Flea beetles

Data were collected on the genus of flea beetle Chaetocnema, which contains three species: concinna (Con), heikertingeri (Hei), and heptapotamica (Hep). Measurements were made on the width and angle of the aedeagus of each beetle. The goal of the original study was to form a classification rule to distinguish the three species.

Variables.

1. Width: The maximal width of aedeagus in the forpart (in microns)
2. Angle: The front angle of the aedeagus (1 unit = 7.5 degrees)
3. Species: Species of flea beetle from the genus Chaetocnema

Reference.

Lubischew, A.A. (1962) On the use of discriminant functions in taxonomy. Biometrics, 18, 455-477. Also found in: Hand, D.J., et al. (1994) A Handbook of Small Data Sets, London: Chapman & Hall, 254-255.