• Long, telescopic respiratory siphon on terminal segment
• Abdominal segments with multiple transverse ridges or rows of small setae or setiferous (setae-bearing) papillae (soft projections)
• First 3 abdominal segments with a pair of ventral prolegs each bearing a single, slender, curved claw

Merritt, R W., K W. Cummins, and M B. Berg. An Introduction to the Aquatic Insects of North America. Dubuque, Iowa: Kendall/Hunt Company, 2008