The lowest diploid number in Testudines: Banding patterns telomeric and 45S rDNA FISH in Peltocephalus dumerilianus 2n = 26 and FN = 52 (Pleurodira Podocnemididae)

摘要

The karyotype of the big-headed Amazon River turtle, Peltocephalus dumerilianus, is characterized based on a sample of seven juveniles from Reserva Biológica do Rio Trombetas, Pará State, Brazil (1°30′ S, 56°34′ W). Here we present the first results on GTG and CBG-banding patterns, Ag-NOR staining and FISH, with telomeric and 45S rDNA sequences as probes. A cytogenetic comparison with related Podocnemidae is also provided.