Table 2.
A review of the cytogenetic information in Rhamphichthyoidea from Cardoso et al.(2011) with modifications.
| Family / Species | 2n | KF | Sex system | CB | NOR | References |
|---|---|---|---|---|---|---|
| Hipopomidae | ||||||
| Hypopomus artedi Kaup, 1856 | 38 | 32m-sm / 6st-a | Absent | - | - | Almeida–Toledo (1978) in Oliveira et al. (2009) |
| Brachyhypopomus brevirostris Steindachner, 1868 | 36 | 6m-sm / 30st-a | Absent | - | - | Almeida–Toledo (1978) in Oliveira et al. (2009) |
| Brachyhypopomus pinnicaudatus (Hopkins, 1991) | 41♂ / 42♀ | 1m/41a♂ / 42a♀ | X1X2Y | Centromeric region of most chromosomes | Multiple | Almeida–Toledo et al. (2000) |
| Hypopygus lepturus Hoedeman, 1962 | 50 | 36m-sm / 14st-a | Absent | - | - | Almeida–Toledo (1978) in Oliveira et al. (2009) |
| Steatogenys elegans (Steindachner, 1880) | 50 | 12m-sm/ 38st-a | ZZ/ZW | Centromeric region of all chromosomes and interstitial (1q and 2 blocks in Wq) | Single | Cardoso et al. (2011) |
| Steatogenys duidae (La Monte, 1929) | 50 | 50 m-sm | Absent | Centromeric and pericentromeric region of all chromosomes and interstitial (2q , 3q, 5q and 7q) | Single | Cardoso et al. (2011) |
| Rhamphichthyidae | ||||||
| Rhamphichthys hahni (Meinken, 1937) | 50 | 44m-sm / 6a | Absent | Centromeric region of most chromosomes and blocks of CH in three chromosomes (SM) | Single | Mendes et al. (2012) |
| Rhamphichthys marmoratus Castelnau, 1855 | 50 | 44m-sm / 6st-a | Absent | Centromeric region of most chromosomes and interstitial blocks (4q and 14p) | Single | Present work |
| Rhamphichthys prope rostratus (Linnaeus, 1766) | 50 | 42m-sm / 8a | Absent | Centromeric region of most chromosomes and interstitial blocks (3q, 4q and 19p) | Single | Present work |