title: Karyotypes and nuclear DNA contents of Polypteridae (Osteichthyes).
abstract: Calamoichthys calabaricus, Polypterus palmas, P. weeksii, P. delhezi and P. ornatipinnis have the same amount of DNA per erythrocyte nucleus. The karyotype of P. weeksii has 38 chromosomes and differs from the karyotypes of the other species, all with 36 chromosomes, by a Robertsonian chromosomal rearrangement. The karyotype condition is regarded as derived for vertebrates.
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000032:analysis; D004247:DNA / Q000097:blood*; D004912:Erythrocytes / Q000032:analysis; D005399:Fishes / Q000097:blood / Q000235:genetics*; D007621:Karyotyping; D013045:Species Specificity
chemical_list: D004247:DNA