Theridiidae
Latrodectus bishopi Kaston, 1938
Latrodectus bishopi Kaston, 1938
Latrodectus bishopi, the red widow, is a venomous spider endemic to Florida's sand-pine scrub habitat.
Latrodectus katipo Powell, 1871
Latrodectus katipo Powell, 1871
Latrodectus katipo (katipō) is a New Zealand endemic widow spider with two colour variants tied to temperature that lives in coastal sand dunes.
Latrodectus curacaviensis (Müller, 1776)
Latrodectus curacaviensis (Müller, 1776)
Latrodectus curacaviensis is a nocturnal black widow species found in the Lesser Antilles and South America.
Latrodectus mirabilis (Holmberg, 1876)
Latrodectus mirabilis (Holmberg, 1876)
Latrodectus mirabilis is a spider that has a red rectangle, rather than an hourglass, on its ventral side.
Latrodectus corallinus Abalos, 1980
Latrodectus corallinus Abalos, 1980
Latrodectus corallinus is a red-marked black widow spider species native to Argentina, common in agricultural areas.
Latrodectus renivulvatus Dahl, 1902
Latrodectus renivulvatus Dahl, 1902
Latrodectus renivulvatus is a venomous black widow spider species found across Africa and parts of the Middle East.
Steatoda grossa (C.L.Koch, 1838)
Steatoda grossa (C.L.Koch, 1838)
Steatoda grossa is a cosmopolitan spider that shares some traits with black widows, and reportedly preys on them.
Steatoda triangulosa (Walckenaer, 1802)
Steatoda triangulosa (Walckenaer, 1802)
Steatoda triangulosa, the triangulate cobweb spider, is a small cosmopolitan theridiid spider often found in buildings.
Steatoda borealis (Hentz, 1850)
Steatoda borealis (Hentz, 1850)
Steatoda borealis is a cobweb spider species from the Theridiidae family found in the United States and Canada.
Steatoda bipunctata (Linnaeus, 1758)
Steatoda bipunctata (Linnaeus, 1758)
Steatoda bipunctata, the rabbit hutch spider, is a common small false widow spider with a holarctic distribution that poses very little risk to humans.
Steatoda albomaculata (De Geer, 1778)
Steatoda albomaculata (De Geer, 1778)
Steatoda albomaculata, the white-spotted false widow, is a cobweb spider found across multiple regions of the Northern Hemisphere.
Steatoda capensis Hann, 1990
Steatoda capensis Hann, 1990
Steatoda capensis is a small spider native to South Africa that may threaten the endemic New Zealand katipō spider.
Steatoda paykulliana (Walckenaer, 1806)
Steatoda paykulliana (Walckenaer, 1806)
Steatoda paykulliana, the false widow spider resembling true black widows, is widespread across Europe, Asia, and the Middle East, with mild human venom effects.
Steatoda cingulata (Thorell, 1890)
Steatoda cingulata (Thorell, 1890)
Steatoda cingulata is a small, distinctively colored Asian cobweb spider with sexual size dimorphism.
Steatoda nobilis (Thorell, 1875)
Steatoda nobilis (Thorell, 1875)
Steatoda nobilis is a widespread highly invasive spider native to Macaronesia, identifiable by its brown bulbous abdomen and skull-like cream markings.
Steatoda lepida (O.Pickard-Cambridge, 1880)
Steatoda lepida (O.Pickard-Cambridge, 1880)
Steatoda lepida is an endemic Theridiidae species widespread throughout New Zealand including the Chatham Islands.
Crustulina guttata (Wider, 1834)
Crustulina guttata (Wider, 1834)
Crustulina guttata is a Palearctic spider species and the type species of the genus Crustulina, notably found in Lithuania.
Asagena americana Emerton, 1882
Asagena americana Emerton, 1882
Asagena americana, the twospotted cobweb spider, is a Theridiidae cobweb spider found in the US, Canada, and China.
Asagena phalerata (Panzer, 1801)
Asagena phalerata (Panzer, 1801)
Asagena phalerata is a cobweb spider species found across Europe, Eurasia to Korea in sparsely vegetated habitats.
Enoplognatha ovata (Clerck, 1757)
Enoplognatha ovata (Clerck, 1757)
Enoplognatha ovata is a highly variable small spider native to Europe and introduced to North America.
Anelosimus studiosus (Hentz, 1850)
Anelosimus studiosus (Hentz, 1850)
Anelosimus studiosus is a socially polymorphic North and South American subsocial comb-footed spider.
Anelosimus eximius (Keyserling, 1884)
Anelosimus eximius (Keyserling, 1884)
Anelosimus eximius is a social spider from the Americas that forms large cooperative colonies with distinct reproduction and dispersal patterns.
Kochiura aulica (C.L.Koch, 1838)
Kochiura aulica (C.L.Koch, 1838)
Kochiura aulica is a Theridiidae spider species distributed from the Canary Islands and Cape Verde to Azerbaijan.
Episinus angulatus (Blackwall, 1836)
Episinus angulatus (Blackwall, 1836)
Episinus angulatus is an uncommon small brownish tangle-web spider found from Europe to Russia.
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