scholarly journals First record of Xiphinema hunaniense Wang & Wu, 1992 (Dorylaimida: Longidoridae) associated with tea (Camellia sinensis (L.) Kuntze) in Thanh Hoa, Vietnam

2021 ◽  
Vol 43 (1) ◽  
Author(s):  
Le Thi Mai Linh ◽  
Nguyen Huu Tien ◽  
Nguyen Thi Duyen ◽  
Trinh Quang Phap

The dagger nematodes, Xiphinema spp., are migratory root-ectoparasitic nematodes that cause damage to a wide range of wild and cultivated plants over the world. In Vietnam, this nematode group has been studied mainly based on morphological characterizations. During a survey of pathogens associated with tea, a plant with many medicinal and therapeutic potentials, a population of Xiphinema hunaniense was recorded. This study provides the first morphological and molecular characterizations of Xiphinema hunaniense found on Tea in Vietnam. The 28S rDNA, and 18S rDNA phylogenetic trees of the genus Xiphinema are also provided. 18S rDNA sequence of X. hunaniense is also submitted to GenBank for the first time. 

2017 ◽  
Vol 57 (37) ◽  
pp. 473
Author(s):  
José Matias Rusconi ◽  
Maria Fernanda Achinelly ◽  
Nora Beatriz Camino

Thelastomatidae is one of the largest families parasitizing insects, within the order Oxyurida. In this work we reported parasitism in nymphs and adults of Neocurtilla claraziana by two different thelastomatid species as a part of a field survey on agricultural pests. Nymphs and adults of this insect were isolated from grasslands of Buenos Aires State, Argentina using a tensio-active solution. The nematode species Gryllophila skrjabini Sergiev, 1923 and Cephalobellus magalhaesi Schwenk, 1926 are briefly described and measurements are given. Both nematodes are reported for the first time in Argentina with C. magalhaesi being the second isolation of this species in the world. Neocurtilla clarziana is a new host record for G. skrjabini.


Zootaxa ◽  
2012 ◽  
Vol 3368 (1) ◽  
pp. 91 ◽  
Author(s):  
TOMISLAV KARANOVIC ◽  
JOO-LAE CHO

Ameiridae Monard, 1927 was previously known from Korea only after one endemic and four cosmopolitan species of the genus Nitokra Boeck, 1865, and a single widely distributed species of the genus Ameira Boeck, 1865, all from brackish enviroments. After a survey of 22 sampling sites and close to 3,500 harpacticoid specimens from various marine enviroments, we report on two new endemic species of Ameira, A. zahaae sp. nov. and A. kimchi sp. nov., from the West Sea and the South Sea respectively. They are both relatively closely related to the previously recorded cosmopolitan A. parvula (Claus, 1866), but show many novel morphological structures in the caudal rami shape and ornamentation. The identity of the cosmopolitan A. parvula in Korea is questioned, and an alternative hypothesis of a species-complex proposed. The fine ornamentation of body somites (especially the pores/sensilla pattern) is studied in detail, and proves to be a very useful new morphological tool in distinguishing closely related spacies in this genus. The genus Pseudameira Sars, 1911 is reported for the first time in Korea, after four females of P. mago sp. nov. from the South Sea. A single damaged female of Proameira cf. simplex (Norman & Scott, 1905) represents the first record of the genus Proameira Lang, 1944 in Korea, Asia, and anywhere in the Pacific. A key to Korean ameirids is also provided, and their apparent rarity in this part of the world noticed.


Molecules ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 997
Author(s):  
Nicolas Vogt ◽  
Vasily Sivchik ◽  
Aaron Sandleben ◽  
Gerald Hörner ◽  
Axel Klein

The organonickel complexes [Ni(Phbpy)X] (X = Br, OAc, CN) were obtained for the first time in a direct base-assisted arene C(sp2)–H cyclometalation reaction from the rather unreactive precursor materials NiX2 and HPhbpy (6-phenyl-2,2′-bipyridine) or from the versatile precursor [Ni(HPhbpy)Br2]2. Different from previously necessary C‒Br oxidative addition at Ni(0), an extended scan of reaction conditions allowed quantitative access to the title compound from Ni(II) on synthetically useful timescales through base-assisted C‒H activation in nonpolar media at elevated temperature. Optimisation of the reaction conditions (various bases, solvents, methods) identified 1:2 mixtures of acetate and carbonate as unrivalled synergetic base pairs in the optimum protocol that holds promise as a readily usable and easily tuneable access to a wide range of direct nickelation products. While for the base-assisted C‒H metalation of the noble metals Ru, Ir, Rh, or Pd, this acetate/carbonate method has been established for a few years, our study represents the leap into the world of the base metals of the 3d series.


Check List ◽  
2010 ◽  
Vol 6 (4) ◽  
pp. 657
Author(s):  
Carolina Cerqueira de Paiva ◽  
Maurizélia De Brito Silva ◽  
Tito Monteiro da Cruz Lotufo

Moringua edwardsi is recorded for the first time at Atol das Rocas, northeastern Brazil. Previous records of the species were located in the western Atlantic Ocean, from Florida to southeastern Brazil, but with many gaps between these regions. A single specimen was collected in Atol das Rocas in July 2007 and it is deposited in the Dias da Rocha Ichthyological Collection. The new record of M. edwardsi fills a geographic distribution gap of this species and complements the inventory of fish species inhabiting one of the most unique marine protected areas in the world.


CORD ◽  
2000 ◽  
Vol 16 (01) ◽  
pp. 34
Author(s):  
E.P. Pacumbaba ◽  
J.C. Orense ◽  
M.B. Zipagan ◽  
M.L.R. Imperial

Sangicoccus sp. nr. truncatispinus (Reyne) (Eriococcidae: Homoptera) is recorded for the first time as a major pest of coconut palms in the Philippines. It is   also the first record among the coconut growing areas in the world. It sucks the plant sap resulting to chlorosis of leaves. Furthermore, honeydew droplets exuded by the pest accumulated on upper leaf surfaces become substrate for sootymolds.   The severe infestation observed in late 1980’s already spread to 6 out of 8 municipalities of the southern second district of Palawan. Presently, crop losses are estimated to reach 53% of the nut yield. The prevailing easterly and westerly wind directions of 1-5 m/sec coupled with the dense manner of planting enabled first instar nymphs (crawlers) to spread to other palms. The long dry spell also favored the proliferation of Sangicoccus sp.bv.   Controlling the spread and outbreak of this pest seems to be difficult as it thrives on eleven alternate hosts. Ant attendance contributed to dispersal and protection from natural enemies. Moreover, field population of ten predatory species remained minimal. Possible strategies for its control are presented.


2021 ◽  
Vol 13 (3) ◽  
pp. 1048-1051
Author(s):  
Anwar M.J. Al-Maliky ◽  
Khaled Kh. Al-Khafaji ◽  
Tariq H. Al-Maliky

The present study identifies one species of the genus Octopus in the order: Octopoda (Cephalopoda: Mollusca), recorded forthe first time in the Iraqi coastal waters and Arabian-Persian Gulf. The study extended from January 2019 to December of thesame year. The Octopus specimens were seasonally obtained from the fishing trawlers operating in the Iraqi coastal waters inthe South of Al- Fao District, Basrah- Iraq, NW Arabian Gulf. The Octopus was identified as O. vulgaris in Iraqi coastal watersdepending on morphological features. The habitats of living specimens are briefly described. Some observations were reported on the occurrence of this species and the measurement of some environmental factors. The species was identified up to spe-cies level using standard literature. This species looks similar morphologically to the species which is already identified from the other areas around the world. The present study records significant expansion in the distribution range of this species.


2021 ◽  
Vol 9 (12) ◽  
pp. 2609
Author(s):  
Atia Basheer ◽  
Imran Zahoor

The present study aims to investigate the genomic variability and epidemiology of SARS-CoV-2 in Pakistan along with its role in the spread and severity of infection during the three waves of COVID-19. A total of 453 genomic sequences of Pakistani SARS-CoV-2 were retrieved from GISAID and subjected to MAFFT-based alignment and QC check which resulted in removal of 53 samples. The remaining 400 samples were subjected to Pangolin-based genomic lineage identification. And to infer our SARS-CoV-2 time-scaled and divergence phylogenetic trees, 3804 selected global reference sequences plus 400 Pakistani samples were used for the Nextstrain analysis with Wuhan/Hu-1/2019, as reference genome. Finally, maximum likelihood based phylogenetic tree was built by using the Nextstrain and coverage map was created by employing Nextclade. By using the amino acid substitutions, the maximum likelihood phylogenetic trees were developed for each wave, separately. Our results reveal the circulation of 29 lineages, belonging to following seven clades G, GH, GR, GRY, L, O, and S in the three waves. From first wave, 16 genomic lineages of SARS-CoV-2 were identified with B.1(24.7%), B.1.36(18.8%), and B.1.471(18.8%) as the most prevalent lineages respectively. The second wave data showed 18 lineages, 10 of which were overlapping with the first wave suggesting that those variants could not be contained during the first wave. In this wave, a new lineage, AE.4, was reported from Pakistan for the very first time in the world. However, B.1.36 (17.8%), B.1.36.31 (11.9%), B.1.1.7 (8.5%), and B.1.1.1 (5.9%) were the major lineages in second wave. Third wave data showed the presence of nine lineages with Alpha/B.1.1.7 (72.7%), Beta/B.1.351 (12.99%), and Delta/B.1.617.2 (10.39%) as the most predominant variants. It is suggested that these VOCs should be contained at the earliest in order to prevent any devastating outbreak of SARS-CoV-2 in the country.


2021 ◽  
Author(s):  
Boris Ksenofontov

In this monograph, for the first time in the world literature, the multi-stage and generalized flotation models proposed by the author more than thirty years ago are considered in a broad aspect. The possibilities of their use in various areas of flotation water purification, precipitation thickening and mineral processing are shown. Issues related to new flotation equipment in the form of flotation combines of the KBS type and special purpose, developed on the basis of multi-stage and generalized models of the flotation process, are widely covered. The prospects and ways of intensification of flotation processes of water purification are indicated. For a wide range of readers, including researchers, university teachers, postgraduates, masters, bachelors and undergraduates.


2019 ◽  
Vol 17 (2) ◽  
pp. 36-40
Author(s):  
K.V. Martynova ◽  
A.V. Martynov

Embolemidae is a small family of chrysidoid wasps (Hymenoptera: Chrysidoidea) understudied in Ukraine. The cosmopolitan genus Embolemus is shown comprising only 32 extant and 2 fossil species in the world fauna: the actual check-list for the genus is given. Only two species had been previously registered in Ukraine. Embolemus ruddii was recorded at Western Ukraine and Crimea, and E. tauricus was described from Crimea based on a single specimen collected at 1910. In present contribution E. tauricus is recorded for continental Ukraine for the first time from the Zaporizhia Region. The specimen collected almost fully correspond to the original description of the species, differing only in the small features of coloration. The habitat of E. tauricus is briefly described.


2015 ◽  
Vol 8 ◽  
Author(s):  
Hameed Abbas Hameed ◽  
Maria Saburova

Even though very few biological data on dinoflagellates from Iraqi aquatic ecosystems are available to date, there are none on the genusScrippsiella. For this reason, the survey was conducted along four sites in the Shatt Al-Arab River between November 2009 and July 2010. A dense population ofScrippsiella-like dinoflagellate was observed in the studied samples during November and December 2009. Less dense population of the same taxon was encountered in the downstream sites in July 2010. Based on observations of thecal plate pattern in epifluorescence microscopy, the species was attributed toScrippsiella trochoidea. The occurrence ofS. trochoideais reported for the first time in Iraqi waters from a wide range of temperature (17.9°C–35.2°C) and salinity (2.3–16.7).


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