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Animal Phylum Arthropoda (Arthropods)

Mayflies

Caddisflies

Stoneflies

Taxonomic Navigation -?-

Kingdom Animalia (Animals)

» Phylum Arthropoda (Arthropods)

Class in Arthropoda
ArachnidaMites and Spiders	0	1
CollembolaSpringtails	0	0
Crustacea-MalacostracaCrayfish, Scuds, and Sowbugs	0	10
Crustacea-Maxillopoda	0	0
InsectaInsects	0	114

Common Name

Match	Common Name
	Arthropods

Pictures Below ↓

This is page 41 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...404142...126

Leptophlebia cupida (Borcher Drake) Mayfly Nymph

View 5 Pictures

Collected February 5, 2004 from the Namekagon River in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Male Epeorus vitreus (Sulphur) Mayfly Spinner

View 4 Pictures

Collected May 26, 2007 from Penn's Creek in Pennsylvania
Added to Troutnut.com by Troutnut on June 4, 2007

Ephemerella subvaria (Hendrickson) Mayfly Nymph

View 3 Pictures

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Ephemerella invaria (Sulphur Dun) Mayfly Nymph

View 4 PicturesI looked at this nymph closely under a microscope to ascertain some key features I was wondering about in previous photographs of similar specimens. It definitely does have the fan-tail characteristic of the Ephemerella genus. It also has strongly 2-banded tibiae (

The tibia of this Isonychia bicolor mayfly spinner is highlighted in red.

Tibia: A middle segments in the leg of an insect, located between the femur and the tarsus.) and definite tiny abdominal tubercles (

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.).

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetidae (Blue-Winged Olives) Mayfly Nymph

View 3 PicturesThis Baetid nymph has no tracheation on its gills, no distinct bands on its tails, and a rounded, oval 7th gill. Abdominal segments 5, 9, and 10 are pale.

Collected February 5, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetisca laurentina (Armored Mayfly) Mayfly Nymph

View 3 Pictures

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Capniidae (Snowflies) Stonefly Nymph

View 3 Pictures

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Epeorus vitreus (Sulphur) Mayfly Nymph

View 3 PicturesKey features I discerned with a microscope include that the femoral flange is sharp, and the first gill is not extended.

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Notonectidae (Backswimmers) Backswimmer Adult

Notonectidae (Backswimmers) True Bug Adult

View 4 Pictures

Collected May 18, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Baetidae (Blue-Winged Olives) Mayfly Nymph

View 3 PicturesThis specimen has indistinct gill veinlets (Veinlet: Short insect wing veins connecting the major longitudinal veins to the wing margin.), a rounded seventh gill, and no bands on the tails.

Collected February 7, 2004 from unknown in Wisconsin
Added to Troutnut.com by Troutnut on January 25, 2006

Specimen Page:1...404142...126

Jargon Defined:

Nymph: The juvenile, underwater stages of mayflies, stoneflies, dragonflies, and damselflies and other aquatic insects whose juvenile stages are covered by hard exoskeletons. The word can also refer to the fishing flies which imitate these creatures, in which case it is used as a blanket term for flies imitating any underwater stage of an invertebrate (except for crayfish and leeches).

The tibia of this Isonychia bicolor mayfly spinner is highlighted in red.

Tibiae: A middle segments in the leg of an insect, located between the femur and the tarsus.

A few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.

Tubercles: 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.

Veinlets: Short insect wing veins connecting the major longitudinal veins to the wing margin.