platform spider
Microlinyphia is a genus of dwarf spiders in the family Linyphiidae, first described by U. Gerhardt in 1928. The genus includes thirteen species and one subspecies as of October 2025. Members are commonly known as "platform spiders" due to their distinctive sheet-web architecture. Males possess a notable circular filament called an embolus on the pedipalp, a key diagnostic feature.
Dana Sheet-web Micro-weaver
Microlinyphia dana is a small sheetweb spider in the family Linyphiidae, commonly known as the Dana Sheet-web Micro-weaver. It constructs flat, horizontal sheet webs typically positioned close to the ground or vegetation. The species is documented from the United States and Canada, though detailed natural history information remains limited.
Microlinyphia mandibulata mandibulata is a subspecies of sheet-web weaving spider in the family Linyphiidae. Members of this genus are commonly known as "platform spiders" for their flat, sheet-like webs built close to the ground. Males are distinguished by a circular filament called the embolus that extends from the pedipalp. This subspecies has been documented from the United States.
Microlinyphia mandibulata punctata is a subspecies of sheet-web weaving spider in the family Linyphiidae. It was described by Chamberlin and Ivie in 1943. The genus Microlinyphia is known for the distinctive embolus structure in males—a circular filament that serves as the sperm delivery channel. Members of this genus construct flat, sheet-like webs close to the ground in grassy habitats.
Platform spider
Microlinyphia pusilla is a small sheet-web spider in the family Linyphiidae, characterized by strong sexual dimorphism and a distinctive hammock-shaped web built close to the ground in vegetation. Males actively wander in search of mates during autumn, while females and immature males remain on their webs. The species has a Holarctic distribution across North America and Eurasia.
Microneta is a genus of dwarf spiders (family Linyphiidae) established by Anton Menge in 1869. The genus contains eleven described species distributed across North America, Europe, South America, and parts of Asia. One species, Microneta viaria, has an exceptionally broad distribution spanning multiple continents. Most species have more restricted ranges, with several endemic to specific regions such as Sweden, Peru, or Mexico.
whitebanded crab spider
Misumenoides is a genus of crab spiders in the family Thomisidae, established by F. O. Pickard-Cambridge in 1900. The genus contains approximately 35 species distributed primarily in the Americas, with M. formosipes (whitebanded crab spider) being the most thoroughly documented species in North America. These spiders are ambush predators that typically hunt on flowers, using their crab-like front legs to grasp prey. The genus has been recently recorded from Bangladesh, extending its known distribution to South Asia.
Modysticus modestus is a species of crab spider in the family Thomisidae. The species was described by Scheffer in 1904 and is known to occur in the United States. As a member of the crab spider family, it likely exhibits the characteristic crab-like posture with legs extended laterally, though specific morphological details for this species are not well documented in available sources.
Murricia uva is a species of hersiliid spider described by Foord in 2008. It belongs to the family Hersiliidae, commonly known as tree trunk spiders, recognized for their elongated spinnerets and cryptic bark-dwelling habits. The species is documented from Central Africa, with confirmed records spanning Cameroon to Uganda. Like other hersiliids, it likely exhibits the family's characteristic morphology and behavior, though species-specific details remain limited.
Myrmecotypus lineatus is a species of true spider in the family Corinnidae, subfamily Castianeirinae. It is the only species in the genus Myrmecotypus with a documented occurrence in the United States, making its distribution atypical compared to congeners which are otherwise restricted to the Neotropical region (Mexico to Panamá). The species was described by Emerton in 1909. Very few observations of this spider exist in public databases.
dwarf spiders
Mythoplastoides is a genus of dwarf spiders in the family Linyphiidae, first described by C. R. Crosby and S. C. Bishop in 1933. The genus contains two species, both restricted to the United States: M. erectus and M. exiguus (the type species). As members of Linyphiidae, these spiders are small-bodied and build sheet webs. The genus is poorly documented in scientific literature, with minimal ecological or behavioral data available.
Mythoplastoides exiguus is a dwarf spider species in the family Linyphiidae, first described by Nathan Banks in 1892. It is known from the United States. As a member of the sheet-web weaving spiders, it belongs to one of the most species-rich spider families globally, though specific information about this particular species remains limited.
Naphrys acerba is a jumping spider species in the family Salticidae, distributed across the United States and Mexico. It was first described by the Peckhams in 1909 and represents one of the more southerly distributed members of the genus Naphrys. The species has been documented with precise locality records in northeastern Mexican states including Nuevo León and Tamaulipas, extending the known range of the genus beyond the Nearctic region.
flea jumping spider
Naphrys pulex is a small jumping spider (Salticidae) native to eastern North America. Males measure approximately 4 mm in body length, while females are larger at 4.6–6.1 mm. The species exhibits cryptic coloration with a yellowish bar-shaped mark on the abdomen and spotted, ringed legs. First described by Nicholas Marcellus Hentz in 1846, it was transferred to the genus Naphrys in 1981. The species is primarily known for its ant-specialist diet.
Neoanagraphis is a genus of spiders in the family Liocranidae, first described by Gertsch and Mulaik in 1936. The genus is small, containing only two recognized species: N. chamberlini and N. pearcei. Both species were described by the original authors and remain the only members of the genus as of 2016. The genus belongs to a family of ground-dwelling spiders characterized by their elongated body form and particular eye arrangement.
Neoanagraphis chamberlini is a species of liocranid sac spider in the family Liocranidae. It was described by Gertsch & Mulaik in 1936. The species is found in the United States and Mexico. It belongs to a genus of spiders that was revised by Vetter in 2001, with this species being one of the taxa included in that revision. Very little is known about the biology or ecology of this particular species.
Thick-hooked Comb-tailed Spider
Neoantistea magna is a species of true spider in the family Hahniidae, a group commonly known as the sheet-web weaving spiders. It is found in the United States and Canada, with records from Alberta, British Columbia, and Manitoba. The species belongs to the marronoid clade, a genetically defined group of spiders that includes diverse ecologies and behaviors. The common name "Thick-hooked Comb-tailed Spider" refers to characteristic structures on the posterior abdomen.
Neocryphoeca is a genus of small North American araneomorph spiders in the family Cybaeidae, established by V. D. Roth in 1970. It contains only two described species, both endemic to the United States: N. beattyi and N. gertschi. The genus was originally classified with funnel weavers (Agelenidae) but was reassigned to Cybaeidae in 1983 based on morphological evidence. Cybaeidae spiders are generally associated with moist microhabitats and build simple sheet webs or silk retreats.
Neopisinus cognatus is a species of cobweb spider (family Theridiidae) described by O. Pickard-Cambridge in 1893. It belongs to a genus of small theridiid spiders found in the Americas. The species has been documented across a broad geographic range spanning from the southern United States through Central America to South America, including the Caribbean region.
Brown Sailor Spider
Neoscona nautica, commonly known as the brown sailor spider, is an orb-weaving spider in the family Araneidae. Native to Asia and Pacific islands, it has been introduced to both the Americas and Africa. As a member of the genus Neoscona, it constructs spiral orb webs to capture flying insect prey.
Western Spotted Orbweaver, Zig-zag Spider
Neoscona oaxacensis is a large orb-weaving spider distributed across the Americas from the United States to South America, including the Galápagos Islands. Females reach 9–18 mm in body length, males 6–13 mm. The species exhibits highly variable dorsal abdominal patterning, with a distinctive black-and-white pattern that aids identification. It constructs spiral orb webs to capture flying insects and is active primarily from late spring through autumn. The species was first described from Oaxaca, Mexico in 1863.
Marsh Orbweaver
Neoscona pratensis is an orb-weaver spider in the family Araneidae, commonly known as the Marsh Orbweaver. It is found in the United States and Canada, with records from Alberta and Manitoba in Canada. Like other members of the genus Neoscona, it constructs spiral orb webs to capture flying insect prey. The species was described by Nicholas Marcellus Hentz in 1847.
Neozimiris pubescens is a species of spider in the family Prodidomidae, first described by Nathan Banks in 1898. It belongs to a family of ground-dwelling spiders known for their cylindrical abdomen and active hunting behavior. The species has been recorded from Mexico and the United States, with distribution spanning parts of Middle America and North America.
Latticed Sheet-web Weaver
Neriene clathrata is a sheetweb spider in the family Linyphiidae, commonly known as the Latticed Sheet-web Weaver. The species has an exceptionally wide geographic distribution spanning the Holarctic region, occurring across North America, Europe, North Africa, the Caucasus, Russia (from European to Far East), China, Korea, and Japan. Despite its broad range, detailed biological information remains limited. As a member of the Linyphiidae, it constructs sheet webs rather than orb webs.
Neriene digna is a sheetweb spider in the family Linyphiidae, a large group commonly known as money spiders or sheetweb weavers. The species was originally described as Linyphia digna by Keyserling in 1886. It is recorded from the United States and Canada, though specific details about its biology and ecology remain poorly documented in the scientific literature. Like other members of the genus Neriene, it constructs flat sheet webs with a dome-shaped retreat.
Filmy Dome Spider
Neriene radiata, commonly known as the filmy dome spider, is a sheet-weaving spider in the family Linyphiidae with a Holarctic distribution spanning North America, Europe, and Asia. It constructs a distinctive dome-shaped web of fine silk, hanging upside-down beneath it to capture prey. The species is notable for its delicate web architecture and has been frequently observed in natural history studies.
Neriene variabilis is a species of sheetweb spider in the family Linyphiidae, first described by Nathan Banks in 1892. It is known from the United States. As a member of the Linyphiidae, it constructs sheet webs—flat or dome-shaped silk structures used for prey capture. The genus Neriene includes multiple species distributed across North America and Eurasia.
Nigma is a genus of cribellate araneomorph spiders in the family Dictynidae, established by Pekka T. Lehtinen in 1967. The genus contains approximately fourteen species distributed across Eurasia, North America, and Northern Africa. Members are generally small, with N. walckenaeri being among the largest in the family at up to 5 mm body length. The genus is part of the marronoid spider group, which has been subject to recent phylogenetic revision using genetic data from museum specimens.
Nodocion rufithoracicus is a ground spider in the family Gnaphosidae, described by Worley in 1928. The specific epithet 'rufithoracicus' refers to the reddish coloration of the cephalothorax. It belongs to a genus of relatively small, inconspicuous spiders that inhabit leaf litter and soil surfaces. Very few observations of this species have been documented, with only one record in iNaturalist as of the knowledge cutoff.
Nodocion voluntarius is a species of ground spider in the family Gnaphosidae, first described by Chamberlin in 1919. It belongs to a genus of small to medium-sized wandering spiders that actively hunt rather than build webs to capture prey. The species is documented from North America, though detailed ecological and behavioral studies remain limited. Like other gnaphosids, it likely occupies ground-level habitats and exhibits nocturnal activity patterns.
Novalena is a genus of funnel weavers (family Agelenidae) comprising 53 described species distributed across North America, Mexico, Central America, and the Caribbean. The genus was established by Chamberlin and Ivie in 1942. A significant taxonomic revision in 2017 by Maya-Morales and Jiménez added numerous Mexican species, and ongoing research continues to describe new species from montane forest habitats.
Novalena intermedia is a funnel-web spider in the family Agelenidae, described by Chamberlin & Gertsch in 1930. This species belongs to a genus of spiders known for constructing flat sheet webs with a funnel-shaped retreat at one end. It occurs in North America, with records from the United States and Canada.
Nycteola is a genus of spiders in the family Nucteniidae. These spiders are nocturnal orb-weavers that construct webs under eaves and near artificial light sources. They are typically found in association with human structures and buildings.
Ocrepeira ectypa is a species of orb-weaving spider in the family Araneidae. It is known from the United States, with 66 documented observations on iNaturalist. The species was first described by Walckenaer in 1841.
Ocrepeira georgia is an orb-weaving spider in the family Araneidae, described by Levi in 1976. It is one of approximately 50 species in the genus Ocrepeira, which is characterized by distinctive abdominal projections and complex stabilimentum patterns in their webs. The species is known from the United States, though specific details about its biology and ecology remain poorly documented.
Octonoba sinensis is a cribellate orb-weaving spider in the family Uloboridae. Native to East Asia, it has been introduced to the United States. As a member of Uloboridae, it lacks venom glands and instead uses a cribellum—a specialized silk-producing organ—to create sticky capture threads.
wall spider
Oecobius cellariorum is a small spider in the family Oecobiidae, commonly known as wall spiders. The species is native to the Mediterranean region and has been introduced to North America and East Asia. It is frequently found in human-built structures.
Oecobius maculatus is a small spider in the family Oecobiidae, commonly known as wall spiders or disc web spiders. Native to the Mediterranean region extending to Azerbaijan, it has been introduced to the United States and Mexico. The species is characterized by its flattened body form and association with human structures.
wall spider, baseboard spider, stucco spider
A small cribellate spider, 2–2.5 mm in body length, native to Europe and Northern Africa but introduced globally. Builds flat, circular webs with lateral openings on artificial structures. Uses an unusual hunting method: running around prey to entangle it in sticky silk ribbons from the anal tubule and spinnerets before biting.
Tricorn Dwarf Weaver
Oedothorax trilobatus is a species of dwarf spider in the family Linyphiidae, subfamily Erigoninae. It is a tiny spider, measuring approximately 2 mm in total body length. The species is notable for the distinctive cephalic swellings present in mature males, which give the species its name. It has been recorded from the United States, Canada, and Russia.
Goblin spider
Opopaea deserticola is a species of goblin spider in the family Oonopidae, first described by Eugène Simon in 1892. Originally described from Southeast Asia, this species has demonstrated remarkable dispersal capabilities and is now recognized as having one of the widest distributions among oonopid spiders. It has been introduced to numerous regions worldwide including the Americas, Pacific islands, Atlantic islands, and Japan. The species is part of a diverse radiation of minute spiders that inhabit leaf litter and soil microhabitats, where their small size and cryptic coloration make them exceptionally difficult to detect.
goblin spiders
Orchestina is a species-rich genus of tiny goblin spiders (family Oonopidae) containing over 180 extant species. Members measure 1.0–3.0 mm in body length and possess an enlarged fourth femur enabling jumping. The genus exhibits a nearly global distribution in the Northern Hemisphere south of 45°N, with highest diversity in Central and South America, Africa, and Asia. First described by Eugène Simon in 1882.
Orchestina quasimodo is a species of goblin spider (family Oonopidae) described from the United States in 2017. The species epithet references Quasimodo, the hunchbacked bell-ringer of Notre-Dame, presumably alluding to some morphological feature of the species. Oonopidae are among the most diverse spider families, characterized by their small size and reduced eye complements. Most members of the genus Orchestina are found in leaf litter and soil habitats.
A genus of dwarf spiders (family Linyphiidae) established in 1894, comprising approximately 30 species distributed across cold-temperate and Arctic regions of the Northern Hemisphere. Most species inhabit high-latitude or high-altitude environments. The genus was revised extensively by Saaristo & Marusik in 2004, resulting in numerous new species descriptions.
dwarf spiders
Oreonetides is a genus of dwarf spiders in the family Linyphiidae, first described by Embrik Strand in 1901. The genus contains 17 described species distributed across the Northern Hemisphere, with records from North America, Europe, Russia, and East Asia. Species occupy diverse habitats ranging from boreal and alpine regions to temperate forests. The type species, Oreonetides vaginatus, has the broadest distribution, spanning from North America across Eurasia to Japan.
Undergrowth Sheet-web Weaver
Oreonetides vaginatus is a small sheet-web weaving spider in the family Linyphiidae. It has been documented across a broad Holarctic distribution spanning North America, Europe, and Asia. The species inhabits undergrowth and ground-level vegetation, constructing characteristic sheet webs. Despite its wide geographic range, detailed natural history information remains limited.
Orodrassus canadensis is a ground spider in the family Gnaphosidae, first described by Platnick & Shadab in 1975. It is a small to medium-sized spider native to North America, with documented records in Canada and the United States. As a member of the ground spider family, it is likely adapted to terrestrial hunting rather than web-building. The species remains poorly known biologically, with limited published information on its ecology and behavior.
Orthonops lapanus is a small spider species in the family Caponiidae, described by Gertsch and Mulaik in 1940. It belongs to a genus of spiders characterized by reduced eye numbers and elongated bodies. The species is known from limited records in the United States.
Ostearius is a genus of dwarf spiders (family Linyphiidae) established by J. E. Hull in 1911. The genus contains two described species: O. melanopygius and O. muticus. These spiders have been recorded across a broad geographic range including Europe, Africa, Asia, and Oceania.
Grass Lynx Spiders, Lynx Spiders
Oxyopes is a large, globally distributed genus of lynx spiders comprising approximately 279-300 species. Members are characterized by distinctive hexagonal eye arrangements and long, spine-like leg setae. They are active visual hunters that do not construct capture webs, instead employing ambush and stalking strategies to prey on insects. Several species have been documented as significant biological control agents in agricultural systems, particularly in cotton and tea plantations.