Araneus illaudatus

Classification

Pronunciation

How to pronounce Araneus illaudatus: /ˌærəˈniːəs ɪˌlɔːˈdeɪtəs/

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Images

Summary

Araneus illaudatus, or the Texas orb-weaver, is a large orb-weaving spider recognized for its distinctive color and markings. It inhabits regions in western Texas and eastern Arizona, playing a role in the ecosystem as a predator of insects.

Physical Characteristics

The female Araneus illaudatus is a large orb-weaver, up to 25 mm in length (excluding legs) with a dirty white color, sometimes exhibiting a pinkish tinge. Distinctive features include two roughly triangular dark patches on the front of the abdomen, each containing a small white spot. The male is much smaller, reaching only 9 mm in length.

Identification Tips

Look for two triangular dark patches on the abdomen of the female, which can help distinguish it from similar species, particularly Araneus gemma.

Habitat

This species prefers open areas and can be found in gardens and around structures in western Texas and eastern Arizona.

Distribution

The Texas orb-weaver is distributed primarily in western Texas and eastern Arizona, with a range extending to California, Utah, and Oregon.

Diet

Araneus illaudatus primarily feeds on insects, which it captures using its web.

Life Cycle

The life cycle details are not specified, but orb-weavers typically undergo a complete metamorphosis with an egg stage followed by juvenile stages before reaching adulthood.

Reproduction

This species reproduces sexually, and females typically produce egg sacs in which they deposit their eggs.

Ecosystem Role

As a spider, Araneus illaudatus serves an important role as a predator, helping to control insect populations in its habitat.

Collecting Methods

  • Netting from webs
  • Hand collecting

Preservation Methods

  • Ethanol
  • Point mounting

Evolution

First described in 1936 by Willis J Gertsch and Stanley B. Mulaik, originally classified as Aranea illaudata. It is closely related to Araneus gemma.

Similar Taxa

Tags

  • Araneidae
  • Texas orb-weaver
  • spider
  • Araneus