Platycryptus californicus

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Current valid name

Platycryptus californicus (G. & E. Peckham) (family Salticidae)

Recognition and diagnostic features

Diurnal jumping spider, leaf-like pattern on dorsal surface of abdomen.

Spider

Body lengths when mature: male: 6.2 - 7.1 mm, female: 9.4 - 10.6 mm

Immatures resemble miniature adults.

Egg sac

Description: retreat-like egg sac, female stays inside and guards eggs, 11.2 ± 2.1 mm wide, 21.6 ± 6.2 mm long

Number of eggs per sac: 12.7 ± 2.1

Size of egg: 1.13 ± 0.038 mm

Distribution

In California: throughout most of the state

Elsewhere: western United States, British Columbia, Central America

Native to North America

This species has not been transported or become established outside of its range.

Biology

Found on grape vine bark.

Status in table grapes

Level of Incidence: uncommon

Level of Concern in New Zealand: WPNZ (May 2010) nr, BORIC (Dec 2011) nr (not listed), MAF-BPRA (2002) nr (coding definition)

Level of Concern in Australia: WPAU (2006) nr (coding definition)

Level of Medical importance: none, but probably large enough to inflict bite

Common name

None for species, jumping spiders for family

Taxonomic history

Transferred from Metacyrba by Hill (1979).

Commonly encountered synonyms

Possibly Metacyrba californica in older literature.

Selected references

Barnes, R. D. 1958. North American jumping spiders of the subfamily Marpissinae (Araneae, Salticidae). Amer. Mus. Novit. #1867, 50 pp.

Hill, D. E. 1979. The scales of salticid spiders. Zool. J. Linn. Soc. 61: 193-218.