Ceutorhynchus klementzorum Korotyaev, 1980

Korotyaev, B. A., 2020, A review of weevils of the genus Ceutorhynchus (Coleoptera: Curculionidae), associated with woodland draba, Draba nemorosa (Brassicaceae), Zoosystematica Rossica (China) 29 (2), pp. 353-367 : 358

Ceutorhynchus klementzorum Korotyaev, 1980

( Figs 4, 14)

Distribution. Irkutsk Prov., Buryatia, Zabaikalskiy Terr., Mongolia ( Korotyaev, 1980, 2019).

Hosts. Draba nemorosa in ruderal flood-plain localities at the Khilok and Chikoy rivers together with C. seniculus ( Korotyaev, 2019) .

Ceutorhynchus sp. [? C. unguicularis C. G. Thomson, 1871 ]

( Figs 5, 9, 15, 21)

Material. Russia, Central Yakutia, Lena-Vilyui interfluve, km 29 of Vilyui Hwy near Yakutsk, “Suntar” Alas, motley-grass meadow, 28.V.2013, S.N. Nogovitsyna leg., 1 male .

Distribution. Southern East Siberia: southern Krasnoyarsk Terr., Yermakovskii Distr.; Tuva: southern slope of the West Sayan Mts and East Tuva Plateau ( Korotyaev, 1992, 2019), Central Yakutia (new record); Eastern Kazakhstan ( Korotyaev, 2019).

Hosts. Draba nemorosa and D. sibirica in southern Krasnoyarsk Terr. and in Tuva ( Korotyaev, 2019); both plants occur also in Central Yakutia ( Zakharova et al., 2005) where the small (1.5 mm long) male was collected in the period of their flowering.

Note. The Siberian form is slightly but usually noticeably different from the European specimens of C. unguicularis in the slightly shorter antennal club, shorter rostrum, shorter, more robust and more strongly rounded at sides elytra with more angular preapical prominences ( Korotyaev, 1980: 160 – “a female from Tuva of an uncertain identity”). Specimens of C. unguicularis from Krasnodar Terr. and Adygea have broad-lanceolate white scales sparsely scattered over the elytral disc, which is never found in the specimens from Siberia and Kazakhstan. This form differs more strongly in the bionomics; I did not find it on Turritis borealis in southern Krasnoyarsk Terr. in June 1979 when I went there to collect additional material to the single female brought shortly before that by E. Zemlyakova of the Moscow State University but collected in numbers on Draba nemorosa and D. sibirica belonging to a different tribe ( Alysseae ) and dissimilar morphologically, with sharply different fruit structure. I also failed to find C. unguicularis in Apsheronsk Distr. of Krasnodar Terr. at an elevation of about 1200 m a.s.l. and collected this species on Turritis borealis only in the piedmont forest near Kaluzhskaya Vill. in Krasnodar Terr. and at an elevation of about 700 m S of Novoprokhladnoye Vill. in the Republic of Adygea. In Europe ( Dieckmann, 1972; Alonso-Zarazaga et al., 2017) C. unguicularis is distributed from Ireland, Sweden and Finland in the north to Italy and Greece in the south and is associated mostly with T. borealis ( Dieckmann, 1972; as Arabis hirsuta ). At the eastern boundary of Europe in the east of the Russian Plain this species lives mostly on Schivereckia hyperborea of the tribe Alysseae ( Isaev, 2007; Dedyukhin, 2016), and less often, on T. borealis ( Dedyukhin, 2016) . The long series from Bashkortostan taken by S. V. Dedyukhin from Sch. hyperborea , has no broad-lanceolate white scales on the elytral disc except along suture and behind scutellum.