B. ibericus at higher magnification, for detailed comparison (a–k) a–c paratypes, Spain, Peña Lara, plain (Giemsa stained) a ♂, autosomes 1 and 24 homozygous fused b ♂, autosomes 1 and 24 heterozygous for fusion c ♀, autosomes 1 and 24 homozygous unfused; shown as fig. 2j–l by Dutton and Angus (2007) d, e paratypes, Italy, Alpi Maritimi: plain d ♂, autosomes 1 and 24 homozygous unfused e ♀, autosomes 1 and 24 heterozygous for fusion, 1 replicate of autosome 26 lost (from Dutton’s unpublished MSc thesis) f, g ♂, Corsica, autosomes 1 and 24 heterozygous for fusion f plain g C-banded. Shown as fig. 3j, k by Angus (2010a) h–j Morocco, Moyen Atlas h ♀, plain, complete, autosomes 1 and 24 heterozygous for fusion i, j ♂, lacking 9 autosomes (positions indicated by solid circles), autosomes 1 and 24 heterozygous for fusion (unfused autosome 1 missing) i plain j C-banded. Shown as fig. 3o–q by Angus (2010b) k ♀ paratype, France, upper Maritime Alps (Hautes Alpes), Lac du Lauzet Superieur, C-banded, autosomes 1 and 24 heterozygous for fusion. Shown as fig. 2m by Dutton and Angus (2007). Scale bar: 5 µm.