Cobweb-spider
Guides
Steatoda hespera
Steatoda hespera is a species of cobweb spider in the family Theridiidae. It is native to North America and has been documented in the United States and Canada. As a member of the genus Steatoda, it belongs to a group commonly known as false widow spiders, though specific details about its biology and ecology remain limited in the available literature.
Steatoda palomara
Steatoda palomara is a species of cobweb spider in the family Theridiidae. It is known only from the United States, with records from North America. The species was described by Chamberlin & Ivie in 1935. Like other members of the genus Steatoda, it is presumed to construct irregular tangled webs typical of theridiid spiders.
Steatoda triangulosa
Triangulate Cobweb Spider, Triangulate Combfoot, Triangulate Bud Spider
Steatoda triangulosa is a small cobweb spider in the family Theridiidae, frequently encountered in human-made structures across North America and Europe. Adults measure 3.5–5.9 mm in body length, with females larger than males. The species is recognized by the distinctive triangular pattern on its abdomen. It is synanthropic, thriving in basements, garages, and cellars, and has been introduced to North America from the Palearctic region. The species is not considered dangerously venomous to humans.
Steatoda variata
Steatoda variata is a species of cobweb spider in the family Theridiidae, first described by Gertsch in 1960. It is found in the United States and Mexico. Two subspecies are recognized: Steatoda variata variata and Steatoda variata china. Very little is known about the specific biology or ecology of this species compared to better-studied congeners like Steatoda triangulosa or Steatoda nobilis.
Steatoda washona
Steatoda washona is a cobweb spider in the family Theridiidae, described by Gertsch in 1960. It belongs to a genus that includes several species commonly known as false widows due to their resemblance to black widows (Latrodectus). The species occurs in the southwestern United States and Mexico. Like other Steatoda species, it constructs irregular tangled webs and is typically found in sheltered microhabitats.
Stemmops bicolor
Stemmops bicolor is a small spider species in the family Theridiidae (cobweb spiders), first described by O. Pickard-Cambridge in 1894. The species is known from the Caribbean region and parts of Central and North America, with records from Cuba, Mexico, the Bahamas, and the southern United States through Panama. As a member of the genus Stemmops, it belongs to a group of theridiid spiders characterized by their compact body form and specialized web-building behavior.
Theridion albidum
White Long-legged Cobweaver
Theridion albidum is a species of cobweb spider in the family Theridiidae, first described by Banks in 1895. It is native to North America and has been documented in the United States and Canada. As a member of the genus Theridion, it belongs to a large and diverse group of comb-footed spiders that construct irregular, three-dimensional webs. The species is known by the common name "White Long-legged Cobweaver," though detailed natural history information remains limited in published sources.
Theridion californicum
Theridion californicum is a species of cobweb spider in the family Theridiidae. It has been documented in the United States and Canada. As a member of the Theridiidae, it constructs irregular, three-dimensional webs for prey capture.
Theridion cheimatos
Theridion cheimatos is a cobweb spider species in the family Theridiidae. It was described by Gertsch and Archer in 1942. The species is known from the United States, with records from North America. As a member of Theridiidae, it constructs irregular three-dimensional cobwebs and possesses comb-footed spines on the hind legs for manipulating silk.
Theridion differens
Different Cobweb Spider
Theridion differens is a species of cobweb spider in the family Theridiidae. It is found in the United States and Canada, with records from Alberta and British Columbia. The species was described by Emerton in 1882. As a member of the genus Theridion, it constructs the irregular, three-dimensional webs characteristic of this group.
Theridion dilutum
Theridion dilutum is a species of cobweb spider in the family Theridiidae, described by Herbert W. Levi in 1957. It belongs to one of the largest genera of spiders, with members characterized by their irregular, three-dimensional webs. The species occurs in North America, specifically in the United States and Mexico. Like other theridiids, it possesses comb-like serrated bristles on the hind tarsi used to manipulate silk.
Theridion flavonotatum
Theridion flavonotatum is a species of cobweb spider in the family Theridiidae. The species is documented from the United States, Cuba, and Turks & Caicos. Like other members of the genus, it constructs irregular three-dimensional webs. Published information on its biology and ecology remains sparse.
Theridion frondeum
Eastern Long-legged Cobweaver
Theridion frondeum is a species of cobweb spider in the family Theridiidae, commonly known as the Eastern Long-legged Cobweaver. It is found in North America, with records from the United States, Canada, and the Bahama Islands. Like other members of Theridiidae, it constructs irregular three-dimensional webs and possesses comb-like structures on its hind legs for silk handling. The species was first described by Nicholas Marcellus Hentz in 1850.
Theridion goodnightorum
Theridion goodnightorum is a species of cobweb spider in the family Theridiidae, described by arachnologist Herbert W. Levi in 1957. The species epithet honors the husband-and-wife arachnologists Clarence and Marie Goodnight. Like other members of the genus Theridion, this species constructs irregular, three-dimensional cobwebs and possesses the characteristic comb-like bristles (setae) on the hind tarsi used to manipulate silk. The species is documented from the southwestern United States and Mexico.
Theridion kawea
Theridion kawea is a species of cobweb spider described by Herbert W. Levi in 1957. It belongs to the family Theridiidae, a large group of spiders characterized by their irregular, three-dimensional webs and comb-like structures on their hind legs used for silk manipulation. The species has been documented in the southwestern United States and Mexico.
Theridion lawrencei
Theridion lawrencei is a species of cobweb spider in the family Theridiidae, described by Gertsch and Archer in 1942. It is a small theridiid spider found in the United States. Like other members of its family, it constructs irregular, three-dimensional tangled webs. The species is named in honor of someone (likely R.F. Lawrence, a notable arachnologist), though the specific etymology is not documented in available sources. Very little detailed biological information has been published about this species specifically.
Theridion melanurum
Theridion melanurum is a cobweb spider in the family Theridiidae, first described by Hahn in 1831. The species has a broad Palearctic distribution spanning Europe to Siberia, with additional populations in Macaronesia, North Africa, and the Middle East. It has been introduced to the United States, where established populations have been documented. As a member of Theridiidae, it constructs the irregular, three-dimensional webs characteristic of cobweb spiders.
Theridion michelbacheri
Theridion michelbacheri is a species of cobweb spider in the family Theridiidae, first described by Levi in 1957. It is known from the United States, with records indicating presence in North America. As a member of the genus Theridion, it shares the general characteristics of this large and diverse group of comb-footed spiders, though specific details about its biology remain poorly documented.
Theridion morulum
Theridion morulum is a species of cobweb spider in the family Theridiidae, first described by O. Pickard-Cambridge in 1898. It belongs to a large genus of small spiders known for their irregular, three-dimensional webs. The species is recorded from the southwestern United States and Mexico, but detailed biological information appears limited in available sources.
Theridion murarium
Fence Long-legged Cobweaver
Theridion murarium is a species of cobweb spider in the family Theridiidae, first described by Emerton in 1882. It is found in North America, with records from the United States, Canada (including Alberta), and Middle America. Like other Theridiidae, it constructs irregular, three-dimensional webs. The common name 'Fence Long-legged Cobweaver' suggests an association with fence-line habitats, though specific ecological details remain poorly documented.
Theridion neomexicanum
Theridion neomexicanum is a species of cobweb spider in the family Theridiidae. It is found in the United States and Canada. As a member of the Theridiidae, it constructs irregular, three-dimensional webs typical of the family. The species was described by Banks in 1901.
Theridion neshamini
Theridion neshamini is a species of cobweb spider in the family Theridiidae, described by Levi in 1957. The species is known from the United States, though specific details about its biology, habitat preferences, and ecology remain poorly documented. As a member of Theridiidae, it is presumed to construct irregular, three-dimensional cobwebs for prey capture.
Theridion pennsylvanicum
Theridion pennsylvanicum is a cobweb spider in the family Theridiidae, described by Emerton in 1913. It belongs to the infraorder Araneomorphae, the true spiders. The species is known from the United States and Canada. Like other members of Theridiidae, it constructs irregular, three-dimensional webs and possesses the comb-like spines on the hind legs characteristic of this family.
Theridion petraeum
Theridion petraeum is a cobweb spider in the family Theridiidae, described by L. Koch in 1872. The species has a broad distribution spanning North America, Europe, North Africa, the Caucasus, and Russia extending to the Far East and Kazakhstan. Records indicate presence across multiple continents including Africa and northern Asia. As a member of Theridiidae, it constructs irregular three-dimensional webs, though specific details of its biology and ecology remain poorly documented in available sources.
Theridion pictum
Painted Cobweb Weaver
Theridion pictum is a cobweb spider in the family Theridiidae and the type species of the genus Theridion. It has a Holarctic distribution spanning North America, Europe, and Asia, with introduced populations in South Africa. The species constructs three-dimensional webs in damp, low-lying areas, often on vegetation or man-made structures. Adults mature in early to mid-summer, with females persisting into autumn.
Theridion pierre
Theridion pierre is a species of cobweb spider in the family Theridiidae, described by Levi & Patrick in 2013. It is a member of the large genus Theridion, which contains numerous small spiders that construct irregular, three-dimensional webs. The species is known from the United States.
Theridion rabuni
Theridion rabuni is a species of cobweb spider in the family Theridiidae. It is known from the United States and the Bahama Islands. Little specific information is available about its biology, ecology, or behavior beyond its taxonomic placement and geographic distribution.
Theridion submissum
Theridion submissum is a species of cobweb spider in the family Theridiidae. The species was described by Gertsch and Davis in 1936. It is found in the United States, Mexico, the Bahama Islands, and Jamaica. Like other members of the genus Theridion, it constructs irregular three-dimensional webs.
Theridion transgressum
Theridion transgressum is a species of cobweb spider in the family Theridiidae, first described by Petrunkevitch in 1911. It belongs to the large genus Theridion, which contains numerous small-bodied spiders that construct irregular, three-dimensional webs. The species is recorded from the United States and Mexico. Very little specific biological information is available for this species.
Theridion varians
Variable Cobweb Spider
Theridion varians is a species of cobweb spider in the family Theridiidae. It has a broad native distribution spanning Europe, North Africa, Turkey, the Caucasus, Russia, Central Asia, and China. The species has been introduced to North America, where it is now established in Canada and the United States. Four subspecies are recognized, reflecting geographic variation across its range.
Theridula gonygaster
Ladybird Spider
Theridula gonygaster is a species of cobweb spider in the family Theridiidae. Commonly known as the Ladybird Spider, it has a broad native range across Central and South America and the Caribbean, and has been introduced to multiple regions including parts of Europe, Africa, and Asia. The species is notable for its widespread anthropogenic dispersal and distinctive appearance.
Thymoites camano
cobweb spider
Thymoites camano is a species of cobweb spider in the family Theridiidae, first described by Levi in 1957. It is known only from the United States. As a member of Theridiidae, it constructs irregular, three-dimensional webs to capture prey. The species remains poorly documented in scientific literature.
Thymoites maderae
Thymoites maderae is a species of cobweb spider in the family Theridiidae, first described by Gertsch and Archer in 1942. The species occurs from the United States through Panama. Very little is known about its biology or ecology. Available records suggest it inhabits Middle and North America, though specific habitat associations remain undocumented.
Thymoites minero
Thymoites minero is a species of cobweb spider in the family Theridiidae, first described by Vincent D. Roth in 1992. The species is known from the United States and is part of a genus of small theridiid spiders. Like other members of Theridiidae, it constructs irregular, three-dimensional webs rather than the flat orb webs characteristic of many other spider families. The genus Thymoites contains numerous species, many of which are poorly known and difficult to distinguish without close examination.
Wamba crispulus
Wamba crispulus is a species of cobweb spider in the family Theridiidae, originally described as Theridion crispulum by Eugène Simon in 1895. The species has an exceptionally broad distribution spanning the Americas from Canada to Brazil and throughout the Caribbean. It belongs to the genus Wamba, which contains relatively few described species.
Yunohamella lyrica
Lyric Cobweaver
Yunohamella lyrica is a cobweb spider in the family Theridiidae, commonly known as the Lyric Cobweaver. The species has a broad geographic distribution spanning North America and East Asia, including Korea and Japan. It belongs to a genus of small spiders that construct irregular, tangled webs.