Little Yellow Stoneflies

Mayflies Caddisflies Stoneflies

Scientific Names

Match	Scientific Name
	Isoperla quinquepunctata
	Alloperla caudata
	Sweltsa coloradensis
	Suwallia pallidula

Like most common names, "Little Yellow Stonefly" can refer to more than one taxon. They're previewed below, along with 2 specimens. For more detail click through to the scientific names.

Stonefly Species Isoperla quinquepunctata

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 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.

Entoman

Collected March 21, 2011 from in
Added to Troutnut.com by on November 1, 2011

Stonefly Species Alloperla caudata

Stonefly Species Sweltsa coloradensis

Stonefly Species Suwallia pallidula

Suwallia pallidula (Little Yellow Stonefly) Stonefly Adult View 2 Pictures

Collected July 1, 2011 from in
Added to Troutnut.com by on July 1, 2011