- filtered for Great Britain (Mainland)
Images and Species Descriptions
Text and photographs © 2011 Jørgen Lissner
The Spiders of Europe and Greenland
Family: Segestriidae (Six-eyed Spiders)
Biology: A small family which sometimes is considered just a subfamily of Dysderidae.
Genus: Segestria Latreille, 1804
Characters of genus: Large six-eyed spiders with elongate abdomen and having the three anterior pairs of legs directed forward. Males and females are alike, but males have a slimmer and smaller abdomen. There are three species in Northern and Central Europe, which all build tubular retreats in cracks of walls, cliffs and trees and under stones. About 10-15 threads radiat from the entrance hole of the retreat and serve as detectors of prey location. Once prey touch a thread the spider will rush out to attack and seize the prey, and then take it back to to the retreat for consumption.
Segestria bavarica C. L. Koch, 1843
Description: Usually somewhat larger than S. senoculata and appearing more greyish due to the much denser hairs. A central light band divedes the lobes on the abdomen in two halves. Size: Female 10-13 mm; male 9-11 mm. Maturity: Spring to autumn. Habitat: Holes in walls, cracks in cliffs and under stones. To the south of Denmark, the species is also encountered behind bark of forest trees. Range: Austria, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, France (Mainland), Germany, Great Britain (Channel Islands), Great Britain (Mainland), Greece (Crete), Greece (Mainland), Hungary, Italy (Mainland), Italy (Sicily), Liechtenstein, Netherlands, Poland, Portugal (Mainland), Romania, Slovakia, Slovenia, Spain (Balearic Islands), Spain (Canary Islands), Spain (Mainland), Sweden, Switzerland, Ukraine, Yugoslavia (van Helsdingen 2009.1). Global range: Europe to Azerbaijan (Platnick 10.0).
Male.
Female.
Female.
Segestria florentina (Rossi, 1790)
Range: Andorra, Belgium, Bulgaria, Croatia, France (Corsica), France (Mainland), Germany, Great Britain (Channel Islands), Great Britain (Mainland), Greece (Crete), Greece (Cyclades), Greece (Dodecanese Islands), Greece (Mainland), Hungary, Italy (Mainland), Italy (Sardinia), Italy (Sicily), Macedonia, Netherlands, Portugal (Azores), Portugal (Madeira), Portugal (Mainland), Portugal (Selvagens Islands), Romania, Slovakia?, Slovenia, Spain (Balearic Islands), Spain (Canary Islands), Spain (Mainland), Switzerland, Ukraine (van Helsdingen 2009.1). Global range: Europe to Georgia (Platnick 10.0).
Female.
Female, note the characteristic green metallic sheen on the chelicers.
Female.
Female, closeup of abdomen.
Female.
Female.
Female, this species does not possess an epigyne.
Juvenile.
Juvenile.
Web.
Web.
Segestria senoculata (Linnaeus, 1758)
Description: Cephalothorax dark brown with head region darker. It differs from the second Danish species of the genus, S. bavarica, by having only a few thin hairs on the cephalothorax. The abdomen is elongate wiht dark lobed median band and lighter sides with dark spots. Legs are ligth brown with dark annulations rather far spaced apart. Size: Female 7-10 mm; male 6-9 mm. Maturity: Spring to autumn. Habitat: Most commonly found behind bark on the stems of trees, but also found i holes of walls and under stones. Range: Andorra, Austria, Belarus, Belgium, Bulgaria, Croatia, Czech Republic, Denmark, Finland, France (Corsica), France (Mainland), Germany, Great Britain (Channel Islands), Great Britain (Mainland), Great Britain (Northern Ireland), Greece (Crete), Greece (Mainland), Hungary, Ireland, Italy (Mainland), Italy (Sardinia), Liechtenstein, Lithuania, Luxemburg, Macedonia, Malta, Moldova, Netherlands, Norway (Mainland), Poland, Portugal (Mainland), Romania, Russia (NW. European)?, Slovakia, Slovenia, Spain (Balearic Islands), Spain (Mainland), Sweden, Switzerland, Ukraine, Yugoslavia (van Helsdingen 2009.1). Global range: Palearctic (Platnick 10.0).
Male.
Female.