and mortality, indicating that CB(2) receptors may be therapeutically targeted for the benefit of patients suffering from sepsis

New Quercus -infesting Bariella and Glyptacus species and redescription of Aceria cerrigemmarum (Nalepa) from Hungary (Acari: Prostigmata: Eriophyoidea)

Bariella bakonyense n. sp. and Glyptacus matrensis n. sp. were collected, described and illustrated from Quercus cerris and Quercus petraea , respectively. Both eriophyid mite species are leaf vagrant. Aceria cerrigemmarum was collected, redescribed and illustrated from Quercus cerris . This gall mite species causes bud proliferation and death of buds in several Hungarian forests. Two other eriophyid mite records are presented

First occurrence and description of Aceria fraxiniflora (Felt, 1906) (Acariformes: Eriophyoidea) from Europe

Korda, M., Csóka, Gy., Szabó, Á., Ripka, G. (2019): First occurrence and description of Aceria fraxiniflora (Felt, 1906) (Acariformes: Eriophyoidea) from Europe. Zootaxa 4568 (2): 293-306, DOI: https://doi.org/10.11646/zootaxa.4568.2.

Aceria fraxinivora

<i>Aceria fraxinivora</i> (Nalepa, 1909) <p>(Figs 13–17)</p> <p> <i>Eriophyes fraxinivorus</i> Nalepa, 1909: 117.</p> <p> <i>Phytoptus fraxini</i> Karpelles, 1884: 52, pl 1, Figs 9–11. Preoccupied.</p> <p> <i>E. fraxinivorus—</i> Nalepa, 1911: 241. pl. 4. Figs 10 a, b.</p> <p> <i>Aceria fraxinivora</i> — Roivainen, 1951: 8; Farkas, 1966: 30 –31, Fig. 17 D; Xue <i>et al.</i>, 2009: 474, 477–480, Figs 7–9.</p> <p> <i>Aceria fraxinivorus</i> (Nal.) — Keifer, 1952 no figure</p> <p> <b>Redescription. FEMALE</b>. Body pale yellow, vermiform, 241 (190–305, n = 7), 67 (60–69) wide, 70 (56–72) thick. Gnathosoma 28 (23–29), projecting obliquely downwards; chelicerae 23 (21–26), dorsal palp genual setae <i>d</i> 3 (3–4), unbranched, pedipalp coxal setae <i>ep</i> 3 (3–4). Prodorsal shield 39 (30–45), 44 (32–48) wide, subtriangular; with frontal lobe 2 (2–3); shield smooth or with two faint, incomplete admedian lines, diverging posteriorly, more widely separate on rear ¼; median line absent. Tubercles of scapular setae <i>sc</i> on rear shield margin, 23 (20–25) apart, diverging, scapular setae <i>sc</i> 34 (32–36), directed rearwards. Granules situated in lateral rows on epicoxal areas, i.e. laterally between shield margin and dorsal coxae of legs I and II.</p> <p> Legs with all usual segments and setae present. Leg I 38 (35–40), femur 11 (10–12), basiventral femoral seta <i>bv</i> 11 (10–12), genu 5 (5–6), antaxial genual seta <i>l’’</i> 28 (25–30), tibia 9 (9–10), paraxial tibial seta <i>l’</i> located at ¼– 2 ⁄5 from dorsal base, 4 (4–5), very thin, tarsus 8 (8–10), unguinal tarsal setae <i>u′</i> 4 (3–5), solenidion <i>ω</i> 9 (8–9), distally knobbed, slightly curved, empodium simple, bilaterally symmetrical, 7 (6–7), 4-rayed, each ray of three basal pairs with additional secondary branches.</p> <p> Leg II 35 (33–38), femur 10 (9–10), basiventral femoral seta <i>bv</i> 10 (9–10), genu 5 (4–5), antaxial genual seta <i>l’’</i> 8 (7–10) very thin, tibia 8 (7–8), tarsus 9 (8–9), unguinal tarsal setae <i>u′</i> 3 (3–4), solenidion <i>ω</i> 9 (8–10), distally knobbed, slightly curved, empodium simple, bilaterally symmetrical, 8 (7–8), 4-rayed, each ray of three basal pairs with small subdivisions.</p> <p> Coxigenital area with 5–6 microtuberculate semiannuli. Coxisternae I and II with several granules; anterior seta on coxisternum I, <i>1b</i> 7 (6–10), tubercles setae <i>1b</i> 11 (10–11) apart, proximal seta on coxisternum I, <i>1a</i> 24 (20– 26), tubercles setae <i>1a</i> 8 (8–9) apart, proximal seta on coxisternum II, <i>2a</i> 37 (32–38), tubercles setae <i>2a</i> 21 (19–24) apart. Subcapitular plate rounded. Prosternal apodeme 8 (8–9).</p> <p> Opisthosoma with 63 (50–66) dorsal, 61 (59–66) microtuberculate ventral semiannuli. Microtubercles oval dorsally and rounded ventrally. Last 6–10 dorsal annuli with tiny microtubercles on rear annular margin. Last 4–5 ventral annuli with linear microtubercles. Opisthosomal seta <i>c2</i> 23 (20–25), on annulus 10 (9–10), 55 (50–60) apart; opisthosomal seta <i>d</i> 68 (58–71), on annulus 21 (20–21), 32 (30–36) apart; opisthosomal seta <i>e</i> 18 (15–23), on annulus 37 (34–38), 18 (16–24) apart; opisthosomal seta <i>f</i> 28 (26–29), on annulus 57 (55–61), or 5 (4–5) from the rear, 21 (20–24) apart. Opisthosomal seta <i>h2</i> 82 (78–94), very thin at apex, 10 (10–11) apart; opisthosomal seta <i>h1</i> 5 (5–6), 8 (7–8) apart. Anal lobes normal in size and shape.</p> <p> Genital plate 19 (18–21), 23 (21–25) wide. Female genital coverflap with 10 (9–10) longitudinal ridges; coxisternal III setae <i>3a</i> 15 (12–18) apart, 11 (10–13), very thin.</p> <p> <b>NYMPH.</b> White, wormlike, 205–215 (n = 2), 65 thick. Gnathosoma 25–26. Prodorsal shield 31–33. Setae <i>sc</i> 25–26, pointing rear. Leg I 25–29, leg II 23–26. Opisthosoma with 52–56 dorsal, 47–54 ventral semiannuli. Dorsal and ventral semiannuli with minute microtubercles. Setae <i>c 2</i> 12–14, on annulus 8–10; setae <i>d</i> 40, on annulus 17– 20; setae <i>e</i> 10–11, on annulus 28–31; setae <i>f</i> 19–22, on annulus 43–50, or 4 from rear. Setae <i>h2</i> 66; setae <i>h1</i> 2; setae <i>3a</i> 10–12.</p> <p> <b>Host plant</b>. European ash, or Common ash, <i>Fraxinus excelsior</i> L. (fam. Oleaceae). European ash is a native tree species to Hungary.</p> <p> <b>Relationship to the host</b>. This mite caused distinct inflorescence and fruit deformation in the shape of a mass of globular sponge-like galls. The panicles swelled and distorted. The mite was found on the pubescent and lumpy samaras and remnants of panicles of the host (Fig. 17).</p> <p> <b>Hungarian locality</b>. Budapest (Central Hungary), district II, Törökvész út, street trees, 195 m, elev.; 47°31’44.2” N, 19°00’15.1” E.</p> <p> <b>Material examined</b>. The redescribed female circled with black ink among 5 females and one nymph on one slide, 3 April 2018, slide # 1439a; 6 females, 2 nymphs, one male, and one female and one male of <i>Tegolophus califraxini</i> (Keifer), and one female of <i>Aculus fraxini</i> (Nalepa) on slide # 1439b, coll. G. Ripka. Other specimens were collected by G. Ripka, from fruit galls of <i>Fraxinus angustifolia</i> Vahl in Budapest second district, 21 May 2018, slide # 1442a, containing 7 females and 2 nymphs. Other specimens were collected by Mr. M. Korda, from fruit galls of <i>Fraxinus ornus</i> L. in Sopron (Gyȏr-Moson-Sopron county), 21 June 2018, slides ## 1444a, b containing 30 females and 2 nymphs, and 25 females and one nymph, resp. which are in the corresponding author’s collection and deposited in the National Food Chain Safety Office, Directorate of Plant Protection, Soil Conservation and Agri-environment, Department of Pest Management Development and Coordination, Budapest, Hungary.</p> <p> <b>Differential diagnosis.</b> The morphometric differences are summarised in Table 1, but we especially draw attention to the length of setae <i>sc</i>: 17–25 in <i>A</i>. <i>fraxiniflora</i>, whereas it is 32–36 in <i>A</i>. <i>fraxinivora</i>. There is another marked difference in the length of seta <i>h2</i>, which is about twice as large in <i>A. fraxinivora</i> (78–94) as it is in <i>A. fraxiniflora</i> (25–40). We also note that the surface of the posterior dorsal opisthosomal and telosomal annuli differ, with the last 4–5 annuli almost smooth, with tiny or dot-like microtubercles in <i>A. fraxiniflora</i>, whereas 6–10 similar annuli are seen in <i>A</i>. <i>fraxinivora</i> (Table 1; J.W. Amrine, pers. comm.). Additionally, <i>A</i>. <i>fraxiniflora</i> has some design on the prodorsal shield, e.g. two admedian lines and a shallow and V-shaped line mesally on the rear margin between the admedians, whereas the majority of the examined specimens of <i>A</i>. <i>fraxinivora</i> have none, but some others have extremely faint lines.</p> <p> The relevant species causing leaf galls are easily separated from the inflorescence gall-formers. The most significant characteristics of the European leaf gall-inducer, <i>Aceria fraxinicola</i> (Nalepa), are the almost smooth dorsal annuli, the 3-rayed empodium, the absent or slightly visible seta <i>h1</i>, and the length of seta <i>3a</i> (20–28) (Nalepa 1890; Farkas 1966). The North American leaf gall-inducer, <i>Aceria fraxini</i> (Garman) can be differentiated from the two inflorescence and fruit gall-inducer <i>Aceria</i> spp. by the smooth genital coverflap, the netlike pattern prodorsal shield design, the 3-rayed empodium, the length of setae <i>3a</i> (18) and <i>h1</i> (1) (compare them with Table 1) (Baker <i>et al</i>. 1996).</p>Published as part of <i>Korda, M., Csóka, Gy., Szabó, Á. & Ripka, G., 2019, First occurrence and description of Aceria fraxiniflora (Felt, 1906) (Acariformes: Eriophyoidea) from Europe, pp. 293-306 in Zootaxa 4568 (2)</i> on pages 301-302, DOI: 10.11646/zootaxa.4568.2.5, <a href="http://zenodo.org/record/2599450">http://zenodo.org/record/2599450</a&gt

Aceria fraxiniflora

<i>Aceria fraxiniflora</i> (Felt, 1906) <p>(Figs 1–12)</p> <p> <i>Eriophyes fraxiniflora</i> Felt, 1906: 633 –634.</p> <p> <i>Eriophyes fraxinivorus americanus</i> Kendall, 1929: 308 –311, Fig. 4.</p> <p> <i>Aceria nimia</i> Hall, 1967: 638 –640, pl. 12.</p> <p> <i>Aceria fraxiniflora</i> (Felt) — Knihinicki & Boczek, 2002: 246 –247, likely misidentification.</p> <p> From <i>Fraxinus pennsylvanica</i>, Hungarian locality, Békésszentandrás, Hungary <i>(Figs 1–8)</i>.</p> <p> <b>FEMALE</b>. Body pale yellow and ochre, vermiform, 216 (180–248, n = 10), 44 (39–50) wide, 47 (37–54) thick. Gnathosoma 19 (16–22), projecting obliquely downwards; chelicerae 17 (16–20), dorsal palp genual setae <i>d</i> 3 (3–4), unbranched, pedipalp coxal setae <i>ep</i> 3 (3–4). Prodorsal shield 26 (24–27), 31 (26–40) wide, semicircular; shield pattern composed of two relatively faint admedian lines, diverging posteriorly, more widely separate on rear ¼, and two arched transverse lines on or close to the rear shield margin between admedians which resemble a shallow and obtuse V-shaped line; median line absent. Ornamentation of prodorsal shield is considerably variable, e.g. size of admedian lines, and the shield design weakly expressed: a part of the population with smooth prodorsal shield, almost without pattern. Tubercles of scapular setae <i>sc</i> on rear shield margin, 22 (20–24) apart, diverging, scapular setae <i>sc</i> 21 (17–23), directed rearwards. Granules situated in lateral rows on epicoxal areas, i.e. laterally between shield margin and dorsal coxae of legs I and II (<i>sensu</i> Chetverikov & Craemer 2015).</p> <p> Legs with all usual segments and setae present. Leg I (foreleg) 28 (25–30), femur 8 (7–8), basiventral femoral seta <i>bv</i> 8 (7–10), genu 5 (3–5), antaxial genual seta <i>l’’</i> 19 (16–22), tibia 5 (4–6), short paraxial tibial seta <i>l’</i> located at 2 ⁄5 from dorsal base, 3 (3–4), very thin, tarsus 6 (5–6), unguinal tarsal setae <i>u′</i> 3 (2–3), solenidion <i>ω</i> 7 (7–8), distally knobbed, slightly curved, empodium simple, bilaterally symmetrical, 5 (5–6), 4-rayed, each ray of three basal pairs with additional secondary branches. Trochanter with a small (0.5) and considerably stout spine ventrally near the femoral segment border.</p> <p> Leg II (rear leg) 25 (23–27), femur 7 (5–8), basiventral femoral seta <i>bv</i> 7 (6–8), genu 4 (3–4), antaxial genual seta <i>l’’</i> 5 (5–6) very thin, tibia 5 (3–5), tarsus 5 (4–6), unguinal tarsal setae <i>u′</i> 2 (2–3), solenidion <i>ω</i> 7 (7–8), distally knobbed, slightly curved, empodium simple, bilaterally symmetrical, 5 (5–6), 4-rayed, each ray of three basal pairs with small subdivisions. Trochanter with a small (0.5) and considerably stout spine ventrally near the femoral segment border.</p> <p> Coxigenital area with 8–9 microtuberculate semiannuli. Coxisternae I and II with several granules; anterior seta on coxisternum I, <i>1b</i> 7 (5–8), tubercles setae <i>1b</i> 11 (10–12) apart, proximal seta on coxisternum I, <i>1a</i> 25 (16– 29), tubercles setae <i>1a</i> 7 (7–8) apart, proximal seta on coxisternum II, <i>2a</i> 43 (39–49), tubercles setae <i>2a</i> 18 (18–20) apart. Subcapitular plate rounded. Prosternal apodeme 6 (5–6).</p> <p> Opisthosoma with 77 (69–85) dorsal, 70 (67–74) microtuberculate ventral semiannuli. Microtubercles oval dorsally and rounded ventrally. Last 4-5 dorsal annuli with minute microtubercles on rear annular margin. Last 6–7 ventral annuli with linear microtubercles. Opisthosomal seta <i>c2</i> 23 (20–27), on annulus 10 (9–11), 40 (33–45) apart; opisthosomal seta <i>d</i> 55 (50–59), on annulus 22 (19–24), 29 (26–33) apart; opisthosomal seta <i>e</i> 37 (32–42), on annulus 37 (32–41), 20 (17–23) apart; opisthosomal seta <i>f</i> 20 (17–23), on annulus 65 (57–69), or 5 (4–5) from the rear, 19 (18–20) apart. Opisthosomal seta <i>h2</i> 36 (35–40), very thin at apex, 10 (10–11) apart; opisthosomal seta <i>h1</i> 4 (3–5), 6 (5–7) apart. Anal lobes normal.</p> <p> Genital plate 15 (13–16), 19 (18–20) wide. Female genital coverflap with 12 (10–13) longitudinal ridges; coxisternal III setae <i>3a</i> 15 (14–16) apart, 8 (7–9), very thin.</p> <p> <b>NYMPH.</b> White, wormlike, 142–162 (n = 2), 35–52 thick. Gnathosoma 20–21. Prodorsal shield 24–25. Setae <i>sc</i> 11, pointing rear. Leg I 20, femur 5–7, basiventral femoral seta <i>bv</i> 2, genu 2, antaxial genual setae <i>l″</i> 15–18, tibia 3, paraxial tibial setae <i>l′</i> located at ¼– 2 ⁄5 from dorsal base, 2–3, very fine, tarsus 3–4, solenidion <i>ω</i> 5–6, slightly curved, distally knobbed, empodium simple, bilaterally symmetrical, 4, with 4 paired rays. Leg II 17, femur 4–5, basiventral femoral setae <i>bv</i> 3, very fine, genu 2–3, antaxial genual setae <i>l″</i> 2, very fine, tibia 2, tarsus 3, solenidion <i>ω</i> 5, slightly curved, distally knobbed, empodium simple, bilaterally symmetrical, 4, with 4 paired rays. Setae <i>1b</i> 5–6, setae <i>1a</i> 9–12, setae <i>2a</i> 25. Opisthosoma with 70–71 dorsal, 58–67 ventral semiannuli. Dorsal and ventral semiannuli with minute microtubercles. Setae <i>c 2</i> 8–10, on annulus 10–11; setae <i>d</i> 25–33, on annulus 22–23; setae <i>e</i> 10–17, on annulus 33–37; setae <i>f</i> 13–17, on annulus 53–63, or 4–5 from rear. Setae <i>h 2</i> 25–27; setae <i>h1</i> 2; setae <i>3a</i> 2–3.</p> <p> <b>Host plant</b>. Green ash, <i>Fraxinus pennsylvanica</i> Marshall (fam. Oleaceae). Green ash is the most widespread of the North American ash species, native to eastern and central North America, and an invasive transformer tree species in Hungary living in different plant associations, especially along rivers (Csiszár & Bartha, 2004). Green ash came to Europe in 1780, and around 1802 to Hungary (Csiszár & Bartha, 2004, Korda, 2018).</p> <p> <b>Relationship to the host</b>. This mite caused distinct inflorescence and fruit deformation in the shape of a mass of globular sponge-like galls. The panicles swelled and distorted. The mite was found in high number on the pubescent and lumpy samaras and remnants of panicles of the host (Figs 7–8).</p> <p> <b>Hungarian locality</b>. Békésszentandrás, Békés county (Southern Hungary), in a soft-wood gallery forest along river Hármas-Körös, 81 m elev., 46°54'0635'' N, 20°27'4234'' E.</p> <p> <b>Material examined</b>. The described and illustrated female circled with black ink among 21 females on one slide, 23 July 2017, slide # 1423a, coll. Mr. Márton Korda. Other specimens were collected by Mr. M. Korda in the same locality and time. The 2 slides (## 1423b, 1423c with described nymphs) were prepared from this material containing 30 females and 2 nymphs, and 25 females and 1 nymph, resp. from the fruits of the same host. Slides are in the corresponding author’s collection and deposited in the National Food Chain Safety Office, Directorate of Plant Protection, Soil Conservation and Agri-environment, Department of Pest Management Development and Coordination, Budapest, Hungary.</p> <p> From <i>Fraxinus americana</i>, North American locality, Terre Haute, Indiana, USA. <b> (<i>Figs 9–12)</i></b> </p> <p> <b>FEMALE</b>. Body yellowish white, vermiform, 216 (174–230, n = 9), 54 (50–60) wide, 52 (50–55) thick. Gnathosoma 19 (18–22), projecting obliquely downwards; chelicerae 17 (16–17), dorsal palp genual setae <i>d</i> 3 (3– 4), unbranched, pedipalp coxal setae <i>ep</i> 3 (3–4). Prodorsal shield 28 (25–28), 30 (25–30) wide, semicircular; with a small frontal lobe 2 (2–3); shield pattern composed of two relatively faint admedian lines, diverging posteriorly, more widely separate on rear ¼; median line absent. Ornamentation of prodorsal shield is considerably variable, e.g. size of admedian lines, and the shield design weakly expressed: a part of the population with smooth prodorsal shield, almost without pattern. Tubercles of scapular setae <i>sc</i> on rear shield margin, 21 (17–23) apart, diverging, scapular setae <i>sc</i> 21 (17–25), directed rearwards. Granules situated in lateral rows on epicoxal areas, i.e. laterally between shield margin and dorsal coxae of legs I and II.</p> <p> Legs with all usual segments and setae present. Leg I 26 (23–28), femur 7 (7–8), basiventral femoral seta <i>bv</i> 8 (7–10), genu 4 (3–4), antaxial genual seta <i>l’’</i> 18 (16–21), tibia 4 (3–5), short paraxial tibial seta <i>l’</i> located at 2 ⁄5 from dorsal base, 3 (2–3), very thin, tarsus 6 (5–6), unguinal tarsal setae <i>u′</i> 3 (2–3), solenidion <i>ω</i> 7 (7–8), distally knobbed, slightly curved, empodium simple, bilaterally symmetrical, 5 (5–6), 4-rayed.</p> <p> Leg II 23 (20–25), femur 6 (5–8), basiventral femoral seta <i>bv</i> 7 (6–8), genu 3 (3–4), antaxial genual seta <i>l’’</i> 5 (5–6) very thin, tibia 4 (3–4), tarsus 5 (4–5), unguinal tarsal setae <i>u′</i> 2 (2–3), solenidion <i>ω</i> 7 (7–8), distally knobbed, slightly curved, empodium simple, bilaterally symmetrical, 5 (5–6), 4-rayed.</p> <p> Coxigenital area with 7–8 microtuberculate semiannuli. Coxisternae I and II with several granules; anterior seta on coxisternum I, <i>1b</i> 8 (7–10), tubercles setae <i>1b</i> 11 (11–12) apart, proximal seta on coxisternum I, <i>1a</i> 25 (15– 28), tubercles setae <i>1a</i> 8 (7–8) apart, proximal seta on coxisternum II, <i>2a</i> 40 (36–41), tubercles setae <i>2a</i> 20 (19–20) apart. Subcapitular plate rounded. Prosternal apodeme 6 (5–6).</p> <p> Opisthosoma with 74 (65–79) dorsal, 70 (64–74) microtuberculate ventral semiannuli. Rounded microtubercles dorsally and ventrally. Last 4–5 dorsal annuli with minute microtubercles on rear annular margin. Last 6–7 ventral annuli with linear microtubercles. Opisthosomal seta <i>c2</i> 18 (13–18), on annulus 10 (10–11), 41 (40–50) apart; opisthosomal seta <i>d</i> 52 (45–54), on annulus 22 (21–23), 29 (25–34) apart; opisthosomal seta <i>e</i> 39 (25–40), on annulus 39 (36–41), 20 (13–21) apart; opisthosomal seta <i>f</i> 20 (17–20), on annulus 65 (59–68), or 5 (4– 5) from the rear, 19 (15–21) apart. Opisthosomal seta <i>h2</i> 30 (25–33), very thin at apex, 11 (10–11) apart; opisthosomal seta <i>h1</i> 5 (4–6), 6 (5–6) apart. Anal lobes normal.</p> <p> Genital plate 15 (13–16), 19 (18–22) wide. Female genital coverflap with 12 (10–13) longitudinal ridges; coxisternal III setae <i>3a</i> 15 (14–16) apart, 7 (5–9), very thin.</p> <p> <b>NYMPH.</b> White, wormlike, 123–167 (n = 2), 42 wide, 38 thick. Gnathosoma 17–20; chelicerae 13. Prodorsal shield 22–25, 25–27 wide, semicircular. Setae <i>sc</i> 15–17, 17 apart, pointing rear. Leg I 18–20, leg II 16–17. Setae <i>1b</i> 4, 7 apart, setae <i>1a</i> 10–11, 5 apart, setae <i>2a</i> 19–22, 13 apart. Opisthosoma with 57–60 dorsal, 57–59 ventral semiannuli. Dorsal annuli with minute and slightly elongate, and ventral semiannuli with tiny microtubercles. Setae <i>c 2</i> 8–10, on annulus 9–10; setae <i>d</i> 14–18, on annulus 20–21; setae <i>e</i> 8–10, on annulus 32–34; setae <i>f</i> 11–13, on annulus 52–55, or 4–5 from rear. Setae <i>h 2</i> 20–23; setae <i>h1</i> 3–4; setae <i>3a</i> 2–3.</p> <p> <b>Host plant</b>. White ash or Biltmore ash, <i>Fraxinus americana</i> L. (fam. Oleaceae) is native to eastern North America, and is a rapidly growing tree suited to parkland plantings, where cultivars selected for yellow, orange or bronze autumn colour are highly valued (Anonym 2018). White ash is an introduced but not invasive tree species in Hungary (Korda, 2018). White ash came to Europe in 1724, and in 1798 to Hungary (Csiszár & Bartha, 2004).</p> <p> <b>Relationship to the host</b>. This mite caused distinct inflorescence and fruit deformation in the shape of globular sponge-like and rough-surface galls of 1 cm in diameter. The panicles swelled and distorted. The mite was found in high numbers on the lumpy samaras and remnants of panicles of the host.</p> <p> <b>Locality</b>. Terre Haute, Indiana, USA, 39.461539 N, - 87.418746 E.</p> <p> <b>Material examined</b>. The examined female circled with black ink among 4 females, 2 nymphs and one male on one slide, 9 July 2018, slide #1446a, coll. Dr. James W. Amrine. Other specimens were collected in the same locality and time, slide # 1446b, was prepared from this material containing 11 females and one nymph from the fruits of the same host. Slides are in the corresponding author’s collection and deposited in the National Food Chain Safety Office, Directorate of Plant Protection, Soil Conservation and Agri-environment, Department of Pest Management Development and Coordination, Budapest, Hungary.</p>Published as part of <i>Korda, M., Csóka, Gy., Szabó, Á. & Ripka, G., 2019, First occurrence and description of Aceria fraxiniflora (Felt, 1906) (Acariformes: Eriophyoidea) from Europe, pp. 293-306 in Zootaxa 4568 (2)</i> on pages 295-300, DOI: 10.11646/zootaxa.4568.2.5, <a href="http://zenodo.org/record/2599450">http://zenodo.org/record/2599450</a&gt