STRUCTURAL ELUCIDATION OF GLYCOSIDES FROM THE SEEDS OF Entada phaseoloides GROWING IN THUA THIEN HUE

Entada phaseoloides (L.) Merr. belongs to Fabaceae family and widely distributes throughout Vietnam, Thailand, Malaysia, Indonesia, Philippines, China, New Guinea, and Australia. In Vietnamese traditional medicine, the seeds of Entada phaseoloides were used for the treatment of stomachache, haemorrhoids, and hernia diseases. In this article, we report the isolation and structural elucidation of four glycosides from the water extract of seeds of E. phaseoloides including phaseoloideside C (1), phaseoloideside E (2), acanthoside D (3), and 1-(3,4,5-trimethoxyphenyl)prop-7-en-9-ol-O-(6ʹʹ-O-α-L-arabinopyranosyl)-β-D-glucopyranoside (4). To the best of our knowledge, compounds 3-4 were isolated from E. phaseoloides for the first time

Megastigmans and other compounds from Antidesma hainanensis Merr.

Four megastigmans 7-megastigmene-3-ol-9-one 3-O-[α-L-arabinofuranosyl-(1→6)-β-D-glucopyranoside]  (1),  alangionoside L (2),  alangioside (3), ampelopsisionoside (4), and other constituents as N–trans-feruloyloctopamide (5), trans-linalool-3,6-oxide-β-D-glucopyranoside (6),  5α,8α-dipioxiergosta-6,22-diene-3β-ol (7), and (Z)-2-hexenyl β-D-glucopyranoside (8) were isolated from the methanol extract of the Antidesma hainanensis leaves. Their chemical structures were successfully determined using NMR and ESI-MS analysis as well as in comparison with the reported data. This is the first report of these compounds from Euphorbiaceae family

Pisachini planthoppers of Vietnam: new records of Pisacha and a new Goniopsarites species from Central Vietnam (Hemiptera, Fulgoromorpha, Nogodinidae)

Two planthopper species of the family Nogodinidae are added to the fauna of Vietnam, both from two localities in Thua Thien-Hue Province: Bach Ma National Park and Phong Dien District. The first species belongs to Goniopsarites Meng, Wang & Wang, 2014, G. mientrunganus Constant & Pham, sp. nov., and the second belongs to Pisacha Distant, 1906, P. yinggensis Meng, Wang & Wang, 2014. Pisacha yinggensis was previously recorded from Hainan Island, China. These new records greatly extend the distribution of both genera, which were known from southern China, Hainan and North Vietnam, to the south, reaching the mid area of Central Vietnam. Sexual dimorphism is reported in P. yinggensis for the first time. Illustrations of habitus and male terminalia of the new species are given as well as distribution maps and photographs of live specimens and their habitat. The family Nogodinidae now comprises nine species in Vietnam, with three of them present in Bach Ma National Park

GLYCOSIDES ISOLATED FROM THE AERIAL PARTS OF Premna integrifolia L. GROWING IN THAI BINH

From the aerial parts of Premna integrifolia L., three glycosides acteoside (1), premnaodoroside A (2), and premnaodoroside B (3) were isolated. Their chemical structures were elucidated by means of ESI-MS, 1H-NMR, 13C-NMR, HSQC, HMBC spectra and in comparison with the previous literature. To our best knowledge, this is the first report of 1 and 3 from P. integrifolia

Retrieval of Aerosol Optical Depth Using Satellite Data Associated with Ground-based Observations over Urban and Rural Areas

Optičku je dubinu aerosola (AOD) moguće točno izračunati na temelju uzastopnih mjerenja izravnog i difuznog Sunčeva zračenja na tlu. Međutim, prostorna pokrivenost i frekvencija lokacije uzrokuju određena ograničenja. Stoga su satelitske snimke ispravan alat za dobivanje proizvoda optičke dubine aerosola s više prostornih informacija i obrazaca raspodjele aerosola. Daljinskim istraživanjima aerosola možemo bolje razumjeti najbolji pristup računanju optičke dubine aerosola u urbanim i ruralnim područjima i mogu se uočiti razlike zbog svojstava površinske reflektivnosti. Ovaj se članak bavi konceptima smanjenja kontrasta i pristupima tamnih meta koji se ispituju snimkama Landsata i opažanjima Sunčevog fotometra za povezivanje raspodjele optičke dubine aerosola iznad grada Taipeija u Tajvanu. Za područja sa svijetlim površinama kao što su gradovi navedeni se koncepti primjenjuju metodom koeficijenta disperzije zajedno sa Sunčevim fotometrom kako bi se u velikoj mjeri smanjile pogreške. Za razliku od toga, algoritam tamne mete s odnosom površinske refleksije između plavih (0,49 μm), crvenih (0,66 μm) i infracrvenih (2,1 μm) spektralnih pojaseva prikladan je za vlažno tlo i područja s vegetacijom. Računanje prostorne raspodjele optičke dubine aerosola uspoređuje se s proizvodima MODIS AOD-a i AERONET-a kako bi se provjerila točnost rezultata. RMSE je bio u rasponu od 0,2 do 0,4 i oko 50% podataka bilo je unutar granica očekivane pogreške (EE=± (0,05+0,15 AODsunphometer).Aerosol optical depth (AOD) can be retrieved accurately with sequential ground-based measurements of direct and diffuse solar radiance. However, spatial coverage and location frequency cause certain limitations. Hence, satellite image data are a proper tool for obtaining aerosol optical depth products with more spatial information and patterns of aerosol distribution. Currently, aerosol remote sensing may enhance our understanding of the optimal approach to AOD retrieval over urban and rural areas, and how it differs due to the characteristics of surface reflectivity. The article deals with the concepts of contrast reduction, and dark target approaches are examined using Landsat imaging and the observation of a sun photometer for integrating aerosol optical depth distribution over the city of Taipei in Taiwan. For areas with bright surfaces, such as urban areas, the above concepts were applied using the dispersion coefficient method with a sun photometer, in order to reduce errors considerably in the product. In contrast, a dark target algorithm with a relationship of surface reflectance between the blue (0.49 μm), red (0.66 μm), and infrared (2.1 μm) spectral bands is suitable for moist soils and vegetation areas. The retrieval of AOD spatial distribution is compared with MODIS AOD products and AERONET to verify the accuracy of the results. The RMSE ranged from 0.2 to 0.4, and about 50% of the data were within expected error margins (EE=± (0.05+0.15 AODsunphotometer)

Flavonoid glycosides from Antidesma ghaesembilla

Four flavone glycosides were isolated from the leaves of Antidesma ghaesembilla. They were elucidated to be vitexin, orientin, isovitexin, and homoorientin by 1D- and 2D-NMR and in comparison with literature data. These compounds have been reported from the genus Antidesma for the first time

Criotettix bispinosus

<i>Criotettix bispinosus</i> (Dalman, 1818) <p>(Figs. 4, 5)</p> <p> <i>Acrydium bispinosum</i> Dalman, 1818: 77.</p> <p> <i>Acridium</i> (<i>Tetrix</i>) <i>bispinosum</i> — Haan, 1843: 169.</p> <p> <i>Criotettix bispinosus</i> [refer to OSF for complete literature]— Bolívar, 1887: 226; Günther, 1937a: 179; Tinkham, 1937: 230; Günther, 1937b: 121–122; Günther, 1939: 319; Shishodia, 1991: 36; Blackith, 1992: 34; Mahmood <i>et al.</i>, 2007: 1281; Benediktov. 2013: 257 (vibrational signalling); Tumbrinck, 2015: 276; Deng <i>et al.</i>, 2023: 208.</p> <p> <i>Acanthalobus bispinosus</i> — Hancock, 1907b: 29; Kirby 1910: 16; Kirby, 1914: 37; Karny, 1915: 78; Hancock, 1915: 93; Willemse, 1930: 18.</p> <p> <i>Criotettix brachynotus</i> Zheng & Jiang, 1994: 34; synonymized by Deng, 2021: 455.</p> <p> <i>Formosatettix hainanensis</i> Zheng, 2012: 2; synonymized by Deng <i>et al.</i>, 2023: 2008.</p> <p> <i>Tettix latispina</i> Walker, 1871: 837; synonymized by Kirby, 1910: 18.</p> <p> <i>Acanthalobus longinotus</i> Hancock, 1907a: 221; synonymized by Blackith, 1992: 35.</p> <p> <i>Tettix simplex</i> Walker, 1871: 836; synonymized by Kirby, 1910: 18.</p> <p> <b>Material examined.</b> VIETNAM, Th ừa Thiên Hu ễ province, Bạch Mã National Park: •1Ô, 1♀; road-side vegetation along road to summit, N16.24626 E107.86881, 85.9± 6.1 m.a.sl., 7 March 2023, 9h16; on a leaf of a shrub; coll. M.K. Tan & V. T. Trung; VIET. 23.12, 13 (ZRC) • 1♀; road-side vegetation along road to summit, N16.24198 E107.86661, 144.7± 6.9 m.a.s.l.; 7 March 2023, 10h09; on a rock with flowing water; coll. M.K. Tan & V. T. Trung; VIET.23.15 (VNMN) • 3Ô; open stream near Bạch Mã National Park, N16.22036 E107.88702, 72.9± 6.3 m.a.s.l.; 8 March 2023, 11h01; on boulders and rocks; coll. M.K. Tan & V. T. Trung; VIET.23.39–41 (ZRC) (Fig. 5).</p> <p> <b>Ecology.</b> This species was found along rivers, residing on rocks and substrate near the fast-flowing water. However, it has also been found on more vegetated area along road.</p> <p> <b>Distribution.</b> India, Myanmar, South China (including Hainan), Thailand, Vietnam, Peninsular Malaysia, and Indonesia (the Greater Sunda Islands).</p> <p> <b>Type locality.</b> Oriental region (without definite locality).</p>Published as part of <i>Tan, Ming Kai, Vu, Trung Thanh, Le, Cuong Viet Canh & Pham, Thai Hong, 2023, Pygmy grasshoppers (Orthoptera: Tetrigidae) from B ạch Mã National Park, central Vietnam, pp. 199-223 in Zootaxa 5319 (2)</i> on pages 202-204, DOI: 10.11646/zootaxa.5319.2.3, <a href="http://zenodo.org/record/8182415">http://zenodo.org/record/8182415</a&gt

Miriatroides luna Tan & Storozhenko 2023, sp. nov.

<i>Miriatroides luna</i> Tan & Storozhenko, sp. nov. <p>(Figs. 15, 16)</p> <p> <b>Material examined.</b> VIETNAM, Th ừa Thiên Hu ễ province, Bạch Mã National Park: •Ô holotype; Summit Trail (forest trail), N16.19667 E107.86169, 1428.0± 5.8 m.a.s.l.; 7 March 2023, 20h15; hiding among rotten tree trunk on the ground; coll. M.K. Tan & V. T. Trung; VIET.23.17 (VNMN) (Figs. 15, 16).</p> <p> <b>Diagnosis.</b> This new species is most similar to <i>Miriatroides kannackiensis</i> Storozhenko, 2016 from Gia Lai Province, but differs from latter (as well as from all other congeners) by the rostrum more projected in lateral view and the fore femur with margins (especially ventral margin) undulated.</p> <p> <b>Etymology.</b> This species is named after the moon (in Latin, luna = moon), as the holotype was collected near the summit on a clear night with a full moon.</p> <p> <b>Description.</b> Habitus as shown in Figs. 15, 16A, 16B. Different shades of brown, ranging from pale brown, and dark brown to red brown, well camouflaged against leaf litter and tree trunk on the ground.</p> <p>Head: In frontal view (Fig. 16C): antennal groove inserted below lower margin of eyes. Fastigium convex; sinuosoidal on anterior border. Face with numerous nodules. Frontal costa elongated. Bifurcation of frontal costa in line with middle of eye. Facial carinae faintly sinusoidal. Compound eyes hemispheric, not exerted above vertex, 1.55 times taller than wide. Lateral ocelli slightly ventral of bifurcation of frontal costa and slightly above antennal groove. In dorsal view (Fig. 16A): apex of fastigium clearly surpasses frontal margin of eyes, emarginated in the middle. Vertex 1.53 times wider than eye width. Lateral carinae of fastigium not distinct; median carina well surpassing apex of fastigium. In lateral view: frontal costa arched and well protruding in front of eyes. Mouthparts mostly brown to grey with small pale-coloured nodules. Maxillary palps pale coloured with tint of grey; with segments stout and apical segment somewhat oval.</p> <p>Pronotum: Pronotum reaching apex of posterior knee, 2.03 times longer than wide (pronotal lateral lobe width). In lateral view (Fig. 16B): with median, humero-apical, and interhumeral carinae irregularly undulated. Infrascapular area broad. Angle of ventral sinus between lateral shoulder and lateral lobe acute. In dorsal view (Fig. 16A): median carina distinct throughout length of pronotum, flanked by a network of irregular carinae. Lateral carinae distinct. Interhumeral carina distinct, diverging posteriorly. In dorsal view (Fig. 16A), lower margin of lateral lobe of pronotum leaf-shaped. Apical end of pronotal disc acute.</p> <p>Legs (Figs. 16A, 16B): Fore and middle legs: generally brown with either dark- or light-coloured bands. Fore femur with distinct dorsal carina straight, with ventral carina undulated, forming three nodules. Middle femur with less distinct dorsal and ventral carinae, clearly not undulating; lateral external carina undulated, forming two or three small nodules. Hind legs: posterior femur about 3.36 times longer than wide, about 1.34 times longer than hind tibia; with clear carinae along dorsal margin. Knee of hind femur with antegenicular tooth small but acute, genicular tooth rounded. Posterior tibia dark coloured anteriorly, becoming slightly lighter in colouration; with five spines on each lateral margin, with numerous spinules between these large dorsal spines. Basal article of hind tarsus generally pale coloured, 0.78 times as long as apical article; middle article dark coloured and very short; apical article white, except apex being black.</p> <p>Abdomen: Tergites and sternites typically dark coloured with some sparse patches of pale spots. Subgenital plate triangular (Figs. 16D, 16E).</p> <p> <b>Measurements (in mm).</b> PL = 7.17; PW = 3.54; PH = 1.20; HWL = NA; HFL = 4.53; HFW = 1.35; TL = NA; VW = 0.55; EW = 0.36; SW = 0.14; IAH = 0.52; BL = 7.34; PAW = 1.47; PPW = 2.16; MAL =?; MAW =?; 1 stAW = 0.18; TW = NA; FFL = 1.70; FFW = 0.55; MFL = 1.93; MFW = 0.44; HTL = 3.37; 1 st TaL = 0.49; 3 rd TaL = 0.63; SGPL = 0.56; SGPW = 0.59.</p> <p> <b>Ecology.</b> Only one specimen was encountered staying still and camouflaging itself in a decaying wood on the ground of a sheltered montane forest habitat at high altitude of Bạch Mã National Park (Fig. 3). Upon disturbance, it remained still.</p> <p> <b>Distribution.</b> So far known only from type locality.</p> <p> <b>Type locality.</b> Vietnam, Th ừa Thiên Hu ễ Province, B ạch Mã National Park.</p>Published as part of <i>Tan, Ming Kai, Vu, Trung Thanh, Le, Cuong Viet Canh & Pham, Thai Hong, 2023, Pygmy grasshoppers (Orthoptera: Tetrigidae) from B ạch Mã National Park, central Vietnam, pp. 199-223 in Zootaxa 5319 (2)</i> on pages 212-215, DOI: 10.11646/zootaxa.5319.2.3, <a href="http://zenodo.org/record/8182415">http://zenodo.org/record/8182415</a&gt

Tegotettix bufocrocodil

<i>Tegotettix bufocrocodil</i> (Storozhenko & Dawwrueng, 2015) <p>(Figs. 8–10)</p> <p> <i>Gavialidium bufocrocodil</i> Storozhenko & Dawwrueng, 2015: 540.</p> <p> <i>Gavialidium bufocrocodil —</i> Storozhenko, 2018b: 19.</p> <p> <i>Tegotettix bufocrocodil</i> — Muhammad <i>et al.</i>, 2018: 31.</p> <p> <b>Material examined.</b> VIETNAM, Th ừa Thiên Hu ễ province, Bạch Mã National Park: •1Ô, 4♀, 3 nymphs; along stream near Bạch Mã National Park, N16.22419 E107.88233, 57.4± 4.5 m.a.s.l.; 8 March 2023, 19h37; on a tree trunk; coll. M.K. Tan & V. T. Trung; VIET. 23.42–49 (ZRC) •1Ô; forest near Bạch Mã National Park, N16.22069 E107.88253, 74.9± 6.5 m.a.s.l.; 9 March 2023, 21h11; on a tree trunk; coll. M.K. Tan & V. T. Trung; VIET.23.73 (VNMN).</p> <p> <b>Remarks.</b> This represents the first record of this species in Vietnam.</p> <p> <b>Ecology.</b> This species was found along forest edge not too far from a river and dwelling among tree trunks, often staying still and camouflaging among the crevices (Figs. 8–10). Adults and nymphs can be found aggregating together on a few trees.</p> <p> <b>Distribution.</b> Thailand: Nakhon Ratchasima and Trat Provinces; Cambodia: Sen Monorom; Vietnam: Thừa Thiên Huễ Province [new].</p> <p> <b>Type locality.</b> Thailand, Nakhon Ratchasima Province, Khao Yai.</p>Published as part of <i>Tan, Ming Kai, Vu, Trung Thanh, Le, Cuong Viet Canh & Pham, Thai Hong, 2023, Pygmy grasshoppers (Orthoptera: Tetrigidae) from B ạch Mã National Park, central Vietnam, pp. 199-223 in Zootaxa 5319 (2)</i> on page 205, DOI: 10.11646/zootaxa.5319.2.3, <a href="http://zenodo.org/record/8182415">http://zenodo.org/record/8182415</a&gt

Bolivaritettix sculptus

<i>Bolivaritettix sculptus</i> (Bolívar, 1887) <p>(Fig. 14)</p> <p> <i>Mazarredia sculpta</i> Bolívar, 1887: 237.</p> <p> <i>Mazarredia sculpta —</i> Hancock, 1907b: 32; Kirby, 1914: 51; Hancock, 1915: 100; Bolívar, 1917: 285.</p> <p> <i>Bolivaritettix sculptus</i> — Günther, 1939: 59; Shishodia, 1991: 82; Blackith, 1992: 12; Paris, 1994: 249; Deng <i>et al.</i>, 2009: 282; Deng <i>et al.</i>, 2010: 48; Storozhenko & Dawwrueng, 2015: 533; Ding <i>et al.</i>, 2018: 311; Storozhenko, 2018a: 18; Bhaskar <i>et al.</i>, 2022: 422.</p> <p> <i>Mazarredia indotata</i> Bolívar, 1909: 398; synonymized by Günther, 1939: 59.</p> <p> <b>Material examined.</b> VIETNAM, Th ừa Thiên Hu ễ province, Bạch Mã National Park: • 1♀; Summit Trail (forest trail), N16.19735 E107.86131, 1401.0±6.0 m.a.s.l.; 7 March 2023, 11h42; on clayey rock; coll. M.K. Tan & V. T. Trung; VIET.23.16 (ZRC) (Fig. 14).</p> <p> <b>Ecology.</b> The colouration of this species allows it to camouflage among orange clayey rock where it was found.</p> <p> <b>Distribution.</b> India, China, Myanmar, Cambodia, Thailand, Vietnam: provinces Gia Lai, Vĩnh Phúc, Bình Phýớc, Đắk Lắk, and Thừa Thiên Huễ [new].</p> <p> <b>Type locality.</b> Vietnam, Gia Lai Province, Buon Luoi.</p>Published as part of <i>Tan, Ming Kai, Vu, Trung Thanh, Le, Cuong Viet Canh & Pham, Thai Hong, 2023, Pygmy grasshoppers (Orthoptera: Tetrigidae) from B ạch Mã National Park, central Vietnam, pp. 199-223 in Zootaxa 5319 (2)</i> on page 212, DOI: 10.11646/zootaxa.5319.2.3, <a href="http://zenodo.org/record/8182415">http://zenodo.org/record/8182415</a&gt