Pseudeuophrys erratica

(Walckenaer, 1826)

Black-palped Jumping Spider

Pseudeuophrys erratica is a small to Europe and Asia that has been to the eastern and western United States. Unlike its P. lanigera, which is abundant in and around buildings, P. erratica is uncommon and prefers natural . are active primarily in spring and summer, with females persisting into autumn.

Pseudeuophrys erratica by (c) Bill Keim, some rights reserved (CC BY), uploaded by Bill Keim. Used under a CC-BY license.Pseudeuophrys erratica by (c) Bill Keim, some rights reserved (CC BY). Used under a CC-BY license.Pseudeuophrys erratica by no rights reserved, uploaded by Mirko Schoenitz. Used under a CC0 license.

Pronunciation

How to pronounce Pseudeuophrys erratica: //ˌsjuːd.juˈɒf.rɪs ɛˈræ.tɪ.kə//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

Identification

Males measure 3–4 mm in body length, females up to 5 mm. Distinguished from the very similar Pseudeuophrys lanigera by preference: P. erratica occurs under bark and rocks in forested areas, while P. lanigera is found almost exclusively in or near buildings.

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Habitat

Under bark of trees and under rocks on forest fringes. Occurs in natural wooded environments rather than anthropogenic structures.

Distribution

to Europe and Asia, with records from Turkey, the Caucasus, Russia (Europe to Far East), Iran, Kazakhstan, China, Korea, and Japan. to the United States, with confirmed records from Connecticut, New Jersey, New York, Massachusetts, Oregon, Pennsylvania, Rhode Island, and Vermont.

Seasonality

active in spring and summer; females also present in autumn.

Human Relevance

in the United States represent a non- established in urban and suburban environments in the Northeast and Pacific Northwest. Not known to be of economic or medical significance.

Similar Taxa

  • Pseudeuophrys lanigeraVery similar in appearance but much more abundant; distinguished primarily by preference (buildings vs. forest fringes)

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Sources and further reading