Tormus, SHARP, 1884

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 TORMUS SHARP, 1884

( FIG. 3I–M )

Material examined: Tormus helmsi Sharp, 1884: 1 female (NMPC): New Zealand: Buller ( BR) Tobins Bridge at Hwy. 7 (11.6 km NWW of Springs Junction), 42.29202°S 172.05333°E, 527 m, 3.xii.2016, M. Fikáček & M. Seidel lgt. ( MM51 ) .

Tormus posticalis (Broun, 1917) : 1 male ( NMPC): New Zealand , Westland ( WD), Stream at Jackson River Rd., Red Hill area, 44°07.41’S 168°32.87’E, 150 m, 7.xii.2017, sifting dry moss, M. Fikáček, D. Sadílek & V. Sýkora lgt. (2017- NZ 73) .

Karyotype: 2 n = 16 + Xy p (♂). All autosomes and the X chromosome are metacentric. Autosomal pairs 1 and 2 are distinctly longer than the others which decrease in length gradually.

TRIBE HYDROBIUSINI

Figures

Figure 3. Karyotypes of the Laccobiini, without treatment. A–H, Paracymus: (A–B) Paracymus aeneus, mitotic metaphase from midgut; (C–D) Paracymus scutellaris (C, spermatogonial mitosis, metaphase; D, mitotic metaphase from midgut.); (E–G) meiotic metaphase I from testes (E, Paracymus aeneus; F–G, Paracymus scutellaris). I–M, Tormus, mitotic metaphase from midgut: (I, K) Tormus posticalis; (J, L) Tormus helmsi. Habitus figures: (G) Paracymus scutellaris; (M) Tormus helmsi, from Fikáček et al. (2013).