Caught in a dip net from a sweep of a tiny stream. Photos were taken while it was under water.
Don't see any intercalary veins.Size 22 or so. 1 male, 1 female Dun.
Male and Female. 2 tails. Minute hind wing. No costal projection. Possibly Acentrella, or Psuedocleoen
Female duns. 2 tails. Small.
Minute hind wings. 5 mm approx. Possibly Acentrella.
No hind wings. Small veins at wing edge not double. 6 or 7 mm ?
2 tails. Thin, minute hind wing showing. Similar to others seen recently. Tan/cream color abdomen.
Baetidae is a family of mayflies with about 900 described species distributed worldwide. These are among the smallest of mayflies, adults rarely exceeding 10 mm in length excluding the two long slender tails and sometimes much smaller, and members of the family are often referred to as small mayflies or small minnow mayflies. Most species have long oval forewings with very few cross veins (see Comstock-Needham system) but the hindwings are usually very small or even...