7443246 68% CCGTCC 14.5% 6.9% Pseudoxiphophorus (11026293) jonesii 3611982 31% GTAGAG 85.1% 76.6% Priapella (11706270) compressa Table S4. Sword index (sword length/standard length) compiled from literature. Unsworded species were assigned a sword length value of 0.275, corresponding to the approximate relative caudal fin length. Species Sword Source index 0.650 () Xiphophorus alvarezi 0.350 () X. andersi 0.275 () X. birchmanni 0.564 () X. clemenciae 0.300 () X. continens 0.370 () X. cortezi 0.275 N/A X. couchianus 0.275 N/A X. evelynae 0.275 N/A X. gordoni 0.641 (; ) X. hellerii 0.275 N/A X. maculatus 0.370 () X. malinche 0.700 () X. mayae 0.275 N/A X. meyeri 0.275 N/A X. milleri 1.030 () X. montezumae 0.517 () X. monticolus 0.400 () X. multilineatus 0.480 () X. nezahualcoyotl 0.370 () X. nigrensis 0.300 () X. pygmaeus 0.600 () X. signum 0.275 N/A X. variatus 0.300 () X. xiphidium 0.275 N/A Pseudoxiphophorus jonesii 0.275 N/A Priapella compressa
Pseudoxiphophorus jonesii 7443246 (11026293) 68% CCGTCC 14.5% 6.9% Priapella compressa 3611982 (11706270) 31% GTAGAG 85.1% 76.6% Table S4. Sword index (sword length/standard length) compiled from literature. Unsworded species were assigned a sword length value of 0.275, corresponding to the approximate relative caudal fin length. Species Sword index Source Xiphophorus alvarezi 0.650 () X. andersi 0.350 () X. birchmanni 0.275 () X. clemenciae 0.564 () X. continens 0.300 () X. cortezi 0.370 () X. couchianus 0.275 N/A X. evelynae 0.275 N/A X. gordoni 0.275 N/A X. hellerii 0.641 (; ) X. maculatus 0.275 N/A X. malinche 0.370 () X. mayae 0.700 () X. meyeri 0.275 N/A X. milleri 0.275 N/A X. montezumae 1.030 () X. monticolus 0.517 () X. multilineatus 0.400 () X. nezahualcoyotl 0.480 () X. nigrensis 0.370 () X. pygmaeus 0.300 () X. signum 0.600 () X. variatus 0.275 N/A X. xiphidium 0.300 () Pseudoxiphophorus jonesii 0.275 N/A Priapella compressa 0.275 N/A