Nais simplex Piguet
Recognition
One or 2 dorsal hair chaetae are present.
The dorsal needle chaetae number 1 or 2 and they are
simple pointed and short (about 60 um).
The ventral chaetae number 2 to 6 with the teeth
not so long and thin as Nais behningi,
the length of the teeth are about equal, unlike Nais alpina.
Most Nais have eyes.
Summary
The length is 4 to 8 mm.
It swims with spiral movements.
Distribution
A widespread species over much of the world.
26 MAY 1996 D.L. Gustafson
AIM home page
dlg@rivers.oscs.montana.edu