Eyes of Southern House Spider and Brown Recluse Compared

The image on the right is an enlargement of the male southern house spider's head, showing details of the eight eyes of this species, in two rows of four eyes each, tightly bunched together so that they dominate the prominent bulge on the spider's pars cephalica. The image to its left is an enlargement of the brown recluse spider's head, for a specimen found in Amarillo. The brown recluse has six small eyes, in three diads (pairs) positioned at the edges of the relatively flat pars cephalica of a very flat carapace. One pair of eyes faces right, one pair faces left, and one pair faces forward. The eyes themselves are often dark--as in this specimen--and each diad is embedded in a dark mask, making the eyes of this specimen impossible to resolve. The posterior median eyes (PME) of the southern house spider, by contrast, are highly reflective. NEXT PAGE ---- PAGE Menu:   1  *  2  *  3  *  4  *  5  *    

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