Figure 1 in Nikolaj Livanow's historical collection sheds new light on potential local extinctions and host association in Hirudinea

Figure 1. Cabinet with the historical Hirudinea collection in the EEZM – Edward Eversman Zoology Museum and Herbarium, Kazan (Volga Region) Federal University (formerly Zootomy Cabinet Museum of the Imperial Kazan University), prepared by Nikolaj A. Livanow and Eduard A. Meyer. The red numbers indicate exposition vials with samples of Acanthobdella peledina Grube, 1851 (1), Hirudo medicinalis Linnaeus, 1758 (2), and Glossiphonia grubei (Lukin & Epshtein, 1959) (3). Photo: T. A. Eliseeva and A. V. Bespyatykh.