Table 1. Morphometric data of holotype and paratypes of Trichomycterus payaya (n = 15). The ranges include the holotype. SD = Standard deviation.
|
Holotype |
Range |
Mean |
SD |
| Standard length (mm) |
37.4 |
29.2-37.4 |
32.7 |
- |
| Total length (mm) |
43.7 |
33.0-43.7 |
38.0 |
- |
| Percents of Standard length |
| Body depth |
13.9 |
13.2-16.3 |
14.4 |
1.12 |
| Body width |
10.7 |
10.0-14.0 |
11.6 |
1.21 |
| Caudal peduncle depth |
9.1 |
7.5-10.2 |
8.8 |
0.79 |
| Caudal peduncle length |
19.5 |
17.4-22.2 |
19.7 |
1.18 |
| Predorsal length |
67.6 |
64.9-68.5 |
66.9 |
1.11 |
| Preanal length |
69.3 |
66.8-71.8 |
68.8 |
1.39 |
| Prepelvic length |
58.3 |
53.5-58.3 |
54.8 |
1.81 |
| Dorsal-fin base length |
9.9 |
9.9-12.9 |
11.4 |
0.85 |
| Anal-fin base length |
8.3 |
7.8-10.7 |
9.2 |
0.88 |
| Dorsal-caudal length |
12.1 |
7.6-12.5 |
10.3 |
1.53 |
| Nasal barbel length |
14.2 |
12.9-15.9 |
14.8 |
0.93 |
| Maxillary barbel length |
16.6 |
13.8-19.1 |
16.3 |
1.26 |
| Rictal barbel length |
13.1 |
12.6-15.8 |
13.7 |
0.91 |
| Head length |
20.3 |
19.7-22.4 |
21.1 |
0.81 |
| Percents of Head length |
| Head width |
81.6 |
78.1-82.9 |
80.8 |
1.44 |
| Head depth |
42.1 |
37.0-43.1 |
40.1 |
1.85 |
| Inteorbital distance |
25.0 |
25.0-29.3 |
27.3 |
1.52 |
| Internarial distance |
15.8 |
11.9-15.8 |
14.4 |
1.25 |
| Internarial width |
21.4 |
21.1-27.3 |
24.3 |
2.01 |
| Snout length |
35.5 |
32.8-38.8 |
35.8 |
1.74 |
| Orbital diameter |
11.8 |
9.6-12.3 |
11.2 |
0.84 |
| Mouth width |
36.8 |
35.6-40.9 |
38.4 |
1.50 |