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Animal Phylum Arthropoda (Arthropods)



Pictures Below ↓

This is page 100 of specimens of Arthropoda. Visit the main Arthropoda page for:

  • The behavior and habitat of Arthropoda.
  • 122 underwater pictures of Arthropoda.

Pictures of 1244 Arthropod Specimens:

Specimen Page:1...99100101...126
Female Siphlonurus occidentalis (Gray Drake) Mayfly SpinnerFemale Siphlonurus occidentalis (Gray Drake) Mayfly Spinner View 9 Pictures
Collected July 31, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 16, 2020
Male Strophopteryx fasciata (Mottled Willowfly) Stonefly AdultMale Strophopteryx fasciata (Mottled Willowfly) Stonefly Adult View 4 Pictures
Collected March 18, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006
Maccaffertium (March Browns and Cahills) Mayfly NymphMaccaffertium (March Browns and Cahills) Mayfly Nymph View 5 Pictures
Collected March 29, 2005 from Salmon Creek in New York
Added to Troutnut.com by Troutnut on April 7, 2006
Baetidae (Blue-Winged Olives) Mayfly NymphBaetidae (Blue-Winged Olives) Mayfly Nymph View 3 Pictures
Collected June 5, 2005 from the Long Lake Branch of the White River in Wisconsin
Added to Troutnut.com by Troutnut on May 25, 2006
Male Serratella micheneri (Little Western Dark Hendrickson) Mayfly NymphMale Serratella micheneri (Little Western Dark Hendrickson) Mayfly Nymph View 9 PicturesThis specimen has tarsal claws (Tarsal claw: The claws at the tip of the tarsus, on an insect's "foot.") with 7 denticles (
View Full Size
The denticles on the tarsal claw of this Ephemerella nymph are highlighted in red.
The denticles on the tarsal claw of this Ephemerella nymph are highlighted in red.
Denticle: Small tooth-like projects, often appearing like serrations on the tarsal claws of certain mayfly nymphs.) and tubercles (
A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
Tubercle: Various peculiar little bumps or projections on an insect. Their character is important for the identification of many kinds of insects, such as the nymphs of Ephemerellidae mayflies.) on abdominal segments 4-7 only. It keys to Serratella micheneri, as do some other specimens from the same collection that lacked the dorsal (Dorsal: Top.) stripe.
Collected July 28, 2019 from Mystery Creek #199 in Washington
Added to Troutnut.com by Troutnut on July 30, 2019
Brachycentrus americanus (American Grannom) Caddisfly LarvaBrachycentrus americanus (American Grannom) Caddisfly Larva View 13 PicturesBoth the genus ID (Merritt & Cummins) and species ID (Flint 1984) are pretty confident for this larva, a nice example of a common western caddisfly. It was by far the most abundant insect in my kicknet sample on this trip, and many of the rocks in the fast riffle where I sampled had dozens of these larvae clinging on.
Collected July 6, 2020 from the Dosewallips River in Washington
Added to Troutnut.com by Troutnut on July 12, 2020
Drunella grandis (Western Green Drake) Mayfly NymphDrunella grandis (Western Green Drake) Mayfly Nymph View 10 Pictures
Collected June 16, 2018 from the South Fork Snoqualmie River in Washington
Added to Troutnut.com by Troutnut on June 18, 2018
Female Ephemerella excrucians (Pale Morning Dun) Mayfly DunFemale Ephemerella excrucians (Pale Morning Dun) Mayfly Dun View 5 Pictures
Collected July 31, 2020 from the Henry's Fork of the Snake River in Idaho
Added to Troutnut.com by Troutnut on August 17, 2020
Female Maccaffertium (March Browns and Cahills) Mayfly DunFemale Maccaffertium (March Browns and Cahills) Mayfly Dun View 5 Pictures
Collected June 8, 2005 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on May 26, 2006
Chironomidae (Midges) Midge LarvaChironomidae (Midges) True Fly Larva View 7 PicturesThis relatively large, olive-colored midge larva was very abundant in my samples from this little creek in the mountains.
Collected July 28, 2019 from Mystery Creek #199 in Washington
Added to Troutnut.com by Troutnut on July 30, 2019
Specimen Page:1...99100101...126
Top 10 Fly Hatches
BaetisBaetidaeEphemerellidaeHexagenia limbataChironomidaeEphemerella subvariaHeptageniidaeEphemerellaIsonychiaHydropsychidae
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Top Insect Specimens
Baetisca obesa Mayfly NymphCorydalus Hellgrammite LarvaNeophylax Caddisfly AdultPteronarcys biloba Stonefly NymphHydropsyche aenigma Caddisfly Adult
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