Translator Disclaimer
1 April 2004 WEB BUILDING BEHAVIOR AND THE PHYLOGENY OF AUSTROCHILINE SPIDERS
Author Affiliations +
Abstract

We report on the natural history and web building behavior of the South American austrochilids Thaida peculiaris and Austrochilus forsteri, relatively basal lineages within Araneomorphae. Species of these two cribellate genera construct large, two-dimensional sheet webs with a funnel retreat. When combing cribellate silk, austrochilids use both fourth legs, like entelegyne spiders, and unlike Hypochilidae and Filistatidae. Furthermore, the alternancy of combing legs IV is determined by the leg III involved in the attachment of a cribellate segment; the leg IV ipsilateral to the leg III that made the attachment will comb the next segment, except for the first segment. This similarity to Entelegynae in combing with both fourth legs contradicts current hypotheses of basal araneomorph relationships and suggests that the Austrochilidae may be the sister group of entelegyne spiders.

Lara Lopardo, Martín J. Ramírez, Cristian Grismado, and Luis A. Compagnucci "WEB BUILDING BEHAVIOR AND THE PHYLOGENY OF AUSTROCHILINE SPIDERS," The Journal of Arachnology 32(1), (1 April 2004). https://doi.org/10.1636/H02-45
Received: 19 August 2002; Published: 1 April 2004
JOURNAL ARTICLE
13 PAGES


SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top