Synonyms and other taxonomic changes
Species here were all previously in the genus Tegenaria.
Recognition of Eratigena atrica
as three separate species (E. atrica
, E. duellica
, and E. saeva
) restored via Oxford & Bolzern, 2018.(1)
Explanation of Names
is an anagram of the genus Tegenaria
(Bolzern, Burckhardt, & Hänggi, 2013)(2)
3 species in BugGuide's range (North America north of Mexico).(3)
The US/Canada Eratigena species (agrestis, atrica, and duellica) can be separated from most other funnel weaver genera in their range by the absence of banded patterning on the legs, though it should be noted that certain Tegenaria domestica can have leg banding faint enough to be barely visible.
E. atrica and E. duellica are largely similar in appearance, but at this time there are no known range overlaps in North America.
In the coastal regions of the Pacific Northwest where E. duellica and E. agrestis can both be found, separating the two visually can be a challenge.
generally has a darker color palette with very dark background coloration on the chevron patterning over the heart.
The legs are longer than those of E. agrestis
, especially in males.
generally has a lighter color palette with mottled/sandy background coloration on the abdominal chevron patterning.
: Europe to Central Asia. Introduced to USA, Canada(3)
- CO, ID, MT, OR, UT, WA, WY, AB, BC, ON (Rouge River area of Pickering, Ontario is a recent accidental introduction)(4)(5)
: Europe. Introduced to Canada, USA(3)
- BugGuide has photos of E. atrica
from NS and ON.
- Canada, USA, Europe(3)
- main population located in BC, OR, & WA.(4)
Also collected from isolated populations in AB, SK, QC, NS, NF.(5)
- Access needed to cited material to sort out which species this line refers to now that the synonymy between E. atrica, duellica, and saeva
has been undone.
is the type species.(3)
and E. saeva
can hybridize with one another.(1)
See individual info pages for each species.
World Spider Catalog (2018). World Spider Catalog. Natural History Museum Bern, online at http://wsc.nmbe.ch, version 19.0, accessed on 04/17/2018.