Palaeontology: spider-web silk from the Early Cretaceous.
The use of viscid silk in aerial webs as a means to capture prey was a key innovation of araneoid spiders and has contributed largely to their ecological success. Here I describe a single silk thread from a spider's web that bears glue droplets and has been preserved in Lebanese amber from the Early Cretaceous period for about 130 million years. This specimen not only demonstrates the antiquity of viscid silk and of the spider superfamily Araneoidea, but is also some 90 million years older than the oldest viscid spider thread previously reported in Baltic amber from the Eocene epoch.
Zschokke
Samuel
S
Department of Integrative Biology, Section of Conservation Biology, University of Basel, 4056 Basel, Switzerland. samuel.zschokke@alumni.ethz.ch
D000269:Adhesives; D018647:Amber; D000818:Animals; D005580:Fossils; D019476:Insect Proteins; D007861:Lebanon; D047011:Silk; D013112:Spiders / Q000145:classification / Q000502:physiology*; D013997:Time Factors
D000269:Adhesives; D018647:Amber; D019476:Insect Proteins; D047011:Silk