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Genus Dolomedes - Fishing Spiders

Very large spider - Dolomedes tenebrosus Long Legged Spider - Dolomedes Fishing Spider ??? - Dolomedes triton Dolomedes vittatus - female Dolomedes tenebrosus? - Dolomedes tenebrosus Dolomedes tenebrosus Large scriptus or tenebrosus? - Dolomedes scriptus - female Dolomedes scriptus? - Dolomedes
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Chelicerata (Chelicerates)
Class Arachnida (Arachnids)
Order Araneae (Spiders)
Infraorder Araneomorphae (True Spiders)
No Taxon (Entelegynes )
Family Pisauridae (Nursery Web Spiders)
Genus Dolomedes (Fishing Spiders)
Numbers
8 species in BugGuide's range.
Identification
Arrangement of eyes, apparently typical of family:


The transverse suture of the lorum is distinct and v-notched in th.is genus. This feature sets it apart from the other two genera of this family.

Overview of the typical patterns & coloring of Dolomedes species:

D. albineus - seems to be extra hairy, look for the white band along the 'face', may also have a white carapace.


D. gertschi - need more info.


D. okefinokensis - the adult females are the largest of the genus, need more info.


D. scriptus - look for White 'W' mark


D. striatus - looks somewhat similar to P. brevipes, need more info


D. tenebrosus - this species is the one found most often away from water.


D. triton - Pretty distinct spots on abdomen and carapace pattern is distinct.


D. vittatus - Look for the very dark mark on the carapace.
Range
Widespread primarily in the east.
Also restricted locally in the west.

Exact distribution within these countries will be added when time permits.

Ranges from Carico, 1973(1)
albineus - Southeastern US
gertschi - AZ, NM
okefinokensis - FL, GA
scriptus - Across most of the eastern US & southeastern Canada.
striatus - Northeastern US & southeastern Canada
tenebrosus - Across most of the eastern US & southeastern Canada.
triton - Widespread in the east, but also in the west & all of Canada.
vittatus - Across most of the eastern US & southeastern Canada.
Habitat
Aquatic and moderately moist forest habitats.
Food
Mostly aquatic insects. They have also been known to occasionally catch small fish, hence the common name "Fishing Spider".
Print References
Spiders of North America: an identification manual, by Ubick et al.(2)
Works Cited
1.The Neartic Species of the Genus Dolomedes (Araneae: Pisauridae)
James Edwin Carico. 1973. Bulletin of the Museum of Comparative Zoology, Harvard University, Vol. 144, No. 7 Cambridge, Mass., March 13.
2.Spiders of North America: An Identification Manual
D. Ubick, P. Paquin, P.E. Cushing and V. Roth (eds). 2005. American Arachnological Society.