Table 2. Body length (BL), body length with filament (BLF), fin length (FL), body height (S), fin height (H), ratio of body height to fin height (R) of 13 species across 8 genera of South American weakly electric fishes in the Apteronotidae, in order of body height at 50% along fin length. Specimen identification numbers (Harvard Museum of Comparative Zoology) are represented by Sp. ID. Body height, fin height, and their ratio (R) were measured at 25, 50, and 75 percent along the fin length, and the same are tabulated. Note: All lengths are in centimeters, asterisk indicates that the quantity in question was estimated, not measured.
| 25% FL | 50% FL | 75% FL | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Genus | Species | Sp. ID | BL | BLF | FL | S | H | R | S | H | R | S | H | R |
| Adontosternarchus | devanazii | 59522 | 8.30 | 10.00 | 7.20 | 1.10 | 0.60 | 1.83 | 0.86 | 0.65 | 1.32 | 0.45 | 0.50 | 0.90 |
| Adontosternarchus | clarkae | 78151 | 8.30 | 8.30 | 7.40 | 1.20 | 0.60 | 2.00 | 0.92 | 0.63 | 1.47 | 0.98 | 0.43 | 2.27 |
| Adontosternarchus | sachsi | 92914 | 11.70 | 15.80 | 10.50 | 1.40 | 0.62 | 2.26 | 1.12 | 0.68 | 1.65 | 0.66 | 0.50 | 1.32 |
| Apteronotus | leptorhynchus | 48686 | 10.90 | 12.80 | 9.40 | 1.82 | 0.60 | 3.03 | 1.49 | 0.71 | 2.10 | 0.80 | 0.71 | 1.13 |
| Magosternarchus | duccis | 46884 | 11.20 | 13.00 | 10.50 | 1.80 | 0.78 | 2.31 | 1.50 | 0.73 | 2.05 | 0.90 | 0.65 | 1.38 |
| Apteronotus | bonapartii | 78152 | 14.10 | 16.70 | 12.30 | 2.00 | 0.60 | 3.33 | 1.60 | 0.65 | 2.46 | 0.90 | 0.53 | 1.71 |
| Sternarchella | schotti | 59517 | 14.80 | 17.20 | 12.90 | 2.04 | 0.87 | 2.34 | 1.60 | 0.95 | 1.68 | 0.98 | 0.73 | 1.34 |
| Sternarchella | terminalis | 98361 | 14.80 | 15.60 | 12.40 | 2.30 | 1.00 | 2.30 | 1.80 | 1.06 | 1.70 | 1.10 | 0.97 | 1.13 |
| Porotergus | gimbeli | 164198 | 15.70 | 15.70 | 14.50 | 2.10 | 1.06* | 1.98 | 1.85 | 1.05 | 1.76 | 1.25 | 0.83 | 1.51 |
| Apteronotus | albifrons | 78148 | 12.90 | 12.90 | 10.20 | 2.40 | 0.83 | 2.91 | 1.95 | 0.99 | 1.97 | 1.10 | 0.95 | 1.16 |
| Sternarchogiton | porcinum | 164197 | 17.50 | 20.50 | 14.70 | 2.40 | 1.15 | 2.09 | 2.00 | 1.20 | 1.67 | 1.10 | 0.60* | 1.83 |
| Apteronotus | albifrons | 169184 | 16.40 | 19.50 | 13.50 | 3.10 | 0.93 | 3.35 | 2.40 | 1.10 | 2.18 | 1.40 | 1.10 | 1.27 |
| Sternarchorhamphus | muelleri | 59514 | 33.00 | 39.70 | 26.90 | 3.88 | 1.75 | 2.22 | 2.82 | 1.53 | 1.84 | 1.80 | 1.26 | 1.43 |
| Orthosternarchus | tamandua | 98368 | 35.60 | 35.60 | 28.10 | 4.34 | 1.67* | 2.60 | 4.18 | 1.64 | 2.55 | 2.90 | 1.10 | 2.64 |
| Mean | 2.28 | 0.93 | 2.47 | 1.86 | 0.97 | 1.89 | 1.17 | 0.78 | 1.50 | |||||
| Standard Deviation | 0.94 | 0.38 | 0.50 | 0.85 | 0.33 | 0.35 | 0.59 | 0.26 | 0.47 | |||||