Fig. 3. Giemsa-stained karyotypes.

a Karyotype of a male of the whale shark Rhincodon typus (2n = 102). b Karyotype of a male of the zebra shark Stegostoma fasciatum (2n = 102). c Karyotype of a male of the brownbanded bamboo shark Chiloscyllium punctatum (2n = 106). d Karyotype of a male of the whitespotted bamboo shark C. plagiosum (2n = 106). Asterisks indicate the positions of secondary constrictions. M metacentric chromosomes, SM submetacentric chromosomes, ST subtelocentric chromosomes, A acrocentric chromosomes. Scale bars represent 10 μm. See Supplementary Fig. 2 for female karyotypes and Supplementary Fig. 3 for metaphase spreads.