TABLE 5 | Descriptive morphometrics of Rhinotocinclus species. Values given as percent of standard length or head length. Range includes the holotype (Hol), SD = standard deviation.
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R. kwarup n=20 |
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R. discolor n=20 |
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R. pilosus n=20 |
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R. isabelae n=15 |
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| Character |
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Hol |
Low |
High |
Mean |
SD |
Hol |
Low |
High |
Mean |
SD |
Hol |
Low |
High |
Mean |
SD |
Hol |
Low |
High |
Mean |
SD |
| Standard length (mm) |
21.6 |
18.8 |
23.7 |
21.3 |
|
24.4 |
21.6 |
25.2 |
23.3 |
|
22.6 |
18.1 |
22.6 |
20.2 |
|
17.6 |
14.6 |
17.9 |
16.6 |
|
| Percent of SL |
| Body depth |
15.1 |
13.6 |
17.2 |
15.7 |
0.88 |
16.2 |
16.2 |
18.7 |
17.2 |
0.71 |
16.9 |
15.4 |
18.9 |
17.3 |
0.84 |
19.9 |
17.8 |
20.9 |
19.4 |
0.85 |
| Predosal distance |
44.5 |
44.5 |
48.4 |
46.7 |
1.11 |
46.6 |
46.2 |
50.3 |
47.7 |
1.13 |
48.6 |
47.8 |
51.4 |
49.8 |
1.00 |
48.8 |
45.7 |
50.9 |
48.6 |
1.48 |
| Prepelvic distance |
42.4 |
40.6 |
44.9 |
42.5 |
0.98 |
42.6 |
42.1 |
46.0 |
43.8 |
1.17 |
45.1 |
44.1 |
48.2 |
46.3 |
1.05 |
44.3 |
41.1 |
48.4 |
45.3 |
1.75 |
| Preanal distance |
65.5 |
62.2 |
67.5 |
65.2 |
1.40 |
64.6 |
63.6 |
67.1 |
65.4 |
1.03 |
68.6 |
65.9 |
71.8 |
69.1 |
1.36 |
66.8 |
64.3 |
69.7 |
67.1 |
1.80 |
| Preadipose distance |
78.2 |
72.3 |
80.0 |
76.7 |
1.65 |
75.6 |
74.1 |
78.3 |
76.2 |
1.04 |
78.4 |
75.4 |
80.3 |
78.3 |
1.22 |
74.8 |
74.8 |
79.8 |
77.0 |
1.39 |
| Dorsal-fin spine length |
23.7 |
20.5 |
27.7 |
24.0 |
1.59 |
25.3 |
23.2 |
25.3 |
24.1 |
0.62 |
24.2 |
21.1 |
25.3 |
23.1 |
0.92 |
25.1 |
22.6 |
26.0 |
24.4 |
0.86 |
| Anal-fin unbranched ray length |
16.0 |
12.1 |
17.1 |
14.8 |
1.12 |
15.6 |
13.5 |
17.3 |
16.1 |
0.80 |
13.6 |
12.4 |
16.4 |
14.4 |
1.01 |
17.1 |
16.6 |
20.4 |
18.1 |
0.99 |
| Adipose-fin spine length |
7.2 |
5.3 |
8.4 |
7.1 |
0.74 |
8.6 |
7.6 |
10.3 |
8.5 |
0.82 |
6.1 |
6.0 |
7.9 |
6.7 |
0.51 |
7.4 |
7.0 |
9.4 |
8.0 |
0.59 |
| Pectoral-fin spine length |
28.4 |
23.9 |
29.6 |
26.6 |
1.62 |
26.9 |
24.8 |
27.3 |
26.4 |
0.65 |
28.4 |
24.7 |
29.8 |
27.1 |
1.24 |
29.2 |
27.9 |
30.2 |
29.2 |
0.62 |
| Caudal peduncle depth |
8.3 |
7.3 |
8.6 |
7.9 |
0.35 |
7.7 |
7.7 |
8.6 |
8.2 |
0.25 |
6.4 |
6.3 |
7.5 |
6.7 |
0.30 |
8.1 |
8.1 |
8.8 |
8.5 |
0.24 |
| Dorsal-adipose fin distance |
20.0 |
18.9 |
20.9 |
19.8 |
0.52 |
16.6 |
13.3 |
18.1 |
16.0 |
1.51 |
16.7 |
12.8 |
17.5 |
15.2 |
1.49 |
14.4 |
12.3 |
16.5 |
14.7 |
1.45 |
| Dorsal-fin base length |
12.2 |
9.5 |
12.7 |
11.3 |
0.93 |
11.8 |
10.1 |
12.9 |
12.0 |
0.69 |
12.7 |
11.2 |
14.7 |
12.3 |
1.01 |
12.9 |
11.6 |
13.7 |
12.6 |
0.59 |
| Lower caudal-fin principal ray |
23.9 |
21.1 |
28.7 |
25.0 |
1.81 |
28.4 |
25.2 |
29.7 |
27.5 |
1.35 |
24.0 |
21.3 |
27.3 |
23.7 |
1.32 |
27.4 |
23.4 |
29.1 |
27.4 |
1.43 |
| Cleithral width |
27.5 |
24.4 |
27.5 |
26.0 |
0.97 |
26.6 |
26.5 |
28.3 |
27.2 |
0.52 |
27.3 |
27.2 |
29.0 |
28.0 |
0.51 |
31.6 |
29.5 |
31.6 |
30.5 |
0.56 |
| Head length |
35.3 |
32.4 |
37.4 |
35.4 |
1.60 |
37.0 |
36.8 |
39.3 |
37.8 |
0.72 |
38.9 |
38.9 |
43.1 |
41.7 |
0.97 |
40.2 |
39.4 |
42.7 |
40.8 |
1.05 |
| Percent of HL |
| Head depth |
43.6 |
41.2 |
48.0 |
44.4 |
1.90 |
42.1 |
39.5 |
48.4 |
42.8 |
2.61 |
41.7 |
36.2 |
43.0 |
39.9 |
1.66 |
47.2 |
46.4 |
50.8 |
48.6 |
1.30 |
| Interorbital distance |
37.1 |
31.9 |
37.7 |
35.3 |
1.76 |
30.9 |
28.7 |
34.4 |
31.0 |
1.45 |
36.7 |
32.0 |
36.7 |
33.5 |
1.12 |
34.5 |
33.0 |
36.3 |
34.9 |
1.02 |
| Orbital horizontal diameter |
18.8 |
16.8 |
21.3 |
18.6 |
1.36 |
18.1 |
15.4 |
19.7 |
17.7 |
1.23 |
18.4 |
15.0 |
18.9 |
16.8 |
0.95 |
16.5 |
15.8 |
17.8 |
16.8 |
0.63 |
| Snout length |
52.4 |
50.0 |
55.8 |
53.0 |
1.30 |
52.7 |
49.7 |
58.5 |
53.0 |
2.41 |
57.3 |
53.4 |
57.3 |
55.1 |
1.11 |
52.5 |
51.5 |
54.7 |
53.3 |
1.03 |
| Internarial distance |
9.1 |
6.4 |
10.4 |
8.5 |
0.99 |
8.3 |
7.7 |
10.8 |
9.0 |
0.85 |
11.1 |
8.6 |
11.8 |
10.1 |
0.95 |
10.3 |
9.6 |
11.6 |
10.7 |
0.55 |
| Tooth count |
| Premaxilla |
- |
28 |
34 |
30.2 |
2.13 |
24 |
23 |
26 |
24.3 |
0.99 |
35 |
31 |
37 |
33.8 |
1.81 |
22 |
21.0 |
29.0 |
24.3 |
2.46 |
| Dentary |
- |
27 |
33 |
29.8 |
1.66 |
24 |
19 |
24 |
21.9 |
1.58 |
34 |
29 |
35 |
31.8 |
1.96 |
20 |
18.0 |
24.0 |
21.5 |
2.20 |