The karyotype of Eretmapodites quinquevittatus consists of 1 metacentric and 2 submetacentric pairs (2n=6). The average length of late metaphase chromosomes are: I=8.1 mm, II=8.3 mm, III=9.6 mm, with average arm ratios of I=1.159, II=1.000, III=1.155. Somatic pairing is exhibited by the mitotic chromosomes. A secondary constriction is found in one of the larger pairs.