Johnson's Jumper
( Phidippus johnsoni )


2009-0420-NF050003-ARA00652-Phidippus_johnsoni[1617h55s,F,A,prey]{EXD}-G.jpg

PHOTO COMMENT

IDENTIFICATION
Identification:Phidippus johnsoni
(Peckham & Peckham ,1883 )
Common Name:Johnson's Jumper
Life Stage:(A) adult
Sex:female

PHYLOGENY

Phylum:Arthropoda
Class:Arachnida
Order:Araneae
Family:Salticidae
Subfamily:Subfamily Dendryphantinae
Genus:Phidippus
Taxon Code:ARA00652
ITIS/TSN:886532

LOCATION DETAILS
Location Name
Klamath National Forest, Klamath National Forest, Klamath NF, 96031, Forks of Salmon
County:Siskiyou County
ECI Site#:CANF050000
Open Space Location:Klamath NF

RECOGNITION
Recognition
BugGuide.net: "Mostly black with a red abdomen."
Description
The spider is entirely black, except for the top of its abdomen, which, in males, is entirely bright red. In females the pattern includes black, red and other colors in variable patterning. Mandibles of both sexes are a shiny teal in color.
Body Length
9-15 mm, both sexes.
Diversity
60 Species in the genus Phidippus in North America.
Colors
Base color: black, Color1: red Color2: black

BIOLOGY
Food
Small arthropods, from about 2 mm, but may be up to 1 cm. P. johnsoni feeds on a wide variety of insects, but also prey heavily on other spiders. Cannibalism does occur from time to time when females feed on males.
Habitat
Foliage in woodland, coastal dunes and urban areas from sea level to the tree line.
Nesting Preferences
This species constructs conspicuous tubular silken nests under rocks and wood on the ground and sometimes grape vines. They remain inside these at night and during bad weather. Molting, egg laying and sometimes courtship and mating occur inside these nests.
Importance
This species is reported to be more aggressive than other members of the Salticidae. It has a potent venom and bites can be very painful.
Range
Introduced from New Zealand through grape shipments. It now occurs in gardens and landscaping in California, and elsewhere bounded by the Great Plains, the Pacific Ocean, northern Mexico and southern Canada.
Diversity
60 Species in the genus Phidippus in North America.
Importance
This species is reported to be more aggressive than other members of the Salticidae. It has a potent venom and bites can be very painful.

CREDITS
Photographer
Eddie Dunbar
Insect Sciences Museum of California

References
Species Phidippus johnsoni - Johnson Jumper. (http://bugguide.net/node/view/15152). Accessed March 12, 2016. .
ITIS.
Life History of Phidippus johnsoni (Araneae, Salticidae). Robert R. Jackson. Department of Zoology. University of California, Berkeley. Berkeley, California 94720. (http://www.americanarachnology.org/joa_free/joa_v6_n1/joa_v6_p1.pdf)


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