Eratigena atrica. This male house spider frightens in autumn many North Europeans when running through their houses looking for a female . |
There are 28 species known in northern Europe, belonging to eight genera. Most spiders of this family have elongated spinners and an oval shaped abdomen. |
Genus Agelena / Allagelena
Agelena labyrinthica male
These spiders live in webs that are woven horizontally
between grasses, brushes and tree roots.
Their thorax is flat and they have long and hairy legs. The woven web looks like a wide spread
funnel.
The spider hides in a secondary tube-like web that is adjacent to the catching
web.
Agelena labyrinthica her webs can be up to 50 cm diameter while those of
The genus Allegelena contains one species; Allagelena gracilens
Agelena labyrinthica female and male The spider lives in low vegetation and shrubs. The female guards her eggs until her death. |
|
Agelena labyrinthica female | Agelena labyrinthica male |
Allagelena gracilens resembles A. labyrinthica but is smaller. Their size is between 5 and 10 mm. |
Allagelena (Agelena) gracilens with hardly any markings left in her abdomen |
Agelena similis similar to A. labyrinthica but has a red-brown stripe on his belly. |
Allagelena (Agelena) gracilens | Allagelena (Agelena) gracilens |
Genus Eratigena (replaced from Tegenaria)
These spiders die a lot in clothes, brooms and vacuum cleaners. Eleven species
are known in NW-Europe. Most species make sheet webs with a tubular retreat
at one side. Females of the species living in houses are known to live for several
years. The spider spends most of its times on its web but in the late summer
and the autumn the male starts looking for a female. The long legged male start
wandering through the house and sometimes frightens us. Males live with their
mates for several weeks.
The female remains with their egg sac until the spiderlings
emerges and walk away.
Some members of this family where moved in 2005 from Tegenaria to Eratigena.
Eratigena (was Tegenaria) atrica is between 6 and 10 mm large. Its markings are variable
Close-up of Eratigena atrica our house spider | |
Eratigena atrica male left and female right | |
The spiders originally lived in and around caves. They can run very fast on their long legs. Their catch flies, ants and other insects. The web has a tube like living room and has in the front the shape of an upside down funnel where there are a lot of stumbling threads. |
|
Youngsters just after hatching and after changing their skin. Note the light empty skins. | Eratigena agrestris |
Eratigena agrestris is also know in the USA as Hobo spider. This spider was brought by the Pelgrim fathers to the USA. It was first discovered in 1930 and since the 1960s has become one of the commonest house spiders in the Pacific North West because it has almost no natural predator. Eratigena atrica seems to be one of its predators. It was is thought that a bite of this American spider would cause necrosis, a severe tissue damage. There are no records of this nasty behaviour of the European species. Recent studies of Bennet and Vetter shows that all these believes are wrong. Often the spider is even blamed for necrosis outside the region where it lives (The four North-Western states of the USA and British Columbia in Canada). The message is: The hobo spider does not cause necrosis. |
|
Eratigena atrica /duellica (gigantea) ©Lionel Dabat |
Eratigena atrica / duellica) by Mick Thomson |
Eratigena atrica | Eratigena atrica |
Tegenaria ? male | Tegenaria ? male |
Genus Histopona
In our region only one species occur. Histopona torpida is between 5 and 7 mm long.
They live on the ground between stone and wood in the neighbourhood of forests.
Histopona torpida (NP Hoge Veluwe) | Histopona torpida |
Genus Tegenaria
Tegenaria ferruginea |
Tegenaria ferruginea |
Tegenaria ferruginea or charcoal spider is a common spider. The spider has brown spots on its abdomen. |
|
Tegenaria ferruginea |
Tegenaria ferruginea |
Tegenaria ferruginea with egg-sac (Hans Jonkman) |
Tegenaria silvestris is a rare spider found in caves |
Tegenaria parietina male |
Tegenaria parietina male |
Genus Textrix
This beautiful spider is 6 - 8 mm long. The spider is very fast. |
|
Web silk released from its spinnerets | Detail of the male palp |
Textrix denticulata detail of the female | Textrix denticulata |
Textrix denticulata in her web |
Textrix denticulata male |
Ed Nieuwenhuys,
23 march 2023
19 december 2019,
12 February 2012, 29 December 2011, 4 August 2011, December 24, 2008,26 october 2005, 15 December 1996