The web-building behavior and predatory behavior of Theridiosoma epeiroides BÖSENBERG et STRAND (Araneae: Theridiosomatidae) and the origin of the ray-formed web

摘要

References(17) Cited-By(2) The web structure and the predatory behavior of Theridiosoma epeiroides BÖSENBERG et STRAND, were observed.The orb-web of this species represented a unique type. The web had no hub, but had several radii tied together near the center. The spider held up the web with a tight thread in the center, therefore it formed an umbrella turned inside out. When an insect struck the web, the thread was released, so that the web sprang back and caught the insect.The process of web-building was observed, too. It was first spun as a typical orb-web with a hub and several spiral turns in the notched zone, then these thread were bitten out. The proceeding process of web-building suggested that T. epeiroides was derived from orb-weaving ancestor.