Tuesday, April 10, 2012
Plauditus dubius: A New Species of Small Minnow Mayfly
Above, a photo of the small minnow mayfly nymph that I found at the Doyles River yesterday. It is not Acentrella turbida, and it is not Acentrella nadineae. It's, for me, a new species: Plauditus dubius, and this is a female.
I'll try to get good microscope photos of this so I can make the full case. In the meantime -- two of the features we use for identification are visible in this photo: 1) there is a narrow median band on the caudal filaments (tails), and 2) tergites 2 and 6 have a single, median spot while the other tergites have paired submedian spots. (Please click on the photo below to enlarge it.)