|Publication Type:||Journal Article|
|Year of Publication:||2007|
|Authors:||G. Barrantes, Eberhard W. G.|
|Journal:||Journal of Natural History|
|Keywords:||Animal constructions, Appendages, Araneae (Arachnida)., Araneae [Silk / / Evolutionary origins of use in prey wrapping, behaviour] [Phylogeny / / Prey wrapping behaviour, Ecology, Evolution, evolutionary origins, Feeding behaviour, General morphology, Nesticidae, Nesticidae (Araneae)., Nutrition, of silk use] [Cocoons / / ]., possible synapomorphy] [Food handling /, Prey wrapping / Involvement of legs IV] [Phylogeny / Synapomorphy / Prey, Silk glands, Synotaxidae, Synotaxidae (Araneae)., Systematics, Theridiidae (Araneae)., Theridiidae [Prosomal legs / Legs IV / Prey, use of legs IV]., wrapping behaviour, wrapping behaviour involvement|
We traced the evolution of silk use by spiders in attacks on prey by combining previous publications with new observations of 31 species in 16 families. Two new prey-wrapping techniques are described. One, in which the spider holds a tense line (often covered with viscid silk) with both legs IV and applies it to the prey with a simultaneous movement of both legs, may be a synapomorphy linking Theridiidae, Nesticidae, and Synotaxidae. The other, in which the spider stands over the prey and turns in place, is apparently very ancient; it occurs in Theraphosidae, Tengellidae, and Agelenidae. The use of legs IV to wrap prey is described for the first time in Filistatidae and Scytodidae. Using a recent phylogeny of spiders, we propose that prey wrapping with legs IV has evolved convergently at least four times. We propose that prey wrapping originally evolved from egg-sac construction behaviour.
|URL:||<Go to ISI>://ZOOREC:ZOOR14312075231|