Karyotypes of water scavenger beetles (Coleoptera: Hydrophilidae): new data and review of published records Author Angus, Robert B Author Sadílek, David Author Shaarawi, Fatma Author Dollimore, Hayley Author Liu, Hsing-Che Author Seidel, Matthias Author Sýkora, Vít Author Fikáček, Martin text Zoological Journal of the Linnean Society 2021 2021-07-01 192 3 958 958 https://academic.oup.com/zoolinnean/article/192/3/958/5930869 journal article 10.1093/zoolinnean/zlaa105 0024-4082 5301134 GENUS CYLOMISSUS BROUN, 1903 ( FIG. 12I–N ) Material examined: Cylomissus glabratus Broun, 1903: 1 male, 1 female (NMPC): New Zealand : Otago Lakes , Little Meg headwaters at Cardrona Skifield Rd. , stream collecting in small exposed streamlets (stony and mossy), 44°52.60’S 168°57.65’E , 1280 m , 5.xii.2017 , M. Fikáček , D. Sadílek & V . Sýkora lgt. (2017-NZ63). 1 male ( NMPC ): New Zealand : Stewart Island , Fern Gully W of Oban , at bridge over Mill Creek , 17–21.i.2016 , 46°53.52’S 168°6.00’E , 45 m , M. Seidel , V . Sýkora & M. Fikáček lgt. (2016- NZ 004) . Karyotype: 2 n = 22 + Xy ( ♂ ). Autosome pair 1 is 3–4 times the length of pair 2, whereas the remaining pairs have a gradual decrease in length along the karyotype, with pair 11 about half the length of pair 2, the X chromosome is only slightly longer than pair 11. The Y chromosome is dot-like. Examined specimens from both localities have a similar karyotype.