Sac spider

Clubiona pallidula, females

Members of the family of the blind spiders ( Clubionidae ) are 5-8 mm wide, usually dark colored, nocturnal hunters. They weave no safety nets, but sneak cautiously to the prey. They also set back longer distances. The day spend most genres protected in a bag-shaped house which they zusammenzurren from plant parts with their spin silk. Others prefer burrows in the ground that they austapezieren with silk. The animals of the genus Actual sack spiders ( Clubiona ) ready for their eggs an elaborately folded and with silk " stitched together " three-walled bag of grass leaves. Sac spiders have eight approximately equal size, light reflective, forward-facing eyes. The front two spinnerets are usually stronger than the rear pair. The two-row arrangement of the eyes, the conical shape of the spinneret and the paired Tarsalklauen be evaluated as plesiomorphic features. The genital structures are similar in basic structure to those in the family of Gnaphosidae. The elongated oval or obovate abdomen ( opisthosoma ) is hairy.

The eponymous and most species-rich genus of sac spiders are the authentics sac spiders ( Clubiona ). Of these, at least 27 species in Central Europe are native. Worldwide, in 2004 the family 531 species in 15 genera on, but the classification of the blind spider is subject to ongoing major changes. So far genera of other families were the " sack spider " attributed to again and again because it reinforces earlier behavioral standards, here spinning a sack approach instead, and. Today reinforced evolutionary aspects such as cladistics and knowledge of genetics apply. It also species from the following families were referred to as " blind spiders " ( and are in doubt to seek ):

• Delicately spiders, Anyphaenidae
• Tengellidae
• Zorocratidae
• Dornfinger spiders, Miturgidae
• Beef sack spider, Corinnidae
• Field spiders, Liocranidae

Of the Clubionidae in the wider sense, even with the inclusion of transferred in these above mentioned families genera, had been suspected for some time that it would " clearly a para, if not polyphyletic group " act. "Obviously, those forms were asked to Clubionidae that were left after establishment of the other families of the Dionycha " was the verdict Ute Grimm in their monograph of the Clubionidae (1986 ), in which they have proven in practice division of Clubionidae into the subfamilies Clubioninae, Liocraninae and Corin Ninae by Simon (1932 ), Reimoser (1937) and Tullgren (1946 ) was followed, although this did not correspond to the predicted relationships in terms of a phylogenetic system.

Genera of the bag Spiders and their dissemination

Cheiracanthium see Dornfinger spiders ( Miturgidae )