Taeniopterygidae Taeniopterygidae is a group of medium sized, dark bodied stoneflies. Emergence times range from winter through spring for most species. Adults are usually recognized by their relatively large mid-tarsal segment which is about the same size as the basal segment. Chloroperlidae Chloroperlidae is a group of small to medium size, mostly pale yellow or green stoneflies. Most species are spring or summer emerging and adults are often collected while sweeping streamside vegetation during their emergence season.
Adults have a reduced anal area to the hindwings.
Dr. Rebecca Surdick, Laboratory of Entomology, Winchester, Virginia is an authority on this group. Kevin Alexander is currently working with Dr. Ken Stewart, University of North Texas , Depar tment of Biology on Suwallia Peltoperlidae Peltoperlidae is a small group of medium sized stoneflies found primarily in the mountains of eastern North America and the west. These stoneflies are somewhat roachlike in appearance and they emerge in spring and summer. Ad ults have only two ocelli and the labial palps are short and are usually not visable from above. Dr. Bill Stark , Mississippi College , Biology Department is an authority on this group.