Table 3. Counts from 30 specimens of the 3 morphotypes of Astyanax gymnodontus, with the arbitrary difference in the premaxillary teeth of the outer row shown in bold.
| Morphotypes |
“ Psalidodon gymnodontus ” |
“ Psalidodon sp.” |
“ Astyanax sp. F ” |
| Counts |
Low |
High |
Mean |
Low |
High |
Mean |
Low |
High |
Mean |
| Dentary teeth cusp |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
| Premaxillary teeth cusps of inner row |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
5.00 |
| Premaxillary teeth cusps of outer row |
-- |
-- |
-- |
3.00 |
3.00 |
3.00 |
3.00 |
3.00 |
3.00 |
| Larger dentary teeth |
5.00 |
7.00 |
5.90 |
5.00 |
6.00 |
5.37 |
5.00 |
6.00 |
5.60 |
| Smaller dentary teeth |
5.00 |
7.00 |
6.00 |
4.00 |
7.00 |
5.63 |
4.00 |
7.00 |
5.70 |
| Maxillary teeth |
1.00 |
4.00 |
2.70 |
1.00 |
4.00 |
2.57 |
2.00 |
4.00 |
2.90 |
| Premaxillary teeth of inner row |
5.00 |
7.00 |
6.07 |
5.00 |
6.00 |
5.27 |
4.00 |
6.00 |
5.07 |
| Premaxillary teeth of outer row |
0.00 |
0.00 |
0.00 |
1.00 |
2.00 |
1.67 |
3.00 |
4.00 |
3.60 |
| Circumpeduncular scales |
13.00 |
16.00 |
14.70 |
13.00 |
16.00 |
14.33 |
14.00 |
15.00 |
14.30 |
| Perforated lateral-line scales |
37.00 |
41.00 |
38.77 |
37.00 |
41.00 |
39.13 |
38.00 |
40.00 |
38.93 |
| Scales between dorsal and adipose fins |
11.00 |
14.00 |
12.57 |
10.00 |
15.00 |
12.07 |
11.00 |
13.00 |
11.93 |
| Post-adipose-fin scales |
6.00 |
9.00 |
6.90 |
6.00 |
8.00 |
6.70 |
7.00 |
9.00 |
7.60 |
| Post-anus scales |
1.00 |
2.00 |
1.80 |
1.00 |
2.00 |
1.53 |
1.00 |
2.00 |
1.50 |
| Pre-anus scales |
23.00 |
25.00 |
24.03 |
23.00 |
25.00 |
24.10 |
23.00 |
25.00 |
24.47 |
| Predorsal scales |
12.00 |
15.00 |
13.60 |
12.00 |
15.00 |
13.97 |
12.00 |
14.00 |
12.83 |
| Rows of scales below lateral line |
5.00 |
6.00 |
5.33 |
5.00 |
6.00 |
5.50 |
5.00 |
6.00 |
5.50 |
| Rows of scales above lateral line |
6.00 |
8.00 |
6.67 |
6.00 |
8.00 |
6.63 |
6.00 |
8.00 |
6.70 |
| Total anal-fin rays |
22.00 |
25.00 |
23.40 |
22.00 |
25.00 |
23.57 |
21.00 |
25.00 |
23.07 |
| Total dorsal-fin rays |
10.00 |
13.00 |
11.50 |
10.00 |
12.00 |
11.43 |
11.00 |
13.00 |
11.60 |
| Total pectoral-fin rays |
12.00 |
15.00 |
13.63 |
12.00 |
15.00 |
13.70 |
12.00 |
14.00 |
13.10 |
| Total pelvic-fin rays |
8.00 |
9.00 |
8.47 |
8.00 |
9.00 |
8.57 |
8.00 |
9.00 |
8.57 |