What feature characterizes a brown recluse spider?

The feature that characterizes a brown recluse spider is the violin-shaped marking on the cephalothorax. This distinct marking is a key identifying characteristic of the species and helps differentiate it from other spiders. The violin shape is often dark brown and positioned near the head, pointing towards the abdomen, making it a notable physical attribute.

In addition to the marking, brown recluse spiders are typically small, ranging from about 6 to 20 millimeters in body length, and they are not known for their leg length or large size. Understanding these identifying features is critical for accurate identification, especially since they may be confused with other spider species that do not share the same marking. Thus, recognizing the violin-shaped marking is essential for anyone studying or needing to identify brown recluse spiders, knowing it plays a significant role in both entomology and pest control practices.