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Arthropod Class Insecta (Insects)

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This is page 73 of specimens of Insecta. Visit the main Insecta page for:

  • The behavior and habitat of Insecta.
  • 112 underwater pictures of Insecta.
  • 64 streamside pictures of Insecta.

720 Insect Specimens:

Specimen Page:1...70717273
Paraleptophlebia (Blue Quills) Mayfly NymphParaleptophlebia (Blue Quills) Mayfly NymphView 4 PicturesThis one is missing several gills due to capture damage.
Region: Upper Midwest
Collected Feb 5, 2004
Added Jan 25, 2006
Eurylophella (Chocolate Duns) Mayfly NymphEurylophella (Chocolate Duns) Mayfly NymphView 2 PicturesIt has the segment 4 gill and abdominal segment 9 is longer than segment 8. I couldn't see abdominal 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.
)
, but they may not yet be developed in such an early instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.).
Region: Upper Midwest
Collected Mar 10, 2004
Added Jan 19, 2006
Ephemerella invaria (Sulphur) Mayfly NymphEphemerella invaria (Sulphur) Mayfly NymphView 2 Pictures
Region: Upper Midwest
Collected Jan 13, 2004
Added Jan 25, 2006
Ephemerella invaria (Sulphur) Mayfly NymphEphemerella invaria (Sulphur) Mayfly NymphView 4 PicturesI looked at this small Ephemerella nymph very carefully under a microscope. It as no abdominal 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.
)
and 1-banded tibiae (
The tibia of this Isonychia bicolor mayfly spinner is highlighted in red.
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.
)
. I think just a very early instar (Instar: Many invertebrates molt through dozens of progressively larger and better-developed stages as they grow. Each of these stages is known as an instar. Hard-bodied nymphs typically molt through more instars than soft-bodied larvae.) invaria nymph.
Region: Upper Midwest
Collected Feb 7, 2004
Added Jan 25, 2006
Eurylophella (Chocolate Duns) Mayfly NymphEurylophella (Chocolate Duns) Mayfly NymphView 3 PicturesLooking at this specimen under a microscope revealed prominent sharp abdominal 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.
)
. Also, abdominal segment 9 is distinctly longer than abdominal segment 8, meaning this is definitely a Eurylophella nymph.
Region: Upper Midwest
Collected Feb 7, 2004
Added Jan 25, 2006
Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly NymphEphemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly NymphView 3 Pictures
Region: Upper Midwest
Collected Jan 13, 2004
Added Jan 25, 2006
Specimen Page:1...70717273
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