Sternolophus, SOLIER, 1834

Angus, Robert B, Sadílek, David, Shaarawi, Fatma, Dollimore, Hayley, Liu, Hsing-Che, Seidel, Matthias, Sýkora, Vít & Fikáček, Martin, 2021, Karyotypes of water scavenger beetles (Coleoptera: Hydrophilidae): new data and review of published records, Zoological Journal of the Linnean Society 192 (3), pp. 958-958 : 958-

GENUS STERNOLOPHUS SOLIER, 1834

( FIG. 6I–K )

Material examined: Sternolophus solieri Castelnau, 1840: 1 male (BMNH): Egypt, surroundings of Cairo, 10 th Ramadan, R. Angus lgt.

Karyotype: 2 n = 16 + Xy (♂). Chromosomes 1–7 metacentric, 8 subacrocentric, with an even decrease in length along the karyotype. X chromosome is metacentric, as large as chromosome 1.

Note: Agarwal (1960a) provides a meioformula n = 8 + Xy p (♂) for Sternolophus rufipes (Fabricius, 1792) , which agrees with the data presented here.

Figures

Figure 6. Karyotypes of the Hydrophilini. A–C, Hydrophilus, mitotic karyotype from embryo (A–B, Hydrophilus piceus; C, Hydrophilus pistaceus). D–H, Hydrochara: (D–F) Hydrochara caraboides, mitotic karyotype, embryo; (G–H) Hydrochara flavipes, mitotic karyotype, midgut. I–J, Sternolophus solieri (I, male mitotic karyotype; J, meiotic first metaphase from testes). A, C, D, G, I, without treatment. B, E, F, H, C-banded. Habitus figures: (K) Sternolophus solieri; (L) Hydrochara caraboides; (M) Hydrophilus piceus, from Short & Fikáček (2013).