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Devil Crayfish, Cambarus diogenes: Measurements and Ratios: Form I Male
Number Minimum Maximum Mean
Total length 4 26.8 83.6 65.7
Carapace
Total length 4 36.9 55.4 45.6
Postorbital length 4 31.3 48.3 39.4
Aureola
Length 4 14.4 23.2 18.5
Width 4 0.0 0.0 0.0
Chela
Total length 3 26.1 35.8 32.1
Dactyl length 3 17.5 25.0 21.9
Palm length 3 7.9 10.4 9.1
Palm width 3 12.0 15.6 13.9
Finger gap 3 2.3 3.0 2.5
Antenna
Total length 4 53.3 81.3 63.4
Pleopod
Total length 3 8.6 11.4 10.2
Ratios Number Minimum Maximum Mean
Carapace length / Total length 4 0.53 0.54 0.54
Aureola length / Carapace length 4 0.39 0.42 0.41
Chela length / Carapace length 3 0.71 0.80 0.76
Dactyl length / Chela length 3 0.64 0.73 0.68
Palm width / Chela length 3 0.41 0.46 0.44
Pleopod length / Carapace length 3 0.23 0.25 0.24
