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:
Paraleptophlebia (Blue Quills) Mayfly Nymph
View 4 PicturesThis one is missing several gills due to capture damage.
View 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 Nymph
View 2 PicturesIt has the segment 4 gill and abdominal segment 9 is longer than segment 8. I couldn't see abdominal tubercles (
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.).
View 2 PicturesIt has the segment 4 gill and abdominal segment 9 is longer than segment 8. I couldn't see abdominal tubercles (
View Full SizeA few (not all) of the abdominal tubercles on this Ephemerella needhami nymph are circled. They are especially large in this species.
Region: Upper Midwest
Collected Mar 10, 2004
Added Jan 19, 2006
Ephemerella invaria (Sulphur) Mayfly Nymph
View 2 Pictures
View 2 PicturesRegion: Upper Midwest
Collected Jan 13, 2004
Added Jan 25, 2006
Ephemerella invaria (Sulphur) Mayfly Nymph
View 4 PicturesI looked at this small Ephemerella nymph very carefully under a microscope. It as no abdominal tubercles (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 (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.
View 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.
Region: Upper Midwest
Collected Feb 7, 2004
Added Jan 25, 2006
Eurylophella (Chocolate Duns) Mayfly Nymph
View 3 PicturesLooking at this specimen under a microscope revealed prominent sharp abdominal tubercles (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.
View 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.
Region: Upper Midwest
Collected Feb 7, 2004
Added Jan 25, 2006
Ephemerellidae (Hendricksons, Sulphurs, PMDs, BWOs) Mayfly Nymph
View 3 Pictures
View 3 PicturesRegion: Upper Midwest
Collected Jan 13, 2004
Added Jan 25, 2006
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