What shape is a brown recluse spider?

The brown recluse spider is distinctive for its violin-shaped mark located on the cephalothorax, which is the part of the spider's body where the head and thorax merge. This marking is a key identifying feature and resembles the shape of a violin, hence the name "brown recluse."

Understanding the markings and body shape of the brown recluse is crucial for recognizing this spider, especially since it can be confused with other species. The color of the spider is generally a brownish hue that can vary in intensity, but it is the violin shape that stands out as a definitive characteristic.

The other options do not accurately describe the physical characteristics of a brown recluse spider. For instance, a round and hairy body is not typical of this species, as they have a more flattened, smooth body contour. Similarly, descriptions suggesting a flat and elongated or triangular body shape with long legs do not align with the well-documented morphology of a brown recluse. Recognizing these traits can help in identification and understanding the potential risks associated with this spider.