Table 1.
Cytogenetic data from the genus Gymnotus, including 2n, karyotype formula (KF), NOR and ribosomal DNA sequences 18 and 5S.
| Species | 2n (KF) | NOR* | 18S* | 5S* | Authors |
|---|---|---|---|---|---|
| Gymnotus arapaima | 44 (24 m/sm + 20 st/a) | 2 | 2 | – | Milhomem et al., 2012b |
| Gymnotus bahianus | ♀36 (30 m/sm + 6 st) ♂37 (32 m/sm + 5 st) |
2 | 2 | 2 | Almeida et al., 2015 |
| Gymnotus carapo | 54 (54 m/sm) | 2 | – | – | Foresti et al., 1984 |
| 52 (50 m/sm + 2 st/a) | 2 | – | – | ||
| 48 (34 m/sm + 14 st/a) | – | – | – | ||
| 42 (32 m/sm + 10 st/a) | 2 | – | – | Fernandes-Matioli et al., 1998 | |
| 54 (52 m/sm + 2 st/a) | 2 | – | – | Claro, 2008 | |
| 54 (52 m/sm + 2 st/a) | 2 | 14 | 2 | Milhomem et al., 2007 | |
| 42 (30 m/sm + 12 st/a) | 2 | – | – | Milhomem et al., 2008 | |
| 40 (28 m/sm + 12 st/a) | 2 | – | – | ||
| Gymnotus cf. carapo | 54 (50 m/sm + 4 st/a) | 2 | 2 | ≤ 30 | Scacchetti et al., 2011 |
| Gymnotus carapo'Catalão' | 40 (30 m/sm + 10 st) | – | 2 | 4 | da Silva et al., 2014 |
| Gymnotus carapo'Maranhão' | 42 (30 m/sm + 12 st/4a) | – | 2 | 14 | da Silva, 2015 |
| Gymnotus capanema | 34 (20 m/sm + 14 st/a) | 2 | 2 | – | Milhomem et al., 2012a |
| Gymnotus coatesi | 50 (24 m/sm + 26 st/a) | 8 | 19 | 2 | Machado et al., 2017 |
| Gymnotus coropinae | ♀50 (28 m/sm + 22 st/a) ♂49 (26 m/sm + 23 st/a) |
– | 2 | 2 | da Silva et al., 2014 |
| Gymnotus inaequilabiatus | 52 (50 m/sm + 2 st/a) | 2 | – | – | Fernandes-Matioli et al., 1998 |
| 54 (52 m/sm + 2 st/a) | – | 2 | ≤34 | Scacchetti et al., 2011 | |
| Gymnotus javari | 50 (20 m/sm + 30 st/a) | – | – | 2 | Utsunomia et al., 2014 |
| Gymnotus jonasi | 52 (12 m/sm + 40 st/a) | 6 | 6 | – | Milhomem et al., 2012b |
| Gymnotus mamiraua | 54 (50 m/sm + 4 st/a) | – | – | – | |
| 54 (38 m/sm + 16 st/a) | 2 | 2 | 26 | Milhomem et al., 2012b da Silva et al., 2016 | |
| Gymnotus pantanal | 40 (14 m/sm + 26 st/a) ♀40 (14 m/sm + 26 st/a) ♂39 (15 m/sm + 24 st/a) |
4 2 | – – | – 4 | Fernandes et al., 2005. Margarido et al., 2007; da Silva et al., 2011 |
| Gymnotus pantherinus | 52 (46 m/sm + 6 st/a) | 2 | – | – | Fernandes-Matioli et al., 1998 |
| 52 (50 m/sm + 2 st/a) | 2 | 2 | 4 | Scacchetti et al., 2011 | |
| Gymnotus paraguensis | 54 (52 m/sm + 2 st) | 2 | – | 38 | Margarido et al., 2007; da Silva et al., 2011 |
| 54 (50 m/sm + 4 st) | 2 | – | – | Lacerda and Maistro, 2007 | |
| Gymnotus cf. pedanopterus | 50 (42 m/sm + 8 st/a) | – | 2 | 2 | da Silva, 2015 |
| Gymnotus cf. stenoleucus | 48 (20 m/sm + 28 st/a) | – | 2 | 2 | da Silva, 2015 |
| Gymnotus sylvius | 40 (38 m/sm + 2 st/a) | 2 | – | – | Fernandes-Matioli et al., 1998 |
| 40 (30 m/sm + 10 st/a) | 2 | – | – | Albert et al., 1999 | |
| 40 (38 m/sm + 2 st/a) | 2 | – | – | Claro, 2008 | |
| 40 (36 m/sm + 4 st/a) | 2 | – | – | Lacerda and Maistro, 2007 | |
| 40 (36 m/sm + 4 st/a) | 2 | – | – | Margarido et al., 2007 | |
| 40 (34 m/sm + 6 st) | 2 | 2 | 2 | Scacchetti et al., 2011 | |
| Gymnotus ucamara | 44 (28 m/sm + 16 st/a) | – | 2 | 4 | da Silva, 2015 |
| Gymnotus sp. | 50 (26 m/sm + 24 st/a) | 2 | – | – | Lacerda and Maistro, 2007 |
| Gymnotus sp. ‘Negro’ | ♀50 (22 m/sm + 28 st) ♂50 (21 m/sm + 29 st) |
– | 2 | 4 | da Silva et al., 2014 |
*
Number of chromosome with signals; m, metacentric; sm, submetacentric; st, subtelocentric; a, acrocentric.