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1.
Sci Total Environ ; 750: 141507, 2021 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-32841807

RESUMO

Studies on the occurrence of emerging pesticides in surface and drinking water in Vietnam are limited. In this study, lake water (n = 7), river water (n = 1), tap water (n = 46), and bottled water (n = 3) collected from Hanoi and other four provinces in northern Vietnam were analyzed for selected pesticides (including insecticides such as neonicotinoids, fipronil, and chlorpyrifos; fungicide carbendazim; herbicides such as atrazine, terbuthylazine, simazine, 2,4-dichlorophenoxyacetic acid, 2-methyl-4-chlorophenoxyacetic acid, and bentazon) and some of their degradates by liquid chromatography-tandem mass spectrometry. Carbendazim (median: 86.7 ng/L) and triazines (49.3 ng/L) were the major pesticides found in lake water samples, followed by neonicotinoids and their degradation products (15.1 ng/L), chlorpyrifos and its degradate (13.4 ng/L), fipronil and its degradates (3.76 ng/L), chlorophenoxy acid herbicides (2.10 ng/L), and bentazon (0.62 ng/L). Triazines (164 ng/L) were the major pesticides in river water. Higher concentrations (median: 39.3 ng/L; range: 1.20-127) of selected pesticides were found in tap water from Hanoi than those from four other provinces studied (5.49 ng/L; 4.73-66.8 ng/L). Bottled water samples collected from Hanoi contained lower concentrations of pesticide residues (median: 3.54 ng/L, range: 2.18-8.09) than those of tap water samples. The calculated risks from pesticide exposure through ingestion of tap water by the general populations were low. However, fipronil concentrations in lake water exceeded the benchmark value recommended for freshwater in the United States or the Netherlands. Degradation of acetamiprid into desmethyl-acetamiprid was found in lake water.


Assuntos
Clorpirifos , Água Potável , Herbicidas , Praguicidas , Poluentes Químicos da Água , Benzimidazóis , Benzotiadiazinas , Carbamatos , Água Potável/análise , Herbicidas/análise , Neonicotinoides , Países Baixos , Praguicidas/análise , Pirazóis , Vietnã , Poluentes Químicos da Água/análise
2.
GM Crops Food ; 12(1): 71-83, 2021 Jan 02.
Artigo em Inglês | MEDLINE | ID: mdl-32997586

RESUMO

This study assessed the farm-level economic and environmental impacts from the use of genetically modified (GM) corn in Vietnam (resistant to Lepidopteran pests of corn and tolerant to the herbicide glyphosate). It was largely based on a farmer survey conducted in 2018-19. The GM varieties out-performed conventional varieties in terms of yield by +30.4% (+15.2% if the yield comparison is with only the nearest performing equivalent conventional varieties) and reduced the cost of production by between US $26.47 per ha and US $31.30 per ha. For every extra US $1 spent on GM seed relative to conventional seed, farmers gained between an additional US $6.84 and US $12.55 in extra income. The GM maize technology also reduced insecticide and herbicide use. The average amount of herbicide active ingredient applied to the GM crop area was 26% lower (1.66 kg per ha) than the average value for the conventional corn area (2.26 kg/ai per ha) and in terms of the associated environmental impact of the herbicide use, as measured by the Environmental Impact Quotient (EIQ) indicator, it was lower by 36% than the average value applicable to the conventional corn area. Insecticides were used on a significantly lower GM crop area and, when used, in smaller amounts. The average amount of insecticide applied to the GM corn crop was significantly lower by 78% (0.08 kg/ai per ha) than the average value for the conventional corn area (0.36 kg/ai per ha) and in terms of the associated environmental impact of the insecticide use, as measured by the EIQ indicator, it was also lower by 77% than the average value for conventional corn (14.06 per ha).


Assuntos
Produtos Agrícolas/genética , Zea mays/genética , Fazendas , Plantas Geneticamente Modificadas/genética , Inquéritos e Questionários , Vietnã
3.
Food Chem ; 334: 127553, 2021 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-32688177

RESUMO

Rice is one of the most important cereals for human nutrition and is a basic staple food for half of the global population. The assessment of rice geographical origins in terms of its authenticity is of great interest to protect consumers from misleading information and fraud. In the present study, a head space gas chromatography mass spectrometry (HS-GC-MS) strategy for characterising volatile organic compounds (VOCs) profiles to distinguish rice samples from China, India and Vietnam is described. Partial Least Square Discriminant Analysis (PLS-DA) model exhibited a good discrimination (R2 = 0.98182, Q2 = 0.9722, and Accuracy = 1.0) for rice samples from China, India and Vietnam. Moreover, Data-Driven Soft Independent Modelling of Class Analogy (DD-SIMCA) and K-nearest neighbors shown good specificity 100% and accuracy 100% in identifying the origin of samples. The present study established VOC fingerprinting as a highly efficient approach to identify the geographical origin of rice.


Assuntos
Oryza/química , Compostos Orgânicos Voláteis/análise , China , Análise Discriminante , Cromatografia Gasosa-Espectrometria de Massas , Índia , Análise dos Mínimos Quadrados , Oryza/metabolismo , Microextração em Fase Sólida , Vietnã , Compostos Orgânicos Voláteis/química , Compostos Orgânicos Voláteis/isolamento & purificação
4.
BMC Infect Dis ; 20(1): 809, 2020 Nov 05.
Artigo em Inglês | MEDLINE | ID: mdl-33153450

RESUMO

BACKGROUND: Antimicrobial resistance (AMR) in Neisseria gonorrhoeae is an emerging global health threat. Surveillance of AMR in N. gonorrhoeae in the Western Pacific Region is important, as resistant strains have typically emerged from this region. There are sparse data regarding antibiotic susceptibility of N. gonorrhoeae from Vietnam. This study aimed to provide updated data on antibiotic susceptibilities in N. gonorrhoeae isolates from Hanoi, Vietnam. METHODS: From 2017 to 2019, 409 N. gonorrhoeae clinical isolates were collected at the National Hospital for Venereology and Dermatology in Hanoi, Vietnam. Antibiotic susceptibility testing was performed by disk diffusion method according to the Clinical and Laboratory Standards Institute (CLSI) protocol. The zone diameters of inhibition were recorded and interpreted according to standard CLSI criteria, except for azithromycin, due to the absence of CLSI interpretation. Categorical variables were analyzed by Chi-square and Fisher's exact tests. Linear regression was used to evaluate zones of inhibition by year. RESULTS: Among the 409 isolates, no isolates were susceptible to penicillin, 98.3% were resistant to ciprofloxacin, and all isolates were susceptible to spectinomycin. There were 122/407 (30.0%) isolates resistant to azithromycin and there was an association between resistance and year (p <  0.01), ranging from 15.3% of isolates in 2017 to 46.7% of the isolates in 2018. Resistance to cefixime was found in 13/406 (3.2%) of isolates and there was no association by year (p = 0.30). Resistance to ceftriaxone occurred in 3/408 (0.7%) of isolates. Linear regression indicated the zone of inhibition diameters decreased by 0.83 mm each year for ceftriaxone (95% CI: - 1.3, - 0.4; p <  0.01) and decreased by 0.83 mm each year (95% CI: - 1.33, - 0.33; p <  0.01) for azithromycin; the association was not significant for cefixime (p = 0.07). CONCLUSIONS: We found decreasing susceptibility of N. gonorrhoeae to ceftriaxone and azithromycin, as well as a high prevalence of resistance to azithromycin, among isolates in Hanoi, Vietnam from 2017 to 2019. The trends of decreasing susceptibility to first-line treatments are concerning and highlight the urgency of addressing antimicrobial resistance in N. gonorrhoeae. Expanded surveillance efforts within the Western Pacific Region are critical to monitoring trends and informing treatment guidelines.


Assuntos
Antibacterianos/uso terapêutico , Azitromicina/uso terapêutico , Ceftriaxona/uso terapêutico , Farmacorresistência Bacteriana/efeitos dos fármacos , Gonorreia/tratamento farmacológico , Neisseria gonorrhoeae/efeitos dos fármacos , Adolescente , Adulto , Idoso , Feminino , Gonorreia/epidemiologia , Gonorreia/microbiologia , Humanos , Laboratórios , Masculino , Testes de Sensibilidade Microbiana , Pessoa de Meia-Idade , Neisseria gonorrhoeae/isolamento & purificação , Vietnã/epidemiologia , Adulto Jovem
5.
J Infect Dev Ctries ; 14(10): 1125-1127, 2020 Oct 31.
Artigo em Inglês | MEDLINE | ID: mdl-33175706

RESUMO

Sharing a common land border with China, Vietnam has faced a high risk of transmission of Coronavirus Disease 2019 (COVID-19). Rapid decision making and robust public health measures were established by the Vietnamese Government to control the situation. As of 17 May 2020, Vietnam reported 320 total confirmed cases of COVID-19, of whom 260 had fully recovered, while the remaining 60 cases were still under treatment. Noteworthy, the current data still confirms zero deaths and within the last 32 consecutive days prior to this submission, there have been no new infections in the country. Valuable lessons from Severe Acute Respiratory Syndrome in 2003 such as use of quarantine, early recognition and quick response to the infection, and increased awareness of its citizens have put Vietnam in a somewhat better position against COVID-19 compared to other places. Vietnam, at the current time, mulls declaring an end of the current COVID-19 outbreak.


Assuntos
Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/prevenção & controle , Pandemias/prevenção & controle , Pneumonia Viral/epidemiologia , Pneumonia Viral/prevenção & controle , Betacoronavirus , Infecções Comunitárias Adquiridas/epidemiologia , Infecções Comunitárias Adquiridas/virologia , Humanos , Quarentena , Vietnã/epidemiologia
6.
Mar Pollut Bull ; 160: 111168, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33181914

RESUMO

Climate Change solutions include CO2 extraction from atmosphere and water with burial by living habitats in sediment/soil. Nowhere on the planet are blue carbon plants which carry out massive carbon extraction and permanent burial more intensely concentrated than in SE Asia. For the first time we make a national and total inventory of data to date for "blue carbon" buried from mangroves and seagrass and delineate the constraints. For an area across Southeast Asia of approximately 12,000,000 km2, supporting mangrove forests (5,116,032 ha) and seagrass meadows (6,744,529 ha), we analyzed the region's current blue carbon stocks. This estimate was achieved by integrating the sum of estuarine in situ carbon stock measurements with the extent of mangroves and seagrass across each nation, then summed for the region. We found that mangroves ecosystems regionally supported the greater amount of organic carbon (3095.19Tg Corg in 1st meter) over that of seagrass (1683.97 Tg Corg in 1st meter), with corresponding stock densities ranging from 15 to 2205 Mg ha-1 and 31.3 to 2450 Mg ha-1 respectively, a likely underestimate for entire carbon including sediment depths. The largest carbon stocks are found within Indonesia, followed by the Philippines, Papua New Guinea, Myanmar, Malaysia, Thailand, Tropical China, Viet-Nam, and Cambodia. Compared to the blue carbon hotspot of tropical/subtropical Gulf of Mexico's total carbon stock (480.48 Tg Corg), Southeast Asia's greater mangrove-seagrass stock density appears a more intense Blue Carbon hotspot (4778.66 Tg Corg). All regional Southeast Asian nation states should assist in superior preservation and habitat restoration plus similar measures in the USA & Mexico for the Gulf of Mexico, as apparently these form two of the largest tropical carbon sinks within coastal waters. We hypothesize it is SE Asia's regionally unique oceanic-geologic conditions, placed squarely within the tropics, which are largely responsible for this blue carbon hotspot, that is, consistently high ambient light levels and year-long warm temperatures, together with consistently strong inflow of dissolved carbon dioxide and upwelling of nutrients across the shallow geological plates.


Assuntos
Sequestro de Carbono , Ecossistema , Ásia Sudeste , China , Golfo do México , Indonésia , Malásia , Papua Nova Guiné , Filipinas , Tailândia , Vietnã , Áreas Alagadas
7.
Mar Pollut Bull ; 160: 111652, 2020 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-33181932

RESUMO

Estuaries of Southeast Asia are increasingly impacted by land-cover changes and pollution. Here, our research objectives were to (1) determine the origins of nutrient loads along the Can Gio estuary (Vietnam) and (2) identify the processes that affect the nutrient pools during the monsoon. We constructed four 24-h time-series along the salinity gradient measuring nutrient concentrations and stable isotopes values. In the upper estuary, urban effluents from Ho Chi Minh City were the main input of nutrients, leading to dissolved oxygen saturation <20%. In the lower estuary, ammonium and nitrite concentration peaks were explained by mangrove export. No contribution from aquaculture was detected, as it represents <0.01% of the total river discharge. Along the salinity gradient, nutrient inputs were rapidly consumed, potentially by phytoplankton while nitrate dual-stable isotopes indicated that nitrification occurred. Thus, even in a large and productive estuary, urban wastewater can affect nutrient dynamics with potentially important ecological risks.


Assuntos
Estuários , Águas Residuárias , Monitoramento Ambiental , Nutrientes , Rios , Estações do Ano , Vietnã
8.
BMC Infect Dis ; 20(1): 757, 2020 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-33059623

RESUMO

BACKGROUND: Individuals that work and sleep in remote forest and farm locations in the Greater Mekong Subregion continue to remain at high risk of both acquiring and transmitting malaria. These difficult-to-access population groups largely fall outside the reach of traditional village-centered interventions, presenting operational challenges for malaria programs. In Vietnam, over 60% of malaria cases are thought to be individuals who sleep in forests or on farms. New malaria elimination strategies are needed in countries where mobile and migrant workers frequently sleep outside of their homes. The aim of this study was to apply targeted surveillance-response based investigative approaches to gather location-specific data on confirmed malaria cases, with an objective to identify associated malaria prevention, treatment and risk behaviors of individuals sleeping in remote forest and farms sites in Vietnam. METHODS: A cross-sectional study using novel targeted reactive investigative approaches at remote area sleeping sites was conducted in three mountainous communes in Phu Yen province in 2016. Index cases were defined as individuals routinely sleeping in forests or farms who had tested positive for malaria. Index cases and non-infected neighbors from forest and farm huts within 500 m of the established sleeping locations of index cases were interviewed at their remote-area sleeping sites. RESULTS: A total of 307 participants, 110 index cases and 197 neighbors, were enrolled. Among 93 participants who slept in the forest, index cases were more likely to make > 5 trips to the forest per year (prevalence odds ratio (POR) 7.41, 95% confidence interval (CI) 2.66-20.63), sleep in huts without walls (POR 44.00, 95% CI 13.05-148.33), sleep without mosquito nets (POR 2.95, 95% CI 1.26-6.92), and work after dark (POR 5.48, 95% CI 1.84-16.35). Of the 204 farm-based respondents, a significantly higher proportion of index cases were involved in non-farming activities (logging) (POR 2.74, 95% CI 1.27-5.91). CONCLUSION: Investigative approaches employed in this study allowed for the effective recruitment and characterization of high-priority individuals frequently sleeping in remote forest and farm locations, providing relevant population and site-specific data that decision makers can use to design and implement targeted interventions to support malaria elimination.


Assuntos
Florestas , Malária/epidemiologia , Malária/transmissão , Adulto , Terapia Comportamental , Estudos Transversais , Fazendas , Feminino , Habitação , Humanos , Malária/tratamento farmacológico , Malária/prevenção & controle , Masculino , Pessoa de Meia-Idade , Mosquiteiros , Razão de Chances , Assunção de Riscos , Vietnã/epidemiologia , Vietnã/etnologia
9.
Environ Monit Assess ; 192(11): 731, 2020 Oct 28.
Artigo em Inglês | MEDLINE | ID: mdl-33118082

RESUMO

The selection of an appropriate sampling frequency is very important in monitoring coastal seawater quality. The present study sought to optimize the sampling frequency for coastal seawater quality monitoring. We combined mathematical models with natural and human activities by the analytic hierarchy process method. The study was designed to consider historical monitoring data, regulated seawater quality standard, tide, land use, and ship activities in optimizing coastal seawater sampling frequency in Ha Long Bay, Vietnam. The study results indicated that monitoring activities should focus in points having high human activities as well as high concentration of TSS, ammonium, and oil. Points S1-S8 should have high sampling frequency (16-30 samples/year), whereas points S23-S28 can have low sampling frequency (3-5 samples/year). In a year, monitoring activities should be focused in June, July, and August with the number of samples of 42, 54, and 44 pear year (weighting values 0.120, 0.161, and 0.112), respectively. It should consider the mathematical aspects associated with natural and human factors when calculating sampling frequency for coastal seawater quality monitoring. Proposed optimization method can be applied for other coastal regions.


Assuntos
Monitoramento Ambiental , Água do Mar , Humanos , Modelos Teóricos , Vietnã
10.
Artigo em Inglês | MEDLINE | ID: mdl-33008102

RESUMO

Assessing healthy diet literacy and eating behaviors is critical for identifying appropriate public health responses to the COVID-19 pandemic. We examined the psychometric properties of digital healthy diet literacy (DDL) and its association with eating behavior changes during the COVID-19 pandemic among nursing and medical students. We conducted a cross-sectional study from 7 April to 31 May 2020 at 10 public universities in Vietnam, in which 7616 undergraduate students aged 19-27 completed an online survey to assess socio-demographics, clinical parameters, health literacy (HL), DDL, and health-related behaviors. Four items of the DDL scale loaded on one component explained 71.32%, 67.12%, and 72.47% of the scale variances for the overall sample, nursing, and medical students, respectively. The DDL scale was found to have satisfactory item-scale convergent validity and criterion validity, high internal consistency reliability, and no floor or ceiling effect. Of all, 42.8% of students reported healthier eating behavior during the pandemic. A 10-index score increment of DDL was associated with 18%, 23%, and 17% increased likelihood of healthier eating behavior during the pandemic for the overall sample (OR, 1.18; 95%CI, 1.13, 1.24; p < 0.001), nursing students (OR, 1.23; 95%CI, 1.10, 1.35; p < 0.001), and medical students (OR, 1.17; 95%CI, 1.11, 1.24; p < 0.001), respectively. The DDL scale is a valid and reliable tool for the quick assessment of digital healthy diet literacy. Students with higher DDL scores had a higher likelihood of healthier eating behavior during the pandemic.


Assuntos
Infecções por Coronavirus , Dieta Saudável , Comportamento Alimentar , Pandemias , Pneumonia Viral , Estudantes de Medicina , Estudantes de Enfermagem , Adulto , Betacoronavirus , Estudos Transversais , Bacharelado em Enfermagem , Humanos , Reprodutibilidade dos Testes , Inquéritos e Questionários , Vietnã , Adulto Jovem
11.
J Glob Health ; 10(2): 020502, 2020 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-33110585

RESUMO

Background: The COVID-19 pandemic has hit all corners of the world, challenging governments to act promptly in controlling the spread of the pandemic. Due to limited resources and inferior technological capacities, developing countries including Vietnam have faced many challenges in combating the pandemic. Since the first cases were detected on 23 January 2020, Vietnam has undergone a 3-month fierce battle to control the outbreak with stringent measures from the government to mitigate the adverse impacts. In this study, we aim to give insights into the Vietnamese government's progress during the first three months of the outbreak. Additionally, we relatively compare Vietnam's response with that of other Southeast Asia countries to deliver a clear and comprehensive view on disease control strategies. Methods: The data on the number of COVID-19 confirmed and recovered cases in Vietnam was obtained from the Dashboard for COVID-19 statistics of the Ministry of Health (https://ncov.vncdc.gov.vn/). The review on Vietnam's country-level responses was conducted by searching for relevant government documents issued on the online database 'Vietnam Laws Repository' (https://thuvienphapluat.vn/en/index.aspx), with the grey literature on Google and relevant official websites. A stringency index of government policies and the countries' respective numbers of confirmed cases of nine Southeast Asian countries were adapted from the Oxford COVID-19 Government Response Tracker (https://www.bsg.ox.ac.uk/research/research-projects/coronavirus-government-response-tracker). All data was updated as of 24 April 2020. Results: Preliminary positive results have been achieved given that the nation confirmed no new community-transmitted cases since 16 April and zero COVID-19 - related deaths throughout the 3-month pandemic period. To date, the pandemic has been successfully controlled thanks to the Vietnamese government's prompt, proactive and decisive responses including mobilization of the health care systems, security forces, economic policies, along with a creative and effective communication campaign corresponding with crucial milestones of the epidemic's progression. Conclusions: Vietnam could be one of the role models in pandemic control for low-resource settings. As the pandemic is still ongoing in an unpredictable trajectory, disease control measures should continue to be put in place in the foreseeable short term.


Assuntos
Infecções por Coronavirus/epidemiologia , Transmissão de Doença Infecciosa/legislação & jurisprudência , Regulamentação Governamental , Política de Saúde/legislação & jurisprudência , Pandemias/legislação & jurisprudência , Pneumonia Viral/epidemiologia , Betacoronavirus , Infecções por Coronavirus/prevenção & controle , Transmissão de Doença Infecciosa/prevenção & controle , Alocação de Recursos para a Atenção à Saúde/legislação & jurisprudência , Alocação de Recursos para a Atenção à Saúde/métodos , Humanos , Pandemias/prevenção & controle , Pneumonia Viral/prevenção & controle , Vietnã/epidemiologia
13.
Zootaxa ; 4790(2): zootaxa.4790.2.5, 2020 Jun 11.
Artigo em Inglês | MEDLINE | ID: mdl-33055842

RESUMO

Four new earthworm species of the genus Amynthas Kinberg, 1867 are described from southeastern Vietnam, named A. longiprostaticus sp. nov., A. dorsomorrioides sp. nov., A. minhdam sp. nov., and A. ocularius sp. nov. A. longiprostaticus sp. nov. belongs to the A. minimus group of species, characterized by spermathecal pores in 5/6. It is distinguished by small body size with length 5-7 cm, and by elongate prostate glands, which extend over more than 10 segments. A. dorsomorrioides sp. nov. belongs to the A. morrisi group, characterized by holandry and spermathecal pores in 5/6/7. It is distinguished by a dorsal location of these pores, by one pair of large genital markings presetal in xvii, and by the absence of genital markings in the spermathecal region. A. minhdam sp. nov. also belongs to the A. morrisi group, and is distinguished by a pair of genital markings located medially in xviii and by the spermathecal diverticula, which have a small seminal chamber sub-divided by constrictions into 4 or 5 parts, in chain-form. A. ocularius sp. nov. belongs to the A. gracilis group by virtue of holandry and spermathecal pores in 5/6/7/8. It is distinguished by numerous small genital markings in the male region, postsetal in xviii and presetal in xix, and arranged in a peculiar fashion reminiscent of eyeglasses connected by a bridge. With these descriptions, there are now 119 species of Amynthas known in Vietnam.


Assuntos
Oligoquetos , Animais , Tamanho Corporal , Masculino , Vietnã
14.
Zootaxa ; 4808(3): zootaxa.4808.3.1, 2020 Jul 03.
Artigo em Inglês | MEDLINE | ID: mdl-33055960

RESUMO

The genus Otostigmus Porat, 1876 is reviewed based on recent material collected from parts of Vietnam. A total of nine species are documented and imaged. The phylogeny of the genus Otostigmus is analyzed based on a 603-bp dataset of the cytochrome c oxidase subunit I (COI) gene. The average K2P genetic distance between Otostigmus species is 19%, and eight of nine species are considered to be monophyletic, except O. amballae. The phylogenetic relationship between Otostigmus species necessitates a deeper study with more samples and genetic data. In addition, an identification key to all Otostigmus species is provided for the fauna of Vietnam.


Assuntos
Artrópodes , Animais , Filogenia , Vietnã
15.
Zootaxa ; 4789(1): zootaxa.4789.1.5, 2020 Jun 08.
Artigo em Inglês | MEDLINE | ID: mdl-33056447

RESUMO

We describe a new species of Cyrtodactylus on the basis of four specimens collected from Phu My, Binh Dinh Province, southern Vietnam. Cyrtodactylus phumyensis sp. nov. is distinguished from the remaining Indochinese bent-toed geckos by a combination of the following characters: size small (SVL up to 66.8 mm); two internasals; dorsal tubercle rows 18 or 19 at midbody; ventral scale rows 33-41; ventrolateral folds slightly developed; each thigh with 5-7 enlarged femoral scales; femoral pores absent in males and female; a series of 5-7 precloacal pores plus a pitted, enlarged precloacal scale in males; 6 pitted, enlarged precloacal scales in female; paravertebral tubercles 20-23; lamellae under toe IV 18-21; small subcaudal scales, not transversely enlarged; two irregular dark longitudinal stripes on shoulder. In phylogenetic analyses, the new species is recovered as a member of the Cyrtodactylus irregularis species group, and strongly supported as a sister taxon of C. cucdongensis from Khanh Hoa Province.


Assuntos
Lagartos , Estruturas Animais , Animais , Feminino , Masculino , Filogenia , Vietnã
16.
Zootaxa ; 4802(2): zootaxa.4802.2.8, 2020 Jun 23.
Artigo em Inglês | MEDLINE | ID: mdl-33056623

RESUMO

A new clearwing moth species, Toleria vietnamica sp. nov. from Ba Be National Park, Bac Kan Province, North Vietnam is described and illustrated. An annotated catalogue of Asian members of the tribe Cissuvorini is added to this paper. The catalogue contains the following information: the references to the original descriptions, information on name-bearing types, complete bibliographies of the presented taxa, distribution and available data on host plants. The type series of the new species is deposited in the collection of National Museum of Nature and Science, Tsukuba (formerly Natural Science Museum Tokyo).


Assuntos
Mariposas , Animais , Vietnã
17.
Zootaxa ; 4801(2): zootaxa.4801.2.2, 2020 Jun 18.
Artigo em Inglês | MEDLINE | ID: mdl-33056657

RESUMO

The subgenus Delineatia Volynkin Huang, 2019 of the genus Ammatho Walker, 1855 is reviewed. The subgenus is subdivided into the A. delineata and the A. sublucana species-groups. Two new species are described: Ammatho (Delineatia) tairadiata Wu Volynkin, sp. n. from Taiwan and Ammatho (Delineatia) trangchim Volynkin Wu, sp. n. from Central Vietnam. The synonymy of Hypocrita rhodina Herrich-Schäffer, 1855 with Ammatho (Delineatia) delineata (Walker, 1854) is revised. It is stated that the type locality of H. rhodina, Borneo is wrong and probably based on the incorrectly labeled type specimen. Adults and male and female genitalia of all species are illustrated.


Assuntos
Mariposas , Animais , Feminino , Masculino , Taiwan , Vietnã
18.
Zootaxa ; 4759(3): zootaxa.4759.3.7, 2020 Apr 03.
Artigo em Inglês | MEDLINE | ID: mdl-33056910

RESUMO

The bark louse genus Symbiopsocus includes 23 species, all of which known from East Asia. Here we report the first record of Symbiopsocus from Vietnam, with description of Symbiopsocus vietnamicus sp. nov. A revised key to the species of Symbiopsocus is provided.


Assuntos
Anoplura , Animais , Neópteros , Casca de Planta , Vietnã
19.
Zootaxa ; 4861(1): zootaxa.4861.1.9, 2020 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-33055874

RESUMO

Actus hagiangensis sp. nov. is described and illustrated from Vietnam. Females of the new species are characterized by medium body size (L = 1.1-1.4 mm), barrel shaped buccal cavity of medium size (26-31 x 13-15 µm) with dorsal tooth apex located 75-81% of buccal cavity length from base and two longitudinal subventral rows, each with four rasp-like denticles; reproductive system didelphic-amphidelphic, vagina short with distinct par refringens vaginae, sclerotized pieces globular in optical section; tail elongate-conoid, slightly ventrally arcuate, with three caudal glands and prominent spinneret. Male with spicules 46 µm in length, and slender, slightly curved gubernaculum, 12 µm long, without accessory piece. This is the first report of a male specimen of the genus Actus. The new species is close to A. salvadoricus but differs by the larger buccal cavity, more anterior position of the dorsal tooth apex and more rounded vaginal sclerotized pieces.


Assuntos
Helmintos , Nematoides , Animais , Tamanho Corporal , Feminino , Genitália , Masculino , Vietnã
20.
Zootaxa ; 4858(3): zootaxa.4858.3.8, 2020 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-33056224

RESUMO

The genus Euepedanus of the family Epedanidae is recorded from Vietnam for the first time. Euepedanus vietnamicus sp. nov. (males and females) is diagnosed, figured and described. The main characteristics that distinguish this species from other species Euepedanus are quite large body sizes, structure of the distal segment of the chelicerae, armament of palps and on the dorsal surface of body with a pattern resembling the Latin letter X. The only known locality of the new E. vietnamicus sp. nov. in southern Vietnam, is mapped.


Assuntos
Aracnídeos , Animais , Tamanho Corporal , Feminino , Masculino , Vietnã
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