bronze jumping spider

not listed

NNR - Unranked

SNR - Unranked

not listed

Bronze jumping spider is a small to medium-sized brown jumping spider. It occurs across North America from Quebec and Alaska to Florida and Mexico, and in Central America. It is common in Minnesota.

The male is 3 ⁄16″ to ¼″ (5 to 7 mm) long not including the legs. It is brown and is covered with gray and black hairs.

The plate covering the cephalothorax (carapace) is dark brown and longer than wide. There are four pairs of eyes arranged in what appears to be three rows occupying a little less than half of the length of the carapace. The first row of four eyes, consisting of the anterior median eyes (AME) and anterior lateral eyes (ALE), is curved backward. The AME are the middle and forward-most pair of these. They are by far the largest of all of the eyes and can be moved. The AME are about twice as large as the ALE. The second row of two eyes are the posterior median eyes (PME). They are very small and are barely or not at all noticeable on most photos. The third row of eyes is the posterior lateral eyes (PLE). The PLE are set far back on the head and are almost exactly as far apart as the ALE. On each side of the carapace a white stripe begins below the PLE and extends back toward but not all the way to the rear margin. The plate on the face above the mouth (clypeus) is white and a oblique, very narrow white line extends down and out from the clypeus. The finger-like sensory organs attached to the front of the cephalothorax (palps) are small for a spider this size. On the female the carapace is reddish-brown without white markings except for and the narrow white oblique lines on the face and scattered white scales throughout.

The abdomen is dark brown and is ringed with a white band that does not quite reach the end. The upper (dorsal) side of the abdomen is somewhat iridescent bronze colored and has some small and obscure pale spots. On the female there are usually four pairs of well-defined pale spots.

The legs are short, oriented forward, and adapted for jumping. The first segment of each leg (coxa) is light and yellowish. The third segment (femur) of the front legs is dark reddish-brown. On the other legs, the femur is yellowish just at the base, dark brown otherwise. The remaining segments get progressively lighter approaching the tip. On the female the legs are somewhat lighter.

Female Body Length: ¼″ to 5 ⁄16″ (6 to 8 mm)

Male Body Length: 3 ⁄16″ to ¼″ (5 to 7 mm)

Legspan: 5 ⁄16″ to ⅜″ (8 to 10 mm)

Sources

24, 29, 30, 82.

Conservation Biology of Special Concern Jumping Spiders (Araneae: Salticidae) of Minnesota; Ehmann, William J. Ehmann; 12/2/2002.

Common and widespread

Barnes Prairie, Racine Co., WI

Eris militaris, bronze jumper, Barnes Prairie, Racine Co., WI.

Location: Albany, NY

Location: Barnes Prairie, Racine Co., WI

Location: Barnes Prairie, Racine Co., WI

Location: Woodbury, MN

Location: Woodbury, MN

Location: Woodbury, MN

Location: Barnes Prairie, Racine Co., WI

Location: Barnes Prairie, Racine Co., WI

: Location: Woodbury, MN

: Location: Woodbury, Minnesota

: Location: Woodbury, Minnesota

: Location: Woodbury, Minnesota