Datafile Name: Flea Beetles
Datafile Subjects:
Biology
Story Names:
Flea Beetles
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.
Authorization: Contact Authors
Description: 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.
Number of cases: 74
Variable Names:
- Width: The maximal width of aedeagus in the forpart (in microns)
- Angle: The front angle of the aedeagus (1 unit = 7.5 degrees)
- Species: Species of flea beetle from the genus Chaetocnema
The Data:
Width Angle Species
150 15 Con
147 13 Con
144 14 Con
144 16 Con
153 13 Con
140 15 Con
151 14 Con
143 14 Con
144 14 Con
142 15 Con
141 13 Con
150 15 Con
148 13 Con
154 15 Con
147 14 Con
137 14 Con
134 15 Con
157 14 Con
149 13 Con
147 13 Con
148 14 Con
120 14 Hei
123 16 Hei
130 14 Hei
131 16 Hei
116 16 Hei
122 15 Hei
127 15 Hei
132 16 Hei
125 14 Hei
119 13 Hei
122 13 Hei
120 15 Hei
119 14 Hei
123 15 Hei
125 15 Hei
125 14 Hei
129 14 Hei
130 13 Hei
129 13 Hei
122 12 Hei
129 15 Hei
124 15 Hei
120 13 Hei
119 16 Hei
119 14 Hei
133 13 Hei
121 15 Hei
128 14 Hei
129 14 Hei
124 13 Hei
129 14 Hei
145 8 Hep
140 11 Hep
140 11 Hep
131 10 Hep
139 11 Hep
139 10 Hep
136 12 Hep
129 11 Hep
140 10 Hep
137 9 Hep
141 11 Hep
138 9 Hep
143 9 Hep
142 11 Hep
144 10 Hep
138 10 Hep
140 10 Hep
130 9 Hep
137 11 Hep
137 10 Hep
136 9 Hep
140 10 Hep