49,517 results match your criteria arachnids


Revision of the spider family Zodariidae (Arachnida, Araneae) in Iran and Turkmenistan, with seventeen new species.

Zookeys 2021 27;1035:145-193. Epub 2021 Apr 27.

Institute for Biological Problems of the North RAS, Portovaya Str.18, Magadan, Russia Institute for Biological Problems of the North Magadan Russia.

Species of the spider family Zodariidae occurring in Iran and Turkmenistan are reviewed. Seventeen species of three subfamilies are described as new to science: (♂, Qom; northern Iran), (♂, Alborz; northern Iran) (Lachesaninae), (♂♀, Kermanshah and Lorestan; western Iran), (♂♀, Fars; southwestern Iran) (Storeninae), (♂, Tehran; northern Iran), (♂♀, Qazvin and Tehran; northern Iran), (♂, Ilam and Lorestan; western Iran), (♂♀, Fars; southern Iran), (♂♀, Tehran; northern Iran), (♂, Kurdistan; western Iran), (♂, Kermanshah; western Iran), (♂♀, Fars, Isfahan and Markazi; central Iran), (♂, Mary; southeastern Turkmenistan), (♂, Isfahan; central Iran), (♂♀, Ardabil and Qazvin; northern and northwestern Iran), (♂, East Azerbaijan and Kurdistan; northwestern and western Iran) and (♀, Khuzestan; southwestern Iran) (Zodariinae). Andreeva & Tyshchenko, 1968, currently comprising only the type species ( Andreeva & Tyshchenko, 1968) is rediagnosed, with the following species being (re)transferred to it: (Tyshchenko, 1970) , (Kroneberg, 1875) , (Nenilin, 1985) , (Zhu & Zhu, 1983) , (Andreeva & Tyshchenko, 1968) , (Zhu, 1988) , Marusik & Koponen, 2001 , (Nenilin & Fet, 1985) , (Eskov, 1996) , Andreeva & Tyshchenko, 1968 , Marusik & Koponen, 2001 , (Nenilin & Fet, 1985) and Ponomarev, 2007 (all ex. Read More

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Evolutionary pattern of karyotypes and meiosis in pholcid spiders (Araneae: Pholcidae): implications for reconstructing chromosome evolution of araneomorph spiders.

BMC Ecol Evol 2021 May 3;21(1):75. Epub 2021 May 3.

Arachnida Section, Alexander Koenig Zoological Research Museum, Adenauerallee 160, 53113, Bonn, Germany.

Background: Despite progress in genomic analysis of spiders, their chromosome evolution is not satisfactorily understood. Most information on spider chromosomes concerns the most diversified clade, entelegyne araneomorphs. Other clades are far less studied. Read More

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Visual Diagnosis of the Varroa Destructor Parasitic Mite in Honeybees Using Object Detector Techniques.

Sensors (Basel) 2021 Apr 14;21(8). Epub 2021 Apr 14.

Department of Control and Instrumentation, Brno University of Technology, 61 600 Brno, Czech Republic.

The mite is one of the most dangerous Honey Bee () parasites worldwide and the bee colonies have to be regularly monitored in order to control its spread. In this paper we present an object detector based method for health state monitoring of bee colonies. This method has the potential for online measurement and processing. Read More

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Standardised inventories of spiders (Arachnida, Araneae) on touristic trails of the native forests of the Azores (Portugal).

Biodivers Data J 2021 16;9:e62886. Epub 2021 Apr 16.

IUCN SSC Mid-Atlantic Islands Specialist Group, Angra do Heroísmo, Portugal IUCN SSC Mid-Atlantic Islands Specialist Group Angra do Heroísmo Portugal.

Background: The sharp increase in tourist visitation of the Azores Archipelago from 2015 onwards raised concerns about the impacts of recreational tourism on native habitats. In response, a project was financed by the Azorean Government to investigate the drivers of biodiversity erosion associated with recreational tourism. Here, we present the data on spider biodiversity found on trails located within the native Azorean forests as they are home to several endemic species of great conservation value. Read More

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Fine structure of the epicuticular secretion coat and associated glands of Pedipalpi and Palpigradi (Arachnida).

J Morphol 2021 Apr 27. Epub 2021 Apr 27.

Department of Biological Sciences, Macquarie University, Sydney, New South Wales, Australia.

Pedipalpi Latreille, 1810 is a poorly studied clade of arachnids comprising the whip spiders (Amblypygi Thorell, 1883), short-tailed whip scorpions (Schizomida Petrunkevitch, 1945) and whip scorpions (Thelyphonida Cambridge, 1872). It has recently been shown that whip spiders coat their exoskeleton with a solid cement layer (cerotegument) that forms elaborate microstructures and turns the cuticle into a super-hydrophobic state. The amblypygid cerotegument provides taxonomic information due to its fine structural diversity, but its presence and variation in the sister groups was previously unknown. Read More

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The Family Borreliaceae (Spirochaetales), a Diverse Group in Two Genera of Tick-Borne Spirochetes of Mammals, Birds, and Reptiles.

J Med Entomol 2021 Apr 27. Epub 2021 Apr 27.

Department of Biochemistry and Biomedical Sciences, McMaster University, Hamilton, Ontario, Canada.

Spirochetes of the family Borreliaceae are, with one exception, tick-borne pathogens of a variety of vertebrates. The family at present comprises two genera: Borrelia (Swellengrebel), which includes the agents of relapsing fever, avian spirochetosis, and bovine borreliosis, and Borreliella (Gupta et al.), which includes the agents of Lyme disease and was formerly known as 'Borrelia burgdorferi sensulato complex'. Read More

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Two new species of the genus emNemaspela/em Šilhavý from caves in Georgia (Opiliones: Nemastomatidae).

Zootaxa 2021 Apr 7;4951(3):zootaxa.4951.3.7. Epub 2021 Apr 7.

Johannes Gutenberg-Universität, Institut für Organismische und Molekulare Evolutionsbiologie (iomE), D-55099 Mainz, Germany; Senckenberg Research Institute, Arachnology, D-60325 Frankfurt am Main, Germany.

Two highly specialized endemic troglobiotic harvestman species of the genus Nemaspela Šilhavý, 1966 are described. N. melouri sp. Read More

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Production, composition, and mode of action of the painful defensive venom produced by a limacodid caterpillar, .

Proc Natl Acad Sci U S A 2021 May;118(18)

Institute for Molecular Bioscience, The University of Queensland, St Lucia, QLD, 4072, Australia;

Venoms have evolved independently several times in Lepidoptera. Limacodidae is a family with worldwide distribution, many of which are venomous in the larval stage, but the composition and mode of action of their venom is unknown. Here, we use imaging technologies, transcriptomics, proteomics, and functional assays to provide a holistic picture of the venom system of a limacodid caterpillar, Contrary to dogma that defensive venoms are simple in composition, produces a complex venom containing 151 proteinaceous toxins spanning 59 families, most of which are peptides <10 kDa. Read More

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A new Andean genus, , with descriptions of four new species and two new Neotropical species of (Noctuidae, Pantheinae).

Zookeys 2021 6;1028:113-134. Epub 2021 Apr 6.

Florida Museum of Natural History, McGuire Center for Lepidoptera and Biodiversity, University of Florida, Gainesville, 32611, FL, USA.

Martinez, is proposed as a new Neotropical genus of Pantheinae, forming a sister group to Dognin, 1891 based on a phylogenetic analysis. In addition, one new combination and four new species are proposed: (Walker, 1865), (Colombia), Martinez, (Ecuador), Martinez, (Colombia), Martinez, (Ecuador), and Martinez, (Ecuador). Two new Neotropical species of are described, Martinez, and Martinez, Read More

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Analysis of effectivity of the tickborne encephalitis virus detection methods in ixodid ticks.

Klin Lab Diagn 2021 Apr;66(4):237-241

Scientific-Research Institute of epidemiology and microbiology named after G.P. Somov.

Tick-borne encephalitis (TBE) is transmissible viral disease widely common in temperate zone of Eurasia. ELISA and PCR are used for express identification of the vector's infection, but the results of the two methods often do not agree. Aim of the work is comparative analysis for TBE virus of Ixodid ticks from nature using complex of methods, including ELISA, PCR, and isolation of the virus in laboratory mice. Read More

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Cases of Q fever detected in residents of the novosibirsk region hospitalized with suspection of infections transmitted by ticks.

Klin Lab Diagn 2021 Apr;66(4):229-236

Institute of Chemical Biology and Fundamental Medicine SB RAS.

Coxiella burnetii is the causative agent of Q fever (coxiellosis), which, in addition to acute manifestations, often occurs in a latent form, is prone to chronic course and, in the absence of antibiotic therapy, has a high risk of disability or death. As a result of the presence of a wide range of clinical manifestations specific to other infectious diseases, the use of laboratory test methods (LTM) is required to make a diagnosis. The presence of Q fever anthropurgic foci in the Novosibirsk region was described in the 90s of the last century, but due attention to its laboratory diagnostics is not paid in this region. Read More

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Juvenile hormone in spiders. Is this the solution to a mystery?

Gen Comp Endocrinol 2021 Apr 20;308:113781. Epub 2021 Apr 20.

University of Silesia in Katowice, Faculty of Natural Sciences, Institute of Biology, Biotechnology and Environmental Protection, Bankowa 9, 40007 Katowice, Poland.

The juvenile hormone (JH) plays a crucial role in arthropod physiological processes, e.g., the regulation of metamorphosis, development, and reproduction (the vitellogenesis, the development of gonads, egg production). Read More

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Can morphological and behavioral traits predict the foraging and feeding dynamics of social arachnids?

Curr Zool 2021 Apr 6;67(2):183-190. Epub 2020 Oct 6.

Laboratório de Ecologia Comportamental e de Interações, Instituto de Biologia, Universidade Federal de Uberlândia, Uberlândia, MG, 38402-020, Brazil.

Complex social insect species exhibit task specialization mediated by morphological and behavioral traits. However, evidence of such traits is scarce for other social arthropods. We investigated whether the social pseudoscorpion exhibits morphologically and behaviorally specialized individuals in prey capture. Read More

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Description of the larval and adult hindgut tract of the common spider crab Maja brachydactyla Balss, 1922 (Brachyura, Decapoda, Malacostraca).

Cell Tissue Res 2021 Apr 9. Epub 2021 Apr 9.

, Barcelona, Spain.

Arthropods are the most diversified animals on Earth. The morphology of the digestive system has been widely studied in insects; however, crustaceans have received comparatively little attention. This study describes the hindgut tract of the common spider crab Maja brachydactyla Balss, 1922, in larvae and adults using dissection, light and electron microscopical analyses. Read More

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Serological evidence of Rickettsia in horses from a semi-arid Brazilian region.

Rev Bras Parasitol Vet 2021 2;30(1):e026220. Epub 2021 Apr 2.

Laboratório de Doenças Parasitárias, Universidade Federal do Vale do São Francisco - UNIVASF, Petrolina, PE, Brasil.

Brazilian spotted fever (BSF) is a common tick-borne disease caused by Rickettsia rickettsii. Horses are the primary hosts of the main vector, Amblyomma sculptum, and are considered efficient sentinels for circulation of Rickettsia. Therefore, the aim of this study was to detect antibodies reactive to R. Read More

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Species Composition and Spatial Distribution of Scorpions Based on Eco-Environmental Variables in Provinces Along with the Oman Sea and the Persian Gulf in Iran: A GIS-Based Approach.

Arch Razi Inst 2021 Mar 1;76(1):149-160. Epub 2021 Mar 1.

Department of Medical Entomology and Vector Control, Health Science Research Center, Faculty of Health, Mazandaran University of Medical Sciences, Sari, Iran.

Scorpions are venomous arachnids with major medical health importance in Iran, specifically in the Southwest. In total, three families of scorpions, including Scorpionidae, Hemiscorpiidae, and Buthidae were reported in Iran. This study was conducted on scorpion ecology to determine the species composition and the dispersion of scorpions based on the ecological and environmental variables in combination with the Geographic Information System (GIS) in Khuzestan, Hormozgan, and Bushehr Provinces along with the Oman Sea and the Persian Gulf in Iran. Read More

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Inhibition of Chitin Synthase 1 Leading to Increased Mortality in Arthropods.

Environ Toxicol Chem 2021 Apr 5. Epub 2021 Apr 5.

Norwegian Institute for Water Research (NIVA), Section of Ecotoxicology and Risk Assessment, Gaustadalléen 21, N-0349, Oslo, Norway.

Arthropods (including insects, crustaceans and arachnids) rely on the synthesis of chitin to complete their life cycles (Merzendorfer, 2011). This article is protected by copyright. All rights reserved. Read More

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Distinct phylogeographic patterns in populations of two oribatid mite species from the genus Pantelozetes (Acari, Oribatida, Thyrisomidae) in Central Europe.

Exp Appl Acarol 2021 Apr 3;83(4):493-511. Epub 2021 Apr 3.

Biology Centre, Institute of Soil Biology, Czech Academy of Sciences, České Budějovice, Czech Republic.

Oribatid mites are important decomposers of dead organic matter in soils across the world. Their origin dates back at least 380 Mya. Multiple severe climatic changes during Late Pliocene and Pleistocene shaped the migration patterns of these organisms and should be reflected in the genetic variability of their current populations. Read More

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BIOLOGICAL METHOD FOR BABESIOSIS DETECTION: THE UNIFIED VERSION IN VIVO.

Authors:
Inna I Torianyk

Wiad Lek 2021 ;74(2):268-272

STATE INSTITUTION «MECHNIKOV INSTITUTE OF MICROBIOLOGY AND IMMUNOLOGY OF THE NATIONAL ACADEMY OF MEDICAL SCIENCES OF UKRAINE», KHARKIV, UKRAINE.

Objective: The aim is to establish a unified version of the biological method for babesiosis detection in vivo.

Patients And Methods: Materials and methods: samples (n=257) of biological material of different origin were examined. These included: blood samples from patients (n=6) and cattle (n=15); salivary gland homogenates (n=28) from 147 imagoes of ticks of the family Ixodidae, 32 imagoes of Ixodes ricinus and 115 imagoes of Dermacentor reticulates; spleen homogenates (n=63) from mouse-like rodents (Muridae) of the genera Myodes, Microtus, Apodemus and Sylvaemus. Read More

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MACROMICROSCOPIC ARGUMENTATION OF THE PATHOGENETIC SCENARIO OF BABESIOSIS IN THE COORDINATE SYSTEM «PATHOGEN-CARRIER-RESERVOIR».

Authors:
Inna I Torianyk

Wiad Lek 2021 ;74(3 cz 1):436-440

STATE INSTITUTION «MECHNIKOV INSTITUTE OF MICROBIOLOGY AND IMMUNOLOGY OF THE NATIONAL ACADEMY OF MEDICAL SCIENCES OF UKRAINE», KHARKIV, UKRAINE.

Objective: The aim is to get a thorough argument for the babesiosis pathogenetic scenario in the coordinate system «pathogen (Babesia spp.) - carrier (ticks of the Ixodoidea superfamily of the Ixodidea family) - reservoir (a susceptible organism)» with the emphasis on the epizootic/epidemic role of the carrier.

Patients And Methods: Materials and methods: The macromicroscopic method of research was used in order to maximize the clarification of the babesiosis scenario, its pathogenetic links, the connection of the latter with attacks of active stages of ixodes ticks, types of circulation of ontogenetic forms of Babesia spp. Read More

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Efficacy of a novel topical combination of esafoxolaner, eprinomectin and praziquantel against ear mite (Otodectes cynotis) infestations in cats.

Parasite 2021 2;28:26. Epub 2021 Apr 2.

Boehringer-Ingelheim Vetmedica GmbH, Kathrinenhof Research Center, Walchenseestr. 8-12, 83101 Rohrdorf, Germany.

Esafoxolaner, a purified enantiomer of afoxolaner with insecticidal and acaricidal properties, is combined with eprinomectin and praziquantel, nematodicidal and cestodicidal compounds, in NexGard Combo, a novel topical endectoparasiticide formulation for cats. The efficacy of this formulation was assessed against Otodectes cynotis in two laboratory studies conducted in South Africa and in the USA with local isolates, and in one field trial conducted in Europe. In each study, cats were randomly allocated to a placebo-treated control group and a novel formulation-treated group. Read More

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Efficacy of a novel topical combination of esafoxolaner, eprinomectin and praziquantel against Amblyomma americanum in cats.

Parasite 2021 2;28:25. Epub 2021 Apr 2.

Boehringer-Ingelheim Animal Health, 29 avenue Tony Garnier, 69007 Lyon, France.

Esafoxolaner, a purified enantiomer of afoxolaner with insecticidal and acaricidal properties, is combined with eprinomectin and praziquantel in NexGard Combo, a novel topical endectoparasiticide product for cats. The efficacy of this novel formulation was assessed in two experimental studies against induced infestations with Amblyomma americanum, a tick species of major importance, highly prevalent in a large southeastern quarter of the United States. In each study, 10 cats were randomly allocated to a placebo control group and 10 cats to a novel formulation treated group. Read More

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Efficacy of a novel topical combination of esafoxolaner, eprinomectin and praziquantel against Rhipicephalus sanguineus in cats.

Parasite 2021 2;28:24. Epub 2021 Apr 2.

Clinvet International (Pty) Ltd., P.O. Box 11186, Universitas, Bloemfontein 9321, Republic of South Africa.

Esafoxolaner is a purified enantiomer of afoxolaner with insecticidal and acaricidal properties. It is combined with eprinomectin and praziquantel in a novel topical endectoparasiticide formulation for cats. The efficacy of this novel formulation was assessed in an experimental study against induced infestation of Rhipicephalus sanguineus ticks. Read More

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Efficacy of a novel topical combination of esafoxolaner, eprinomectin and praziquantel against Ixodes ricinus and Ixodes scapularis in cats.

Parasite 2021 2;28:23. Epub 2021 Apr 2.

Boehringer-Ingelheim Animal Health, 29 Avenue Tony Garnier, 69007 Lyon, France.

Esafoxolaner is a purified enantiomer of afoxolaner with insecticidal and acaricidal properties. It is combined with eprinomectin and praziquantel in a novel topical endectoparasiticide formulation for cats. The efficacy of this novel formulation was evaluated in three Ixodes ricinus and two Ixodes scapularis experimental studies, with comparable designs. Read More

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Are Orienteers Protected Enough against Tick Bites? Estimating Human Exposure to Tick Bites through a Participative Science Survey during an Orienteering Competition.

Int J Environ Res Public Health 2021 03 18;18(6). Epub 2021 Mar 18.

US 1371 Laboratory of Excellence ARBRE, INRAE, Centre INRAE Grand Est-Nancy, F-54280 Champenoux, France.

Mass-participation events in temperate forests are now well-established features of outdoor activities and represent high-risk activities regarding human exposition to tick bites. In this study we used a citizen science approach to quantify the space-time frequency of tick bites and undetected tick bites among orienteers that participated in a 6-day orienteering competition that took place in July 2018 in the forests of Eastern France, and we looked at the use and efficacy of different preventive behaviors. Our study confirms that orienteers are a high-risk population for tick bites, with 62. Read More

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The Ultimate List of the Most Frightening and Disgusting Animals: Negative Emotions Elicited by Animals in Central European Respondents.

Animals (Basel) 2021 Mar 9;11(3). Epub 2021 Mar 9.

National Institute of Mental Health, Topolová 748, 250 67 Klecany, Czech Republic.

Animals have always played an important role in our everyday life. They are given more attention than inanimate objects, which have been adaptive during the evolution of mankind, with some animal species still presenting a real threat to us. In this study, we focused on the species usually evaluated as the scariest and most disgusting in the animal kingdom. Read More

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Transcriptional Responses of Resistant and Susceptible Wheat Exposed to Wheat Curl Mite.

Int J Mol Sci 2021 Mar 8;22(5). Epub 2021 Mar 8.

Department of Entomology, Texas A&M AgriLife Research, Amarillo, TX 79106, USA.

(1) Background: The wheat curl mite ( Keifer) is a key pest of wheat ( L.) worldwide. While a number of wheat cultivars resistant to the mites have been employed to minimize the impact on the yield and quality of grain, little is known regarding the mechanisms underlying host plant resistance. Read More

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InsectChange: a global database of temporal changes in insect and arachnid assemblages.

Ecology 2021 Apr 2:e03354. Epub 2021 Apr 2.

German Centre for Integrated Biodiversity Research Halle-Jena-Leipzig (iDiv), Puschstrasse 4, 04103, Leipzig, Germany.

Insects are the most ubiquitous and diverse group of eukaryotic organisms on Earth, forming a crucial link in terrestrial and freshwater food webs, but have recently made headlines because of observations of dramatic declines in some places. Although there are hundreds of long-term insect monitoring programs, a global database for long-term data on insect assemblages has so far remained unavailable. In order to facilitate synthetic analyses of insect abundance changes, we compiled a database of long-term (≥10 year) studies of assemblages of insects (many also including arachnids) in the terrestrial and freshwater realms. Read More

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The maturity index for Uropodina (Acari: Mesostigmata) communities as an indicator of human-caused disturbance in selected forest complexes of Poland.

Exp Appl Acarol 2021 Apr 2;83(4):475-491. Epub 2021 Apr 2.

Department of General Zoology, Faculty of Biology AMU in Poznań, ul. Uniwersytetu Poznańskiego 6, 61-614, Poznań, Poland.

The necessity of monitoring changes occurring in soil compels us to look for new methods that will allow easy and precise evaluation of the soil quality in a given area. One proposed method is the maturity index (MI) - an index that is based on the distribution of species along the r-to-K continuum in examined populations. In this study, mites from the suborder Uropodina (Acari: Mesostigmata) were examined for their appropriateness in MI-based assessments of soil quality. Read More

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Tip of the iceberg: species diversity of spiders (Araneae, Pholcidae) in the Changbai Mountains, Northeast China.

Zool Res 2021 May;42(3):267-271

Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China.

Despite 250 years of taxonomic classification and over 1.2 million species already catalogued, known species diversity is only a small part of true species diversity on Earth, and thus, the known species are only the tip of iceberg. Here, we investigated the genus Walckenaer, 1805 of the family Pholcidae C. Read More

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