Table 1.
Morphometric data for Pseudancistrus kayabi and Pseudancistrus asurini. SD = standard deviation.
| Pseudancistrus kayabi n = 21 | Pseudancistrus asurini n = 21 | |||||||
|---|---|---|---|---|---|---|---|---|
| Holotype | Range | Mean | SD | Holotype | Range | Mean | SD | |
| SL | 88.4 | 61.5−87.7 | 78.5 | 7.2 | 195.8 | 195.8−45.9 | 85.9 | 37.9 |
| Percentage of SL | ||||||||
| Predorsal length | 42.7 | 39.4−48.5 | 43.8 | 1.9 | 39.5 | 39.1−42.7 | 40.9 | 1.2 |
| Head length | 34.6 | 30.2−40.2 | 34.9 | 1.9 | 33.6 | 31.9−35.8 | 33.9 | 0.9 |
| Head-dorsal length | 8.0 | 7.1−11.0 | 9.3 | 1.0 | 7.5 | 5.3−8.2 | 6.9 | 0.7 |
| Cleithral width | 33.4 | 31.2−38.6 | 33.5 | 1.7 | 35.8 | 30.9−35.8 | 32.8 | 1.4 |
| Head-pectoral length | 29.1 | 24.5−33.6 | 29.6 | 2.0 | 31.7 | 21.9−31.7 | 28.3 | 1.8 |
| Thorax length | 22.8 | 19.6−25.6 | 22.2 | 1.6 | 20.1 | 20.1−25.5 | 22.7 | 1.5 |
| Pectoral spine length | 30.0 | 22.3−29.7 | 27.7 | 1.7 | 36.2 | 27.8−36.7 | 31.6 | 2.5 |
| Abdominal length | 24.2 | 20.3−30.4 | 24.3 | 2.2 | 20.5 | 20.5−26.0 | 23.9 | 1.4 |
| Pelvic spine length | 25.9 | 20.3−29.8 | 23.7 | 2.0 | 27.0 | 23.8−27.4 | 25.9 | 1.0 |
| Postanal length | 32.3 | 25.9−35.9 | 31.3 | 2.5 | 29.2 | 29.2−35.3 | 32.8 | 1.6 |
| Anal-fin spine length | 9.6 | 5.4−12.9 | 10.1 | 1.7 | 16.6 | 7.8−16.6 | 10.1 | 1.9 |
| Dorsal-pectoral depth | 26.4 | 20.2−29.4 | 25.9 | 1.9 | 24.0 | 23.3−26.5 | 24.8 | 0.9 |
| Dorsal spine length | 24.3 | 17.7−29.2 | 23.0 | 2.1 | 22.5 | 22.5−32.7 | 20.0 | 2.2 |
| Dorsal-pelvic depth | 22.4 | 15.2−26.7 | 21.2 | 2.3 | 19.3 | 17.2−26.5 | 20.1 | 2.0 |
| Dorsal-fin base length | 28.1 | 20.4−28.1 | 26.0 | 1.7 | 29.9 | 24.9−30.6 | 27.4 | 1.6 |
| Dorsal-adipose distance | 14.3 | 9.0−14.3 | 12.0 | 1.9 | 13.3 | 13.1−17.4 | 15.4 | 1.2 |
| Adipose-spine length | 10.1 | 6.3−16.9 | 9.1 | 2.4 | 8.6 | 7.7−10.3 | 8.6 | 0.6 |
| Dorsal adipose-caudal distance | 16.0 | 13.4−22.0 | 16.3 | 2.3 | 12.1 | 12.1−16.5 | 15.0 | 1.0 |
| Caudal peduncle depth | 11.3 | 10.0−16.7 | 11.0 | 1.5 | 10.6 | 9.1−11.0 | 10.2 | 0.5 |
| Ventral adipose-caudal distance | 22.6 | 20.3−25.6 | 22.2 | 1.2 | 19.5 | 19.5−22.9 | 21.3 | 1.0 |
| Adipose-anal distance | 18.9 | 16.9−24.8 | 19.6 | 1.9 | 18.8 | 16.9−19.9 | 18.8 | 0.8 |
| Dorsal-anal distance | 33.1 | 29.3−35.4 | 32.8 | 1.4 | 12.6 | 12.1−19.1 | 13.3 | 1.5 |
| Pelvic-dorsal distance | 27.6 | 17.4−27.6 | 21.1 | 1.8 | 28.2 | 18.3−29.4 | 25.7 | 2.7 |
| Percentage of HL | ||||||||
| Head-eye length | 26.4 | 25.8−31.4 | 28.8 | 1.5 | 27.7 | 25.9−33.1 | 29.2 | 1.8 |
| Orbital diameter | 13.8 | 12.7−20.3 | 15.5 | 1.7 | 13.1 | 13.1−19.9 | 16.8 | 1.7 |
| Snout length | 67.4 | 62.3−69.3 | 65.4 | 1.6 | 69.5 | 56.6−72.4 | 62.2 | 4.5 |
| Internares width | 14.8 | 13.2−18.7 | 15.8 | 1.3 | 15.5 | 11.9−16.3 | 14.5 | 1.2 |
| Minimal interorbital distance | 30.6 | 27.4−35.7 | 29.1 | 1.9 | 31.9 | 24.0−32.6 | 28.2 | 2.4 |
| Mouth length | 48.8 | 48.8−62.3 | 57.5 | 2.5 | 49.7 | 39.8−51.9 | 45.9 | 3.5 |
| Barbel length | 10.9 | 4.2−10.9 | 8.0 | 1.6 | 5.5 | 4.6−8.7 | 7.2 | 1.3 |
| Dentary tooth cup length | 20.8 | 15.4−24.6 | 20.5 | 2.6 | 20.1 | 16.1−22.4 | 19.8 | 1.7 |
| Premaxillary tooth cup length | 19.5 | 16.5−25.6 | 19.5 | 2.2 | 18.1 | 17.8−24.3 | 20.5 | 1.9 |
| Head depth | 64.2 | 59.7−65.7 | 62.4 | 1.8 | 64.3 | 56.6−66.2 | 62.6 | 2.4 |