This species is often the most common Perlodidae or Little Yellow Stone In Northern California, especially in mid-elevation rivers and streams. Where & WhenRegion: West
» Species quinquepunctata (Little Yellow Stonefly)
Time Of Year (?): Early spring through late Summer depending on elevation
Preferred Waters: Riffles and runs over cobble
Pictures of 2 Little Yellow Stonefly Specimens:
Isoperla quinquepunctata (Little Yellow Stonefly) Little Yellow Stonefly Nymph
View 2 PicturesSize - (excluding tails) - 10 mm
Status at time of photo - preserved but no discernible color change as specimen was captured only a few days earlier.
Key characters - unique pattern on dorsal (Dorsal: Top.) head and thorax (Thorax: The thorax is the middle part of an insect's body, in between the abdomen and the head, and to which the legs and wings are attached.); dark medial (Medial: Toward the middle of the body.) terga (Tergum: the dorsal part of an abdominal segment or segments (terga). Also used to describe the entire abdominal dorsum or the thoracic dorsal segments of Odonata.) stripe between two paler stripes
This species is very common in west slope north Sierra watersheds. Richard W. Baumann & Boris C. Kondratieff did a study on the same section and at the same time of year (APRIL 25-29, 2010) where this specimen was taken. No other species of Isoperla were reported from this location and quinquepunctata was very abundant. Their hatches can be very heavy some Springs.
Your Thoughts On Isoperla quinquepunctata:
You must log in
at the top of the page to post. If you haven't registered yet, it's this easy: