Hydrochara, BERTHOLD, 1827

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 HYDROCHARA BERTHOLD, 1827

( FIG. 6D–H, L )

Material examined: Hydrochara caraboides (Linnaeus, 1758) : 2 spec. ( BMNH): Greece, Corfu , R . Angus lgt.; 1 spec. ( BMNH): Germany, Hamburg, R . Angus lgt. (BMNH).

Hydrochara flavipes (Boheman, 1851) : 2 spec. ( BMNH): Spain, Cáceres , Abadia, 12.v.1990, R . Angus lgt. (BMNH).

Karyotype: 2 n = 28 + Xy (♂). The chromosomes showing a gradual decrease in length, the longer

chromosomes about 8 µm long, the shorter about 3µm. Centromeric C-bands small but well-developed.

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).