Results 21 to 30 of about 252 (123)

Bite envenomation by Latrodectus geometricus (Araneae: Theridiidae) spiders in Malaysia

Tropical Biomedicine, 2021
We report two confirmed human bite cases by Lactrodectus geometricus , also known as the brown widow spider. These are the first reported bite envenomation incidents by L. geometricus in Malaysia. The incidents occurred in Tawau, Sabah and Paka, Terengganu. Both men were bitten on their ear while putting on motorcycle helmets.
A S, Mokhtar, M, Muslimin, A Y, Mat-Saat, A-R M, Ghazali, A K, Ismail, N M, Abdul-Aziz   +5 more
openaire   +2 more sources

First Record of Pediobius pyrgo Walker (Hymenoptera: Eulophidae) in South America and its Emergence from Egg Sacs of Latrodectus geometricus C. L. Koch (Araneae: Theridiidae)

EntomoBrasilis, 2015
We record the first time the occurrence of Pediobius pyrgo (Walker) (Hymenoptera: Eulophidae) for South America. This is also the first report of P. pyrgo emerging from egg sacs of Latrodectus geometricus C. L. Koch (Araneae: Theridiidae).
Karine Schoeninger, Diego Pádua, Lidianne Salvatierra, Marcio Oliveira   +3 more
doaj   +3 more sources

Advances in the reconstruction of the spider tree of life: A roadmap for spider systematics and comparative studies

Cladistics, Volume 39, Issue 6, Page 479-532, December 2023., 2023
Abstract In the last decade and a half, advances in genetic sequencing technologies have revolutionized systematics, transforming the field from studying morphological characters or a few genetic markers, to genomic datasets in the phylogenomic era. A plethora of molecular phylogenetic studies on many taxonomic groups have come about, converging on, or
Siddharth Kulkarni, Hannah M. Wood, Gustavo Hormiga   +2 more
wiley   +1 more source

Urban Environments Aid Invasion of Brown Widows (Theridiidae: Latrodectus geometricus) in North America, Constraining Regions of Overlap and Mitigating Potential Impact on Native Widows

Frontiers in Ecology and Evolution, 2021
Urbanization is a major cause of biotic homogenization and habitat fragmentation for native communities. However, the role of urbanization on the success of biological invasions on a continental scale has yet to be explored.
Melissa Sadir, Katharine A. Marske
doaj   +1 more source

Chromosome mapping of dragline silk genes in the genomes of widow spiders (Araneae, Theridiidae). [PDF]

PLoS ONE, 2010
With its incredible strength and toughness, spider dragline silk is widely lauded for its impressive material properties. Dragline silk is composed of two structural proteins, MaSp1 and MaSp2, which are encoded by members of the spidroin gene family ...
Yonghui Zhao, Nadia A Ayoub, Cheryl Y Hayashi   +2 more
doaj   +1 more source

Predation on a pygmy shrew, Sorex minutus, by the noble false widow spider, Steatoda nobilis

Ecosphere, Volume 14, Issue 2, February 2023., 2023
Abstract The noble false widow spider Steatoda nobilis is a globally invasive species with implications for public health and possibly for native ecosystems. Here, we report on a case of predation on a protected species of vertebrate, a pygmy shrew Sorex minutus in Britain. The importance and novelty of this report are: (1) this is the third documented
Michel M. Dugon, Colin Lawton, Dawn Sturgess, John P. Dunbar   +3 more
wiley   +1 more source

Invasive brown widow spiders disperse aerially under a broad range of environmental conditions

Ethology, Volume 128, Issue 8, Page 564-571, August 2022., 2022
We tested dispersal by spiderlings of the invasive brown widow (Latrodectus geometricus) under field conditions in the Negev Desert of Israel. Invasive brown widow spiderlings ballooned more during the day than at night and under a wide range of environmental conditions.
Monica A. Mowery, Yael Lubin, Michal Segoli   +2 more
wiley   +1 more source

Spider Parental Care and Awe‐Inspiring Egg Sac (Cocoon)

International Journal of Zoology, Volume 2022, Issue 1, 2022., 2022
Spiders (Arachnida, Araneae) represent one of the largest groups of organisms on Earth with more than 45,000 recorded species found in nearly all terrestrial communities. In these communities, spiders are obligate predators and generalist consumers regulating the density of pests.
Akamu Jude Ewunkem, Kyle Agee, Marco Cucco   +2 more
wiley   +1 more source

Latrodectus geometricus Koch in Southern Florida

Science, 1936
During collecting episodes in urban southern California, brown widow spiders, Latrodectus geometricus C. L. Koch, 1841, were observed to reside most often in specific locations such as acute angles within patio furniture or on the underside of railings. In this laboratory study, we tested several variables to determine which factors brown widow females
Vetter, Richard S., Penas, Linda M, Hoddle, Mark S   +2 more
  +7 more sources

BIOLOGICAL ASPECTS OF THE TRUE SPIDER Latrodectus geometricus KOCH 1841(ARANEAE: THERIDIIDAE) FEEDING ON DIFFERENT PREY UNDER LABORATORY CONDITIONS [PDF]

Journal of Plant Protection and Pathology, 2015
This study was conducted to rear the spider Latrodectus geometricus Koch, 1841 (Theridiidae) when fed on different prey under laboratory conditions. The biological aspects including, 1-mating, 2-oviposition, 3-development, 4-adult longevity 5-lifecycle ...
M. Mohafez
doaj   +1 more source