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Emerald Jumper

Paraphidippus aurantius female

Paraphidippus aurantius female

(Paraphidippus aurantius)

This colorful spider had not been recorded previously in Pennsylvania. However, it has been identified in Delaware, Maryland, Virginia, and ten other states, more prominently in the eastern states. This particular record is from State College, Pennsylvania. P. aurantius probably ranges from Delaware to Nebraska and south to Florida and Arizona.

Description
Paraphidippus aurantius is quite variable in appearance, owing somewhat to the iridescent scales that appear as different colors depending on the observer’s point of view. Additionally, the color of some of the markings can range from a light golden brown to white.

The female has a band of light-colored scales extending from the eyes around the lateral margins of the cephalothorax and also around the sides of the abdomen. The dorsal surfaces of both the cephalothorax and abdomen are a light reddish-brown with iridescent green scales. The eyes are surrounded by a patch of black scales. The abdomen has four pair of white spots—the third pair elongated laterally—and orange spots midway on the sides of the abdomen. The legs are brown, with the first pair having black bands. Males are much darker, which makes the abdominal spots stand out while the orange spots are harder to see. Females are 8 to 12 millimeters long, while males 7 are 10 millimeters in length.

Life History/Behavior
Little is known of this spider’s life history. It is found in both rural and suburban wooded locations and most often observed in the fall when crawling on the exterior or interior of buildings. It shelters within a silken retreat that is created in a folded leaf.

Medical Importance
As with other jumping spiders, this species is most likely not medically important.

Authored by: Steve Jacobs, Sr. Extension Associate
February 2015

References
Baerg, W. J. 1936. The Black Widow. Ark. Agr. Expt. Sta. Bul. 325. 34 pp.

Baerg, W. J. 1959. The Black Widow and Five Other Venomous Spiders in the United States. Ark. Agr. Expt. Sta. Bul. 608. 43 pp.

Bradley, R. A. 2013. Common Spiders of North America. University of California Press. 271 pp.

Breene, R. G., et al. 2003. Common Names of Arachnids. 5th ed. The American Arachnological Society Committee on Common Names of Arachnids. 42 pp.

Gertsch, W. J., and F. Ennik. 1983. “The spider genus Loxosceles in North America, Central America, and the West Indies (Araneae, Loxoscelidae).” Bul Amer Mus. Nat. Hist. 175: 24–360.

Herms, W. B., and M. T. James. 1961. Medical Entomology. 5th ed. The MacMillan Company, New York. 616 pp.

Howell, W. M., and R. L. Jenkins. 2004. Spiders of the Eastern United States: A Photographic Guide. Pearson Education. 363 pp.

Isbister, G. K., and M. R. Gray. 2003. “Effects of envenoming by combfooted spiders of the genera Steatoda and Achaearanea (Family Theridiidae: Araneae) in Australia.” J. Toxicol. Clin. Toxicol. 41: 809–819.

Kaston, B. J. 1948. “Spiders of Connecticut.” Conn. State Geol. Nat. Hist. Survey. Bull. 70. 874 pp.

Kaston, B. J. 1972. How to Know the Spiders. 3rd ed. Wm. C. Brown Company, Dubuque, Iowa. 272 pp.

Levi, H. W. 1959. “The Spider Genus Latrodectus (Araneae, Theridiidae).” Trans. Amer. Microscopical Soc. 78(1): 7–43.

Long, D., R. Snetsinger, and K. F. Helm. 1995. “Localized Pruritic Rash Due to Recurrent Spider Bites.” J. Geriatr. Dermatol. 3(6): 186–190.

McKeown, N., R. S. Vetter, and R. G. Hendrickson. 2014. “Verified spider bites in Oregon (USA) with the intent to assess hobo spider venom toxicity.” Toxicon 84: 51–55.

Ubick, D., P. Paquin, P. E. Cushing, and V. Roth, eds. 2005. Spiders of North America: An Identification Manual. American Arachnological Society. 377 pp.

Vetter, R. S., and P. Kirk Visscher. 1998. “Bites and Stings of Medically Important Venomous Arthropods.” International. J. Derm. 37: 481–496.

Vetter, R. S., et al. 2006. “Verified Bites By Yellow Sac Spiders (Genus Cheiracanthium) in the United States and Australia: Where Is the Necrosis?” Amer. J. Trop. Med. Hyg. 74(6): 1,043–1,048.

Vetter, R. S., and G.K. Isbister. 2008. “Medical aspects of spider bites.” Annu. Rev. Entomol. 53: 409–429.

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