Ephemeroptera: Caenidae & Tricorythidae (Crawling Mayflies)

• 3 pairs of jointed legs, each with a single claw; 3 tail-like filament with dense fringe on inside edges.
• 1 pair of wingpads apparent.
• Gills hidden under platelike or triangular gill covers on abdominal segment 2. (Caution: if gill covers present on segments 3 or 4, then nymph should be identified as "other mayflies.")

Length: 2 mm to 10 mm

crawling_mayflies	crawling_mayfly	trian

Crawling Mayfly	Updated: Apr 06, 2007.	Peter Chen.