Adolopus, 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 ADOLOPUS SHARP, 1884

( FIG. 12A–C )

Material examined: Adolopus sp. 1 : 4 males, 3 females (NMPC): New Zealand: Stewart Island , Northwest Circuit Tk. at Kaipipi Bay, rotten longs/twigs in sparse hardwood forest with tree ferns, 46°53.88’S 168°4.31’E, 20 m a.s.l., 21.i.2016, M. Seidel & M. Fikáček lgt. (2016- NZ 017) .

Adolopus sp. 2 : 1 male (NMPC): New Zealand, Waikato ( WO) , Pirongia Forest Park, Ruapane Link Track (lower part), 37.966°S 175.144°E, 235 m, 18– 21.xi.2016, M. Fikáček & M. Seidel lgt. ( MM02 ) .

Karyotype: 2 n = 22 + Xy (♂). In the Kaipipi Bay species ( Fig. 12B ), autosome pair 1 is the longest, and remaining autosomes gradually decrease in length so that pair 11 is about a quarter of the length of pair 1. All autosomes are metacentric to submetacentric. The X chromosome is metacentric, about as long as autosome pair 5, and the Y chromosome is dotlike. Adolopus from Pirongia ( Fig. 12A ) differs from that of Kaipipi Bay by subacrocentric pairs 7–9 and the acrocentric X chromosome slightly longer than autosome pair 2.

Note: The identification of the examined specimens is impossible at the moment; however, the DNA data (Seidel, unpubl.) indicate that they represent two different species.

Figures

Figure 12. Karyotypes of the Cylominae, without treatment. A–B, Adolopus sp., mitosis from midgut. D, Cyloma guttulatus, mitosis from midgut. E–G, Cyloma sp. (E–F, meiotic first metaphase; G, testes, mitosis;). I–M, Cylomissus glabratus: (I–J) mitotic metaphase from midgut; (K–M) meiotic metaphase I from testes. Habitus figures: (C) Adolopus sp.; (H) Cyloma sp., specimen collected with karyotyped voucher; (N) Cylomissus glabratus, from Minoshima et al. (2015).