The Arachnida Theridiidae, commonly known as the tangle-web spiders or cobweb spiders, are a diverse family of arachnids frequently found in the Comunidad Valenciana. These spiders are known for their tangled, irregularly shaped webs which they use to ensnare prey.

Key Characteristics:

• Size: Theridiidae spiders vary in size, but most are relatively small, ranging from just a few millimeters to about a centimeter in length.
• Coloration: They exhibit a wide range of colors, from light brown to darker patterns. Some species feature distinct markings.
• Body Structure: These spiders have a globular abdomen and slender legs which contribute to their agile movement.
• Web Structure: Their webs are irregularly shaped and often placed in corners or other concealed locations, making them less conspicuous than orb webs.

Habitat and Behavior:

• Habitat: Theridiidae can be found in a variety of environments within the Comunidad Valenciana, including gardens, wooded areas, and even inside human structures.
• Prey Capture: They employ sticky silk to capture insects and other small arthropods. These spiders are sit-and-wait predators, relying on their webs to bring prey to them.
• Beneficial Role: Despite their often misunderstood presence, they play a critical role in controlling pest populations.

Some local species, like the notorious Latrodectus tredecimguttatus, also known as the European black widow or viuda negra, are particularly renowned for their potent venom, sparking a mix of fear and fascination.

In conclusion, the Arachnida Theridiidae family encompasses a varied group of spiders that contribute to the ecological balance, and their presence in the Comunidad Valenciana underscores the rich biodiversity of the region.