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Tegenaria
Tegenaria
Tegenaria
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Tegenaria
Temporal range: Palaeogene–present
A female Tegenaria domestica
T. parietina
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Agelenidae
Genus: Tegenaria
Latreille, 1804[1]
Type species
T. domestica (Clerck, 1757)
Species

139, see text

Synonyms
  • Aranea Linnaeus, 1758 (Suppressed)
  • Trichopus Templeton, 1834
  • Philoica Koch, 1837
  • Drassina Grube, 1862
  • Mevianops Mello-Leitão, 1941
  • Philoicides Mello-Leitão, 1944
  • Iamatega Kishida, 1955
  • Sabitega Kishida, 1955

Tegenaria is a genus of fast-running funnel weavers that occupy much of the Northern Hemisphere except for Japan and Indonesia. It was first described by Pierre André Latreille in 1804,[2] though many of its species have been moved elsewhere. The majority of these were moved to Eratigena,[3] including the giant house spider (Eratigena atrica) and the hobo spider (Eratigena agrestis).[1]

Life style

[edit]

They construct a typical non-sticky funnel web with flat open sheet like area, usually in dark corners, commonly in outbuildings.[4]

Mating takes place during the summer months.[4]

Identification

[edit]

Tegenaria can be difficult to identify because they resemble wolf spiders and other funnel-web spiders in their area,[5] unless found in an area where they do not occur naturally.[6] They live on sheet webs, usually stretching across the corner between two walls. They have eight eyes in two straight or almost straight rows.[6] Size varies from one species to another, but the body length of adults can range from 10 millimetres (0.39 in) to 20 millimetres (0.79 in), not including the legs.[5] The cardinal spider is the largest funnel weaver, with females that can grow up to 18 millimetres (0.71 in) long.[7]

With access to a microscope, Tegenaria can be distinguished from other members of Agelenidae (particularly Eratigena) by its 3 to 7 large teeth present in its cheliceral retromargin (Eratigena has 6 or more teeth, and distal teeth smaller than proximal teeth). Additionally, Tegenaria epigyna will be broader than long, whereas Eratigena epigyna will be close to longer or longer than broad.[8]

Species

[edit]
  • T. ferruginea
    T. ferruginea
  • T. silvestris
    T. silvestris
  • T. zamanii
    T. zamanii

As of September 2025, this genus includes 139 species:[1]

References

[edit]
[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Tegenaria

View on Grokipedia
from Grokipedia
Tegenaria is a of funnel-weaver spiders in the family , comprising 135 valid species primarily distributed across the Holarctic region, including , Central , and parts of where some species have been introduced. The genus was established by in 1804, with the type species Araneus domesticus Clerck, 1757 (currently recognized as ). Synonyms of the genus include Philoica C. L. Koch, 1837, and Trichopus C. M. Templeton, 1834, with the name Tegenaria conserved by the in 2009. A significant taxonomic revision in 2013 focused on the European Tegenaria- Malthonica complex, utilizing morphological characters (such as spination, morphology, and genital structures) and molecular data from genes like CO1, NADH1, and 28S rRNA, resulting in the description of a new gen. nov., along with 17 new synonyms, 20 new combinations, and the reinstatement of 14 species. This revision reduced the number of species retained in Tegenaria sensu stricto in to about 20, while the broader now encompasses many non-European taxa, particularly from . Species of Tegenaria are typically medium-sized arachnids, with adults ranging from 5 to 20 mm in body length, featuring a brownish coloration often with indistinct patterns on the and , and long, hairy legs adapted for rapid movement. They construct characteristic funnel-shaped webs consisting of a flat, tangled sheet over which a tubular retreat is built, typically in sheltered, humid microhabitats such as under rocks, in leaf litter, caves, or human structures. These spiders are predators that detect vibrations from prey on the web sheet and rush out from the to capture , employing speed rather than sticky . While most Tegenaria inhabit natural or semi-natural environments and are not highly synanthropic, some like T. domestica are cosmopolitan and commonly found indoors due to human-mediated dispersal. The includes ecologically diverse , some of which are troglophilic (cave-dwelling) and contribute to subterranean food webs.

Taxonomy and classification

History and etymology

The genus was established by the French entomologist in 1804 as part of his systematic classification of insects in the Nouveau Dictionnaire d'Histoire Naturelle. Latreille's work placed Tegenaria within the broader context of , distinguishing it based on morphological characteristics such as leg structure and web-building behavior, though the initial description was brief and encompassed a diverse array of funnel-weaving spiders. The name Tegenaria derives from Latin tegena, referring to a type of cobweb or , which aptly describes the funnel-shaped webs constructed by species in this . The is Tegenaria domestica (Clerck, 1757), originally described as Araneus domesticus by Carl Clerck in his seminal 1757 work Svenska Spindlar, making it the nomenclatural benchmark for the . Throughout the 19th century, Tegenaria underwent several reclassifications, with historical synonyms including Aranea Linnaeus, 1758 (later suppressed by the in 2009), Trichopus C.M. Templeton, 1834, and others such as Philoica C.L. Koch, 1837, reflecting evolving understandings of phylogeny at the time. A major taxonomic revision occurred in 2013, when Bolzern, Burckhardt, and Hänggi's phylogenetic analysis, combining morphological and molecular data, redefined Tegenaria and erected the sister Eratigena gen. nov., transferring 20 species—including T. agrestis (now Eratigena agrestis) and T. atrica (now Eratigena atrica)—to better reflect monophyletic groupings within the family.

Phylogenetic position

Tegenaria belongs to the kingdom Animalia, phylum Arthropoda, class Arachnida, order Araneae, and family , commonly known as funnel-weaver spiders. Within , the genus is placed in the subfamily Tegenariinae, which encompasses genera characterized by specific silk gland configurations and web architectures adapted for temperate environments. This classification reflects the family's broader enneaean lineage, where diverged early among araneomorph spiders, sharing traits like retrolateral tibial apophysis in male palps with related families such as Pisauridae. Phylogenetically, Tegenaria forms part of the Tegenaria-Malthonica complex, which has undergone significant revision based on integrated morphological and molecular analyses. A key 2013 study using and maximum parsimony on mitochondrial and nuclear genes (COI, NADH1, 28S) redefined the complex, splitting off the sister genus gen. nov. from former Tegenaria species; Tegenaria stricto now excludes larger European house spiders previously included, distinguishing it by smaller body size, banded legs, and subtle genitalic differences like the shape of the conductor in male palps. This split highlights Tegenaria's closer affinity to Malthonica within Tegenariinae, contrasting with the more basal Ageleninae genera like Agelena, from which it differs in cheliceral (fewer teeth) and web structure—funnel-shaped retreats versus open sheet webs. The temporal range of Tegenaria extends from the Palaeogene to the present, with the family's earliest confirmed fossils appearing in Eocene deposits, indicating an ancient origin for funnel-weaving behaviors within . Evolutionarily, Tegenaria species represent a derived lineage from ancestral wandering hunters, having adapted specialized sheet-funnel webs for prey capture in temperate zones; this shift likely enhanced ambush efficiency in cooler, structured habitats compared to the active of earlier agelenid ancestors. Such adaptations underscore the genus's role in the family's radiation, prioritizing silk-mediated predation over hunting.

Physical description

Morphology

Tegenaria spiders possess a characteristic body plan typical of the family , featuring a and joined by a narrow pedicel. Adult individuals typically measure 10–20 mm in body length, though this varies by and sex. The is somewhat flattened and bears eight eyes arranged in two nearly straight transverse rows, consisting of four anterior eyes (two median and two lateral) and four posterior eyes. The legs are long and thin, suited for rapid locomotion, with a typical leg formula of 4-1-3-2, indicating that the fourth pair is the longest followed by the first, third, and second pairs. The are robust and slightly geniculate, equipped with 3–7 large teeth on the promargin for seizing prey. The is oval and clothed in fine hairs or setae, with prominent spinnerets at the posterior end facilitating production. Coloration across the is predominantly brown or gray, frequently accented by darker chevron-like patterns that enhance against substrates. Sexual dimorphism is evident in size, with females generally larger than males, and in secondary sexual structures such as the male pedipalps and female .

Sexual dimorphism

Sexual dimorphism in the genus Tegenaria is pronounced, particularly in body size and reproductive structures, reflecting adaptations for reproduction in these funnel-web spiders. Females are generally larger than males, a pattern consistent across species such as T. parietina and T. domestica. This size disparity arises from female-biased sexual size dimorphism common in , where females develop more robust abdomens to accommodate egg production and storage. In males, the pedipalps are modified into primary sexual organs, featuring a bulbous appearance often likened to due to the enlarged cymbium and . These structures include an , a pointed sclerite for transfer, and a conductor, a guiding sheath that directs the embolus during copulation, enabling precise into the female's genital opening. This modification is essential for species-specific and is a key diagnostic trait in taxonomic identification. Females possess an , the external genital plate on the ventral , which is typically broader than long and features distinct sclerites surrounding the copulatory openings. The epigyne's morphology, including a posterior sclerite and atrial structures, varies subtly among and serves as a critical tool for identification, as seen in T. domestica where it includes a pale membranous area medially. These structures protect the internal spermathecae and ensure compatibility during mating.

Habitat and distribution

Geographic range

The genus Tegenaria is primarily native to , occurring across and Asia, with limited native presence in and the notable exception of and . Introduced populations of several Tegenaria species have become widespread in human-modified environments beyond their native ranges, such as T. domestica in and . Biogeographically, Tegenaria exhibits a predominantly Holarctic distribution, with significant species diversity in Europe (approximately 20 species) and higher in Asia. The spread of synanthropic species within the genus has historically been mediated by human trade and transport, contributing to their cosmopolitan presence in built environments. As of November 2025, the genus comprises approximately 139 valid species, many of which continue to expand their ranges through association with human activity.

Habitat preferences

Tegenaria spiders are primarily found in temperate regions of the Northern Hemisphere, where they inhabit a variety of natural and human-modified environments. In natural settings, species such as Tegenaria domestica and Eratigena agrestis (formerly T. agrestis) prefer secluded microhabitats like under loose bark on trees, within rock crevices, and amid leaf litter in forested areas and open grasslands, providing shelter from predators and environmental fluctuations. These spiders exhibit strong synanthropic tendencies, frequently colonizing human structures where they thrive in basements, sheds, garages, and other enclosed spaces. This association is particularly evident in species like the barn funnel weaver (T. domestica), which readily establishes populations in disturbed, anthropogenic habitats alongside their natural preferences. Tegenaria species favor temperate climates, avoiding extremes of cold or heat, and remain active throughout the year in milder conditions. They demonstrate tolerance to a broad temperature range indoors, from approximately 5°C to 25°C, as observed in related synanthropic forms like atrica (formerly T. atrica), with preferred temperatures around 14°C supporting development and activity. Within both natural and built environments, Tegenaria spiders select dark, undisturbed corners that maintain relatively high levels, which stabilize their sheet-like webs and facilitate prey capture. These microhabitats, often moist and sheltered, enhance survival by minimizing and exposure. Adaptations to indoor conditions include resilience to low light levels, as these largely nocturnal spiders rely on vibratory cues rather than vision, and physiological flexibility to fluctuating temperatures and in dwellings. This versatility has enabled widespread establishment in urban and suburban settings across their range.

Behavior and

Web building and hunting

Tegenaria spiders, members of the family , construct distinctive sheet-like funnel webs characterized by a horizontal platform of non-sticky threads stretched over a flat surface, typically spanning several centimeters in area, connected to a tubular retreat that serves as a hiding place. These webs feature additional vertical lines above the sheet to impede flying , directing them onto the capture platform below, and are often built in dark, moist environments such as basements, cracks in walls, woodpiles, or under outdoor debris. The funnel retreat, usually narrow and extending into a protected crevice, allows the to remain concealed while monitoring the web; these structures are frequently rebuilt or repaired to ensure optimal prey detection and capture efficiency. In terms of hunting behavior, Tegenaria individuals adopt an active strategy, positioning themselves at the entrance with legs extended to sense vibrations transmitted through the from disturbed prey. Upon detecting a potential meal, the rapidly dashes across the sheet—leveraging its long legs for speed—to seize the entangled with its forelegs and deliver a venomous bite via fangs, subduing the prey without the need for extensive silk wrapping, which is uncommon in this . Their diet primarily consists of small such as flies, beetles, and moths that inadvertently land on the web, though they occasionally consume other small s or arthropods; juvenile Tegenaria may resort to intraspecific when food resources are scarce, enhancing survival under limited conditions. Tegenaria species exhibit predominantly nocturnal activity, emerging at night to tend their webs and hunt, which minimizes exposure to diurnal predators. Outside the breeding season, males in particular display nomadic tendencies, wandering greater distances and potentially constructing temporary webs or forgoing them altogether in pursuit of females, thereby expanding their foraging range.

Reproduction and life cycle

Mating in Tegenaria spiders typically occurs from late summer to autumn, when mature males search for females on or near their webs. Males initiate by producing vibrations through leg tapping, palp drumming, and walking on the female's web, which helps distinguish them from prey and reduce the risk of . These signals, along with contact pheromones detected via chemoreceptors on the male's pedipalps, facilitate species recognition and receptivity. During copulation, males transfer sperm using their modified pedipalps, inserting it into the female's epigynum for storage in the spermathecae until fertilization. is pronounced in the pedipalps, which are enlarged and specialized in males for this purpose. Post-mating, males often remain near the female but typically die shortly after, sometimes consumed by the female in an act of . Females may mate with multiple males to increase in offspring. Fertilized females produce one to several silken egg sacs, each containing 36–147 eggs, typically 14–20 days after mating. These spherical or oval cocoons are guarded by the female in a silk-lined retreat, such as a web corner or crevice, for several weeks or through winter, providing protection against predators and environmental threats. Egg hatching occurs after overwintering, typically in spring (4–6 months later), depending on temperature and species, releasing spiderlings that remain nearby or disperse short distances by walking. The life cycle of Tegenaria species spans 1–2 years, with juveniles undergoing 8–10 molts to reach maturity. Spiderlings emerge in spring and feed actively through summer, overwintering as subadults in sheltered locations before maturing the following autumn. This annual or biennial cycle allows with seasonal prey availability, though can extend up to several years in protected habitats.

Species diversity

Number and distribution of species

The Tegenaria currently includes 141 valid species, according to the as of November 2025. A major taxonomic revision in 2013 by Bolzern et al. restructured the Tegenaria-Malthonica complex, establishing the new Eratigena and transferring 20 species from Tegenaria to it (20 new combinations), along with describing seven new species; this reduced the count in Tegenaria from previous estimates around 100–110 primarily Palaearctic species. Species diversity is concentrated in , with over 100 species particularly in and the , while approximately 20 species occur in , with hotspots in the Mediterranean Basin, , and . A few species are recorded in , largely as introduced populations, such as T. domestica and T. pagana. Recent additions include T. ballarini (2024) from and T. amirani (2025) from the , reflecting ongoing taxonomic work. Endemism is prominent in Mediterranean regions, such as Tegenaria azilaneensis restricted to and Tegenaria chiricahuae to the . Conversely, T. domestica exhibits a cosmopolitan range, native to the Holarctic but widely introduced to the Neotropics, , and parts of . Most Tegenaria species are widespread synanthropic or forest dwellers with no formal IUCN assessment, implying least concern status for the majority, though narrow-range endemics on islands or in fragmented habitats face potential vulnerability from habitat alteration.

Notable species

Tegenaria domestica, commonly known as the common or barn funnel weaver, is a synanthropic species with a body length of 6–11.5 mm, characterized by its pale brown coloration and banded legs. It constructs funnel-shaped sheet webs in human structures such as homes, sheds, and garages, where it ambushes small like flies and pests. This species is cosmopolitan and widespread, having been introduced to new continents, including , likely through international shipping of goods. As a generalist predator, T. domestica contributes to natural by consuming household , reducing populations of nuisance arthropods in urban environments. Tegenaria parietina, the cardinal spider, is the largest native spider in the , with females reaching a body length of up to 20 mm and males exhibiting extreme , with legs nearly twice as long as those of females, resulting in a leg span of up to 120 mm. Native to the UK, it is widespread in and eastern , extending across from to and to . This species inhabits old buildings, ivy-covered walls, and hedges, occasionally venturing into homes, and adults are most active in late summer and autumn. Formerly classified as Tegenaria gigantea, the giant house spider is now placed in the genus Eratigena following taxonomic revisions based on morphological and genetic analyses, reflecting its distinct funnel-web building and genital structures. This large, fast-moving species, with females up to 18 mm in body length and a leg span of about 45 mm, was historically included in Tegenaria but reclassified in 2013 to better delineate Nearctic and European agelenids. Known for its speed, reaching up to 0.5 m/s, it inhabits similar synanthropic niches as other Tegenaria species but is noted for its rapid retreats into web funnels. Ecologically, Tegenaria species play a key role in by preying on in and around human dwellings, with T. domestica particularly effective against invasive pests due to its global spread via human transport. These spiders enhance urban by regulating populations, though their synanthropic habits make them common in homes across their ranges.

Identification

Diagnostic features

Tegenaria spiders exhibit several key morphological traits that facilitate identification at the level. The eyes are arranged in two rows of four, with the anterior row straight to moderately procurved and the anterior median eyes smaller than or subequal to the anterior lateral eyes, while the other eyes are subequal. The are slightly to moderately geniculate, featuring 3–5 teeth on the promargin and 3–5 teeth plus 1–3 smaller denticles on the retromargin. In females, the epigyne is typically broader than long and characterized by a simple atrium with a weakly to strongly sclerotized median plate. Leg spination is sparse overall, with ventral spines present on the metatarsi I and II, and the legs covered in plumose setae. Tegenaria species construct funnel-shaped sheet webs, a trait that distinguishes them from orb-weaving spiders.

Distinction from similar genera

Tegenaria species are closely related to those in the genus Eratigena, which was elevated from subgenus status within Tegenaria based on phylogenetic analysis of morphological and molecular data. Key distinctions include the epigyne structure, where Eratigena females have an epigyne longer than broad, contrasting with the broader or more rounded epigyne in Tegenaria. Tegenaria species also typically exhibit annulated legs, whereas Eratigena legs are plain and unbanded. Additionally, Eratigena spiders are generally larger, with body lengths up to 25 mm, compared to the typically smaller Tegenaria species (under 15 mm). A notable example is the hobo spider (Eratigena agrestis, formerly Tegenaria agrestis), which exhibits these traits and is now classified in Eratigena following the taxonomic revision. In comparison to Agelena, another agelenid , Tegenaria spiders construct funnel-sheet webs integrated into house-like retreats, often in sheltered or indoor environments, whereas Agelena builds more expansive, grass-like webs in . Eye arrangement further aids distinction: Tegenaria has relatively straight anterior and posterior eye rows, while Agelena features curved or procurved rows, with the posterior row strongly recurved. Tegenaria differs markedly from in the family Lycosidae, which are active hunters that do not construct webs but instead pursue prey directly on the ground. In contrast, Tegenaria relies on funnel-sheet webs for prey capture. also possess a —a reflective layer behind the in four principal eyes—enhancing their low-light vision for nocturnal hunting, a feature absent in Tegenaria and other agelenids. Sac spiders of the genus Clubiona (family Clubionidae) can be confused with Tegenaria due to superficial similarities in body form, but their differ: Clubiona has prominent, forward-projecting with parallel fangs that close in a scissor-like motion, adapted for active hunting without webs. Tegenaria, conversely, has less robust with more paraxial fang orientation suited to web-based predation. Clubiona species are wandering hunters that do not build capture webs, unlike the sedentary funnel-web builders of Tegenaria. Identification of Tegenaria can be challenging, particularly for juveniles, which resemble many other agelenids in external morphology and require for definitive species-level determination. Adults may also necessitate examination of palpal organs or under to distinguish from confusable genera.

References

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