Noteropagus, D'ORCHYMONT, 1919

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 NOTEROPAGUS DʼORCHYMONT, 1919

( FIG. 14A–B, G )

Material examined: Noteropagus sp. : (unidentified species illustrated in Fig. 14G ). 1 male (NMPC): Taiwan: Nantou County, Yushan National Park, Dongbu Scenic Area, Dong Bu 5.4 km SE of Heshe, rotten banana trunks on the margin of a village, 23.5610°N 120.93044°E, 15.v.2018, M. Fikáček, W.-R. Liang, H.-C. Liu & Y. Minoshima lgt. (2018-TW33).

Karyotype: 2 n = 22. Two nuclei from testis show probably the meiotic metaphase I with 11 bivalents. The sex bivalent cannot be recognized, although the smallest element in Figure 14A appears asymmetrical. The remaining bivalents suggest that the autosomes are all more or less similar in size.

Figures

Figure 14. Karyotypes of the Omicrini and Sphaeridiini, without treatment. A–F, Omicrini: (A–B) Noteropagus sp. from Taiwan, meiotic karyotypes from testes; (C–D) Omicrogiton insularis, mitotic karyotype, midgut; (E–F) Paromicrus sp. from Taiwan, mitotic karyotype, midgut. G–I, habitus of examined specimens: (G) Noteropagus sp.; (H) Omicrogiton insularis; (I) Paromicrus sp. J–P, Sphaeridiini: Sphaeridium; (J–K) Sphaeridium lunatum (J, testes, mitosis; K, midgut, mitosis); (L) Sphaeridium scarabaeoides, mitosis, midgut; (M) Sphaeridium bipustulatum, mitosis, midgut; (N–P) meiosis, metaphase I, testes: (N) Sphaeridium scarabaeoides; (O) Sphaeridium bipustulatum; (P) Sphaeridium lunatum. Q, habitus of Sphaeridium scarabaeoides.