» Phylum Arthropoda (Arthropods)
This is page 107 of specimens of Arthropoda. Visit the main Arthropoda page for:
- The behavior and habitat of Arthropoda.
- 122 underwater pictures of Arthropoda.
- 9 streamside pictures of Arthropoda.
Pictures of 1136 Arthropod Specimens:
Paraperla wilsoni (Sallfly) Stonefly Adult
View 1 PicturesThis is another stonefly that lives its nymphal life in the hyporheic zone, flood plain gravels. In this case, the gravels of a small stream, Roy's Creek, that flows into Flathead Lake at the Univ. of Montana Biological Station. Female Pictetiella expansa Stonefly Adult
View 12 PicturesBased on photos, this specimen seems to key out (using Merritt & Cummins 4th Edition) to Pictetiella expansa, but some of the characteristics aren't 100 % clear. However, that species is listed as occurring near Puget Sound and the head markings are similar to (albeit not a perfect match for) those of a male from Colorado in the scientific literature here: https://www.researchgate.net/figure/Head-and-pronotum (Pronotum: The top of the insect prothorax.)-dorsal (Dorsal: Top.)-Pictetiella-expansa-Boulder-Co-Colorado-North-Fork-Middle_fig1_315373449