Identification, Images, & Information
For Insects, Spiders & Their Kin
For the United States & Canada

Species Tetragnatha laboriosa - Silver Longjawed Orbweaver

Tetragnatha laboriosa Hentz, 1850 - male - Tetragnatha laboriosa - male Juvenile long jawed spider - Tetragnatha laboriosa - female Spider - Tetragnatha laboriosa Spider - Tetragnatha laboriosa Lateral view, habitus - Tetragnatha laboriosa - male Tetragnatha laboriosa--voucher image - Tetragnatha laboriosa - male Silver Longjawed Orbweaver - Tetragnatha laboriosa - female Tetragnatha laboriosa - male
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynae)
Family Tetragnathidae (Long-jawed Orb Weavers)
Genus Tetragnatha (Longjawed Orbweavers)
Species laboriosa (Silver Longjawed Orbweaver)
Synonyms and other taxonomic changes
Explanation of Names
Tetragnatha laboriosa Hentz, 1850
Female: Length 5.2-9.0 mm(1)
Male: Length 3.8-7.4 mm(1)
Not diagnostic, but can separate some species:(1)
Lateral eyes as far apart as medians.


All across the US and Canada
Often found in fields, but lives in many habitats.
Laboriosa has silvery patches on abdomen and the lateral eyes are distinctly separated from each other. The carapace marks are straight, diverging lines. Actually, the carapace pattern (which Levi doesn't mention) is just about the most reliable of all.
~ R. Crawford
Print References
Levi, H.W. 1981. The American orb-weaver genera Dolichognatha and Tetragnatha north of Mexico (Araneae: Araneidae, Tetragnathinae). Bulletin of the Museum of Comparative Zoology, 149(5): 271-318. (Species Description)(1)