Johnson's Jumper
( Phidippus johnsoni )


2014-0420-EB550147-ARA00652-Phidippus_johnsoni[1059h36s,F,A,plant-leaf]{EXD}-G.jpg

PHOTO COMMENT
This spider was introduced from New Zealand through grape shipments. It now occurs in our gardens and landscaping. 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. The spider has a potent venom and bites can be very painful.

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

PHYLOGENY

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

LOCATION DETAILS
Location Name
ECI Site#:CAEB550000

RECOGNITION
Recognition
BugGuide.net: "Mostly black with a red abdomen."
Description
Mostly black with a red abdomen. The male's abdomen is entirely red, whereas the female's abdomen has a black mark down the center.
Body Length
9-14 mm.
Colors
Base color: black, Color1: red Color2: black

BIOLOGY
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.
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.
Importance
Importance: Not harmful to humans, although like all spiders it will inflict a painful bite if provoked, and this species is reported to be more aggressive than other jumpers.
Range
Range includes California, and elsewhere bounded by the Great Plains, the Pacific Ocean, northern Mexico and southern Canada.
Importance
Importance: Not harmful to humans, although like all spiders it will inflict a painful bite if provoked, and this species is reported to be more aggressive than other jumpers.

CREDITS
Photographer
Eddie Dunbar
Insect Sciences Museum of California

References
BugGuide .
ITIS ITIS TSN#.
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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