Description of three new species of Eigenmannia (Gymnotiformes: Sternopygidae) from the rio Mearim and rio Parnaíba basins, Northeastern Brazil
Author
Dutra, Guilherme Moreira
Museu de Zoologia da Universidade de São Paulo, Av. Nazaré, 481, Ipiranga, 04263 - 000 São Paulo, SP, Brazil. (GMD) guilhermedutr @ yahoo. com. br (corresponding author), (NAM) naercio @ usp. br.
guilhermedutr@yahoo.com.br
Author
Ramos, Telton Pedro Anselmo
Universidade Estadual da ParaÍba, Laboratório de Ecologia Aquática, Depart \ amento de Biologia / CCBS, Rua Baraúnas, 351, Universitário, 58429 - 500 Campina Grande, PB, Brazil. telton @ gmail. com.
Brazil.telton@gmail.com
Author
Menezes, Naércio Aquino
Museu de Zoologia da Universidade de São Paulo, Av. Nazaré, 481, Ipiranga, 04263 - 000 São Paulo, SP, Brazil. (GMD) guilhermedutr @ yahoo. com. br (corresponding author), (NAM) naercio @ usp. br.
guilhermedutr@yahoo.com.br
text
Neotropical Ichthyology
2022
e 210117
2022-04-01
20
1
1
23
http://dx.doi.org/10.1590/1982-0224-2021-0117
journal article
294719
10.1590/1982-0224-2021-0117
84319239-e080-41ff-8f38-8e06aca6ac16
1982-0224
11061232
B697E833-69B4-468E-8DF6-43421EFB2B24
TABLE 1 | Morphometrics for examined specimens of Eigenmannia bumba, E. cacuria, and E. robsoni. | | Eigenmannia bumba | | | Eigenmannia cacuria | | | Eigenmannia robsoni | |
|---|
| Holotype | Min | Max | Mean | SD | N | Holotype | Min | Max | Mean | SD | N | Holotype | Min | Max | Mean | SD | N |
|---|
| Total length (mm) | 117.5 | 104.8 | 148.7 | - | - | 15 | 152.4 | 74.9 | 152.4 | - | - | 7 | 175.1 | 83.8 | 151.8 | - | - | 19 |
|---|
| Length to end of anal fin (mm) | 148.7 | 83.5 | 123.5 | - | - | 15 | 110.0 | 53.6 | 134.0 | - | - | 10 | 139.3 | 110.5 | 207.0 | - | - | 14 |
|---|
| Head length (mm) | 14.0 | 11.3 | 16.5 | - | - | 15 | 12.9 | 7.5 | 14.3 | - | - | 10 | 16.1 | 12.1 | 19.0 | - | - | 19 |
|---|
| Caudal-filament length (mm) | 31.2 | 17.0 | 31.2 | - | - | 15 | 42.5 | 21.3 | 42.5 | - | - | 7 | 35.8 | 21.9 | 55.2 | - | - | 14 |
|---|
| Percent of length to the end of anal fin |
|---|
| Caudal-filament length | 26.6 | 19.2 | 30.8 | 24.7 | 3.4 | 15 | 38.6 | 26.4 | 41.3 | 36.7 | 4.9 | 7 | 25.7 | 19.9 | 36.4 | 27.2 | 5.0 | 14 |
|---|
| Greatest body depth | 17.7 | 15.5 | 17.7 | 16.4 | 0.7 | 15 | 16.1 | 14.8 | 17.8 | 16.6 | 0.8 | 9 | 13.9 | 13.5 | 18.7 | 15.6 | 1.7 | 17 |
|---|
| Body depth at anal-fin origin | 15.3 | 13.2 | 15.5 | 14.4 | 0.8 | 15 | 14.7 | 12.9 | 16.2 | 14.9 | 0.9 | 9 | 12.8 | 12.8 | 18.5 | 14.5 | 1.6 | 18 |
|---|
| Body width | 7.2 | 5.4 | 7.6 | 6.4 | 0.6 | 15 | 6.2 | 5.3 | 7.6 | 6.5 | 0.6 | 9 | 5.6 | 4.9 | 8.5 | 6.0 | 0.9 | 18 |
|---|
| Preanal-fin distance | 17.1 | 15.4 | 18.9 | 17.6 | 0.9 | 15 | 16.3 | 13.3 | 19.1 | 17.1 | 1.7 | 9 | 14.7 | 14.7 | 20.2 | 17.1 | 1.8 | 18 |
|---|
| Prepectoral-fin distance | 13.2 | 10.1 | 15.8 | 13.8 | 1.6 | 15 | 12.5 | 11.2 | 15.0 | 13.7 | 1.2 | 9 | 12.8 | 10.2 | 16.5 | 13.9 | 1.5 | 18 |
|---|
| Anal-fin length | 85.4 | 78.1 | 89.4 | 84.8 | 2.8 | 15 | 86.4 | 82.5 | 88.3 | 86.0 | 1.5 | 9 | 87.5 | 81.3 | 89.9 | 85.0 | 2.6 | 18 |
|---|
| Pectoral-fin length | 8.4 | 8.4 | 10.6 | 9.8 | 0.6 | 15 | 8.2 | 7.2 | 10.3 | 8.6 | 1.1 | 9 | 8.8 | 0.0 | 12.2 | 9.5 | 2.6 | 18 |
|---|
| Snout to anus | 7.6 | 7.6 | 12.2 | 9.7 | 1.3 | 15 | 7.6 | 6.0 | 13.6 | 10.1 | 2.7 | 9 | 7.5 | 6.9 | 12.1 | 8.9 | 1.5 | 17 |
|---|
| Head length | 11.9 | 11.9 | 14.1 | 13.2 | 0.7 | 15 | 11.7 | 10.7 | 14.0 | 12.9 | 1.1 | 9 | 11.5 | 11.5 | 15.0 | 13.1 | 1.1 | 18 |
|---|
| Percent of head length |
|---|
| Head width at opercle | 59.2 | 52.6 | 59.3 | 57.0 | 1.9 | 15 | 59.5 | 54.8 | 64.7 | 58.8 | 3.1 | 10 | 55.7 | 51.0 | 61.4 | 55.1 | 3.0 | 19 |
|---|
| Head width at eye | 52.2 | 40.6 | 52.2 | 48.2 | 3.0 | 15 | 50.0 | 41.6 | 52.5 | 47.9 | 3.6 | 10 | 47.0 | 42.1 | 49.8 | 45.4 | 2.1 | 19 |
|---|
| Head depth at nape | 81.0 | 76.1 | 83.3 | 79.5 | 2.2 | 15 | 86.5 | 81.4 | 89.6 | 85.5 | 3.0 | 10 | 81.6 | 73.3 | 88.0 | 79.3 | 3.9 | 19 |
|---|
| Head depth at eye | 59.7 | 57.6 | 66.5 | 61.8 | 2.5 | 15 | 69.2 | 58.6 | 69.2 | 65.1 | 3.3 | 10 | 62.6 | 54.9 | 66.2 | 60.2 | 3.0 | 19 |
|---|
| Snout length | 32.4 | 31.7 | 37.0 | 33.7 | 1.3 | 15 | 35.3 | 29.1 | 35.3 | 32.2 | 1.7 | 10 | 37.2 | 30.5 | 37.2 | 33.7 | 1.9 | 19 |
|---|
| Snout to posterior nostril | 24.7 | 21.1 | 24.7 | 22.9 | 1.2 | 15 | 23.2 | 20.8 | 24.8 | 22.8 | 1.1 | 10 | 25.1 | 20.3 | 26.0 | 23.6 | 1.5 | 19 |
|---|
| Posterior nostril to eye | 10.6 | 8.3 | 11.6 | 9.9 | 0.9 | 15 | 11.3 | 8.5 | 12.7 | 10.7 | 1.2 | 10 | 10.4 | 8.4 | 23.9 | 10.7 | 3.5 | 19 |
|---|
| Postorbital distance | 48.1 | 48.0 | 53.3 | 50.0 | 1.7 | 15 | 54.8 | 49.8 | 54.9 | 52.6 | 1.8 | 10 | 55.2 | 48.2 | 57.8 | 52.1 | 2.7 | 19 |
|---|
| Branchial opening | 31.6 | 26.8 | 36.9 | 30.6 | 2.7 | 15 | 30.5 | 27.9 | 33.6 | 30.7 | 1.8 | 10 | 27.4 | 24.7 | 32.9 | 30.4 | 2.2 | 19 |
|---|
| Internarial width | 19.2 | 16.8 | 23.4 | 20.0 | 1.7 | 15 | 19.7 | 17.2 | 21.0 | 19.9 | 1.1 | 10 | 21.4 | 17.4 | 21.5 | 19.9 | 1.1 | 19 |
|---|
| Internarial distance | 12.5 | 10.5 | 13.5 | 11.9 | 0.9 | 15 | 12.0 | 10.5 | 13.3 | 11.9 | 0.9 | 10 | 11.1 | 9.3 | 14.1 | 11.7 | 1.1 | 19 |
|---|
| Interorbital distance | 34.9 | 31.0 | 36.6 | 33.1 | 1.5 | 15 | 41.6 | 34.3 | 43.1 | 39.0 | 2.5 | 10 | 33.4 | 29.1 | 36.4 | 32.1 | 1.9 | 19 |
|---|
| Eye diameter | 21.6 | 21.3 | 25.4 | 23.8 | 1.3 | 15 | 17.5 | 17.5 | 21.1 | 19.0 | 1.1 | 10 | 18.1 | 17.2 | 24.5 | 20.6 | 1.9 | 19 |
|---|
| Mouth length | 19.3 | 17.1 | 23.6 | 19.3 | 1.8 | 15 | 23.4 | 18.4 | 23.5 | 21.1 | 1.9 | 10 | 19.0 | 17.1 | 23.6 | 20.2 | 1.6 | 19 |
|---|
| Mouth width | 18.7 | 16.6 | 20.3 | 18.4 | 1.1 | 15 | 18.8 | 14.5 | 22.2 | 19.2 | 2.1 | 10 | 17.6 | 16.2 | 21.3 | 18.1 | 1.3 | 19 |
|---|
| Percent of caudal filament length |
|---|
| Caudal-filament width | 3.6 | 3.0 | 4.4 | 3.7 | 0.4 | 9 | 2.7 | 1.8 | 3.5 | 2.8 | 0.6 | 7 | 4.2 | 2.2 | 7.7 | 3.9 | 1.6 | 12 |
|---|
| Caudal-filament depth | 6.1 | 4.8 | 10.2 | 6.8 | 1.6 | 9 | 3.6 | 3.3 | 6.5 | 4.3 | 1.1 | 7 | 8.4 | 4.7 | 10.2 | 6.9 | 1.6 | 12 |
|---|