bronze jumping spider

(Eris militaris)

               
Conservation Status

IUCN Red List

not listed

bronze jumping spider

 

NatureServe

NNR - Unranked

SNR - Unranked

Minnesota

not listed

Occurrence

Common and widespread

Season

 

Habitat/Host

 

Size

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 (8 to 10 mm)

Photo by Alfredo Colon
 
Identification

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 (AMEs) and anterior lateral eyes (ALEs), is curved backward. The AMEs 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 AMEs are about twice as large as the ALEs. The second row of two eyes are the posterior median eyes (PMEs). 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 (PLEs). The PLEs are set far back on the head and are almost exactly as far apart as the ALEs. 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 (pedipalps) 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 irridescent 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.

 
Similar
Species

 

 
Food

 

 
Life Cycle

 

 
Behavior

 

 
Distribution Distribution Map  

Sources: 24, 29, 30.

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

 
Comments

 

 
Taxonomy

Order:

Araneae (spiders)

 

Suborder:

Araneomorphae

 

No Rank:

Entelegynae (eight-eyed spiders)

 

No Rank:

RTA clade

 

No Rank:

Dionycha

 

Family:

Salticidae (jumping spiders)

 

no rank:

Salticoida

 

no rank:

Marpissoida

 

Subfamily:

Dendryphantinae

 
Synonyms

Dendryphantes militaris

Paraphidippus marginatus

Paraphidippus militaris

 
Common
Names

bronze jumper

bronze jumping spider

bronze lake jumper

 

 

 

 

 

 

Glossary

Carapace

The hard, upper (dorsal), shell-like covering (exoskeleton) of the body or at least the thorax of many arthropods and of turtles and tortoises. In crustaceans, it covers the cephalothorax.

 

Cephalothorax

The front part of a spider’s body, composed of the head region and the thoracic area fused together. Eyes, legs, and antennae are attached to this part.

 

Clypeus

On insects, a hardened plate on the face above the upper lip (labrum).

 

Femur

On insects and arachnids, the third, largest, most robust segment of the leg, coming immediately before the tibia. On humans, the thigh bone.

 

Palp

Short for pedipalp. A segmented, finger-like process of an arthropod; one is attached to each maxilla and two are attached to the labium. They function as sense organs in spiders and weapons in scorpions. Plural: palpi.

 

 

       
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Alfredo Colon
       
  bronze jumping spider   bronze jumping spider
       
  bronze jumping spider   bronze jumping spider
       
  bronze jumping spider   bronze jumping spider
       
  bronze jumping spider   bronze jumping spider
       
  bronze jumping spider   bronze jumping spider
       
  bronze jumping spider   bronze jumping spider
       
  bronze jumping spider    
       
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Camera

     
Slideshows
   
  jumping spider (Eris militaris/rufa) (O)
Bill Keim
 
  jumping spider (Eris militaris/rufa) (O)  

 

slideshow

       
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Other Videos
 
  Eris militaris (Hentz, 1845) Middlesex Co., MA ♂ ♀
Dick Walton
 
   
 
About

Published on Nov 25, 2010

For narrative account, additional data, and usage see:

class="tableNote">http://www.rkwalton.com/salticids/Eris_militaris.php

   
       
  Bronze Jumping Spider (Salticidae: Eris militaris) Male on Leaf
Carl Barrentine
 
   
 
About

Published on Jun 7, 2011

A nice long look at a handsome salticid spider. Note the ants on the plant's stem in the background. Photographed at the Turtle River State Park, North Dakota (06 June 2011).

   
       
  Eris militaris?- Bronze Jumper
TheTyro
 
   
 
About

Published on May 7, 2010

I think she's a mature adult. Found her hiding inside a tulip. :D She's a cute little thing.

Unfortunately I injured her while filming and she ended up losing a leg. She's fine though. I included footage where you can see a drop of her blood-hemocyanin-it's got a goldish coloration I think because it was in the sun-on her leg.

   
       
  Bronze Jumper (Salticidae: Eris militaris?) Male
Carl Barrentine
 
   
 
About

Published on May 13, 2012

Photographed at the Turtle River State Park, North Dakota (13 May 2012).

   
       

 

Camcorder

         
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Alfredo Colon
8/27 to 8/29/2018

Location: Woodbury, Minnesota

bronze jumping spider


     
     
 
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Created: 7/25/2019

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