The Giemsa-banded karyotype of Romerolagus diazi

The Giemsa-banded karyotype of Romerolagus diazi is described. The animal has 48 chromosomes, which can be divided into five groups. Group 1 has 5 chromosome pairs, of which Nos. 1, 2 and 5 are metacentric, and 3 and 4 submetacentric. Group 2 consists of 5 pairs of submetacentric chromosomes, group 3 of 4 submetacentric (11–13, 15) and 2 acrocentric chromosomes (14, 16). The X chromosome is large and submetacentric, the Y, medium-sized and submetacentric (group 5).