» Genus Acentrella (Tiny Blue-Winged Olives)
6 species (Acentrella alachua, Acentrella barbarae, Acentrella feropagus, Acentrella lapponica, Acentrella nadineae, Acentrella parvula)
aren't included.
Common Names
This is page 2 of specimens of Acentrella. Visit the main Acentrella page for:
- The behavior and habitat of Acentrella.
Pictures of 7 Mayfly Specimens in the Genus Acentrella:
Male Acentrella turbida (Tiny Blue-Winged Olive) Mayfly Spinner
View 3 PicturesI would not like to have to match this hatch. These are the smallest mayflies I have ever seen. I used to think Caenis was the smallest adult mayfly in the west but these guys are about 4mm long. The male eyes are two toned, brown above and olive below. The abdomen is dark brown interspersed with light brown. The abdomen is clear for the anterior (Anterior: Toward the front of an organism's body. The phrase "anterior to" means "in front of.") 2/3rd and the remainder is white. The tails are twice as long as the insect. There is only one pair of wings. Male Acentrella insignificans (Tiny Blue-Winged Olive) Mayfly Dun
View 11 PicturesThis specimen emerged indoors from nymphs I had collected, then partly molted into a spinner but got stuck along the way. I've included a couple pictures showing some of the spinner colors. It got a bit waterlogged after emerging, so the wings aren't in perfect shape, but it still represents one of two Baetids that were emerging and drawing trout to rise on the Yakima. Based on body size and shape, it is most likely the same species as this nymph.