Mayfly Species Acentrella turbida (Tiny Blue-Winged Olives)

Abdominal tergites 2-6 of male imago wholly dark polished brown.

Turbinate eyes brown in dried specimen. Thorax and femora clear polished brown, darker than in P. turbidum (now a synonym of Acentrella turbida). Femora likewise polished brown. Wings hyaline, venation pale. Abdominal tergites 2-10 clear polished brown; sternites pale yellowish. Tails pale whitish, very slightly brownish at the joinings. Genitalia as in fig. 168.

The much darker brown of thorax and abdominal tergites, as well as the dark markings at the tail joinings, distinguishes this species from turbidum.

Described as P. turbidum

Body length 4 mm, wing length 4 mm

Abdominal tergites 2-6 of male imago entirely dark olivaceous brown.

Turbinate eyes are large, circular; considerably larger than in P. dubium (now a synonym of Plauditus dubius); reddish brown in living insect, deep red-brown to blackish in dried specimen. Thorax shining blackish; pleural sutures below the wings tinged with ruddy. All femora dark smoky brown; tibiae and tarsi pale yellowish white, those of the fore legs tinged with smoky. Wings hyaline. Abdominal tergites 2-10 entirely dark olivaceous brown; sternites pale yellowish white. Tails and forceps white.

This species is very similar to the eastern species P. carolina (now a synonym of Acentrella turbida), but not so deep a brown in color of body.