A new genus of armored catfish (Siluriformes: Loricariidae) from the Greater Amazon, with a review of the species and description of five new species
Author
Reis, Roberto E.
PontifÍcia Universidade Católica do Rio Grande do Sul. Av. Ipiranga, 6681, P. O. Box 1429, 90619 - 900 Porto Alegre, RS, Brazil.
reis@pucrs.br
Author
Lehmann A., Pablo
Laboratório de Ictiologia, Universidade do Vale do Rio dos Sinos. Av. Unisinos, 950, 93022 - 000 São Leopoldo, RS, Brazil.
pablole@unisinos.br.
text
Neotropical Ichthyology
2022
e 220002
2022-07-08
20
2
1
100
http://dx.doi.org/10.1590/1982-0224-2022-0002
journal article
10.1590/1982-0224-2022-0002
1f6c7a0d-e5f8-479d-be08-03fd894b7cfe
1982-0224
13350428
0A755C8D-B807-41CF-825B-BD3209119D54
TABLE 4 | Descriptive morphometrics of Rhinotocinclus species. Values given as percent of standard length or head length. Range includes the holotype (Hol), SD = standard deviation. | | R. eppleyi n = 16 | | | R. variola n = 18 | | | R. yaka n = 14 | |
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| Character | | | | | | | | | | | | | |
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| Low | High | Mean | SD | Low | High | Mean | SD | Hol | Low | High | Mean | SD |
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| Standard length (mm) | 19.4 | 28.1 | 23.1 | | 19.5 | 30.0 | 23.6 | | 29.4 | 17.9 | 30.06 | 24.0 | |
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| Percent of SL |
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| Body depth | 14.7 | 19.1 | 16.4 | 1.34 | 16.2 | 20.0 | 17.9 | 1.18 | 15.9 | 14.0 | 17.2 | 15.9 | 0.89 |
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| Predosal distance | 45.6 | 50.3 | 48.2 | 1.28 | 46.6 | 51.0 | 49.0 | 1.13 | 47.8 | 46.3 | 51.3 | 48.2 | 1.68 |
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| Prepelvic distance | 42.7 | 49.0 | 45.8 | 1.69 | 42.7 | 47.9 | 45.1 | 1.44 | 43.7 | 41.8 | 51.2 | 44.6 | 2.30 |
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| Preanal distance | 65.0 | 70.5 | 67.0 | 1.49 | 66.7 | 70.8 | 68.0 | 1.12 | 66.1 | 64.4 | 68.6 | 66.1 | 1.22 |
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| Preadipose distance | 74.6 | 80.7 | 77.2 | 1.85 | 75.9 | 81.3 | 78.3 | 1.37 | 79.3 | 75.0 | 79.3 | 77.0 | 1.37 |
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| Dorsal-fin spine length | 21.0 | 25.2 | 23.0 | 1.37 | 23.6 | 27.0 | 25.2 | 1.02 | 24.3 | 20.0 | 25.9 | 24.3 | 1.60 |
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| Anal-fin unbranched ray length | 13.1 | 15.0 | 14.0 | 0.73 | 13.8 | 16.7 | 14.9 | 0.82 | 13.5 | 12.8 | 16.7 | 14.7 | 1.04 |
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| Adipose-fin spine length | 7.7 | 11.1 | 8.8 | 1.07 | 6.4 | 8.4 | 7.2 | 0.53 | 7.5 | 6.1 | 8.3 | 7.2 | 0.68 |
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| Pectoral-fin spine length | 29.0 | 31.2 | 30.0 | 0.67 | 30.2 | 34.0 | 32.1 | 1.15 | 27.8 | 26.4 | 31.4 | 29.2 | 1.36 |
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| Caudal peduncle depth | 6.9 | 7.8 | 7.3 | 0.30 | 6.8 | 7.8 | 7.2 | 0.28 | 6.9 | 6.8 | 8.1 | 7.4 | 0.35 |
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| Dorsal-adipose fin distance | 16.5 | 19.5 | 18.1 | 1.03 | 13.5 | 19.1 | 16.5 | 1.63 | 16.8 | 13.1 | 17.8 | 16.2 | 1.16 |
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| Dorsal-fin base length | 9.8 | 14.2 | 12.5 | 1.25 | 11.7 | 15.5 | 13.6 | 1.02 | 13.2 | 10.3 | 14.1 | 12.5 | 1.06 |
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| Lower caudal-fin principal ray | 20.5 | 25.8 | 23.2 | 1.85 | 22.8 | 27.2 | 25.0 | 1.20 | 23.3 | 23.3 | 28.2 | 25.9 | 1.49 |
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| Cleithral width | 24.8 | 28.0 | 26.0 | 0.82 | 27.7 | 30.8 | 28.9 | 0.90 | 26.0 | 25.5 | 27.9 | 26.5 | 0.57 |
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| Head length | 38.0 | 42.6 | 39.2 | 1.34 | 37.5 | 41.7 | 39.5 | 1.10 | 35.5 | 35.4 | 42.2 | 38.4 | 2.41 |
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| Percent of HL |
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| Head depth Interorbital distance Orbital horizontal diameter Snout length Internarial distance | 37.5 29.6 14.7 52.4 6.7 | 43.1 36.1 17.1 56.8 10.3 | 40.7 32.1 15.8 54.7 8.8 | 1.61 1.84 0.72 1.14 1.19 | 36.9 32.0 15.5 55.2 8.2 | 48.7 37.0 17.5 57.7 11.7 | 43.6 34.5 16.4 56.6 9.5 | 3.22 1.42 0.51 0.86 0.79 | 45.3 36.8 15.4 55.4 10.0 | 37.3 32.2 15.0 53.3 6.3 | 46.4 38.6 17.8 56.5 10.1 | 42.6 35.6 16.4 54.9 8.2 | 3.27 1.85 0.76 0.92 1.21 |
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| Tooth count |
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| Premaxilla Dentary | 22 21 | 30 27 | 25.1 24.1 | 2.14 1.80 | 33.0 33.0 | 51.0 43.0 | 39.8 36.7 | 4.49 2.75 | 39 41 | 34 31 | 39 41 | 35.9 35.7 | 1.86 3.74 |
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