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| Latrodectus mactans | |
|---|---|
| Name | Latrodectus mactans |
| Regnum | Animalia |
| Phylum | Arthropoda |
| Classis | Arachnida |
| Ordo | Araneae |
| Familia | Theridiidae |
| Genus | Latrodectus |
| Species | mactans |
Latrodectus mactans is a species of spider in the family Theridiidae commonly known as the southern black widow. The species has been noted in historical collections and taxonomic treatments associated with institutions such as the Smithsonian Institution, Harvard University, Field Museum of Natural History, and museums in New York City. Specimens and descriptions appear in works by naturalists and institutions linked to Linnaeus, Carl Jakob Sundevall, John V. Riley, and collections at British Museum and Natural History Museum, London.
The scientific name was established within the Linnaean framework and has appeared in catalogues connected to Carl Linnaeus, Pierre André Latreille, Charles Darwin, Alfred Russel Wallace, and later arachnologists at institutions including Royal Society, Academy of Natural Sciences of Philadelphia, and Zoological Society of London. Taxonomic revisions involving the genus Latrodectus have been discussed in monographs associated with American Museum of Natural History, California Academy of Sciences, Smithsonian Institution publications, and treatises linked to researchers at Harvard University and University of Cambridge. Nomenclatural history intersects with specimen exchanges among collectors in Boston, Philadelphia, New York City, and correspondence preserved in archives at the British Museum and Library of Congress.
Adults are characterized by a glossy black abdomen and a red dorsal hourglass or paired spots reported in field guides published by National Geographic Society, Encyclopaedia Britannica, and regional keys used by United States Department of Agriculture extension services. Morphological descriptions appear in plates and illustrations circulated through Royal Society transactions and museum catalogues from Natural History Museum, London and Smithsonian Institution. Diagnostic characters for identification are used by arachnologists at University of California, Berkeley, University of Texas, and Yale University comparative collections. Sexual dimorphism—females larger than males—is documented in faunal surveys conducted by researchers affiliated with Cornell University, Ohio State University, and University of Florida.
Latrodectus mactans has been recorded across regions of the United States with distributional data compiled by agencies such as United States Geological Survey, Centers for Disease Control and Prevention, Florida Museum of Natural History, and state natural history museums in Georgia (U.S. state), Texas, California, and Arizona. Occurrence records have been incorporated into databases maintained by Smithsonian Institution and regional checklists produced by Texas A&M University and University of Kansas. Habitats include anthropogenic structures and vegetated sites noted in reports from National Park Service units, Yosemite National Park, Great Smoky Mountains National Park, and urban surveys in Chicago, Los Angeles, and Miami.
Web-building behavior is described in ecological studies housed at University of Michigan, Duke University, and Princeton University, and appears in comparative analyses published in journals affiliated with Royal Society. Predatory interactions with insects and other arthropods have been documented in field studies linked to Smithsonian Tropical Research Institute, Scripps Institution of Oceanography surveys, and agricultural extension reports from Iowa State University and University of Nebraska–Lincoln. Predator–prey dynamics and parasitoid interactions are referenced in entomological collections at Natural History Museum, London and experimental work from University of California, Davis. Seasonal activity patterns are reported in regional bulletins from Texas A&M University and University of Florida research programs.
Clinical reports and toxinology studies involving this species are catalogued by institutions such as the Centers for Disease Control and Prevention, World Health Organization, American Association of Poison Control Centers, and medical research at Johns Hopkins University School of Medicine, Mayo Clinic, and Cleveland Clinic. Biochemical analyses of neurotoxic components are conducted in laboratories associated with National Institutes of Health, Harvard Medical School, and Massachusetts Institute of Technology. Case reports historically appear in literature archived at New England Journal of Medicine and clinical reviews circulated through Lancet and other medical journals originating from hospitals like Massachusetts General Hospital and Mount Sinai Hospital.
Reproductive behavior, mating plugs, and sexual cannibalism have been subjects of study in evolutionary biology groups at University of Oxford, University of Cambridge, University of Edinburgh, and research centers such as Max Planck Institute for Behavioral Physiology and laboratories at University of Toronto. Egg sac production, juvenile development, and dispersal patterns are documented in longitudinal studies associated with Smithsonian Institution collections and university extension programs at Iowa State University and University of Florida. Larval and instar stages appear in illustrated keys produced by museum departments at American Museum of Natural History and university entomology collections in Madison, Wisconsin.
Human–spider encounters inform public health guidance from agencies like the Centers for Disease Control and Prevention, regional Departments of Health, and extension services at University of California Cooperative Extension and Cooperative Extension Service. Management recommendations, exclusion techniques, and educational outreach are provided by organizations such as National Pest Management Association, Integrated Pest Management programs operating through USDA, and municipal vector-control units in cities including Atlanta, Houston, Philadelphia, and New York City. Cultural references and depictions in media have appeared via institutions like Smithsonian Institution, museums in Washington, D.C., and natural history programming produced by BBC and National Geographic Society.
Category:Theridiidae