Hyalomma marginatum Koch, 1844 (Fig. 12)

Material examined: Sakar Mts, NE of Balgarska Polyana Vill., 42°02'21.8"N 26°12'32.4"E, 410 m a.s.l., roadside xerophilic grasslands (Fig. 3), 25.v.2019, 2 ♂♂ (BFUS-ACR 000032, BFUS-ACR000033), on the ground, D. Gradinarov & Y. Petrova leg. ; Sakar Mts, SE of Knyazhevo Vill., 42°06'01.0"N 26°30'21.7"E, 102 m a.s.l., dirt road, riverine and xerothermic vegetation, 07.vi.2020, 1 ♀ (BFUS- ACR000034), on the ground, D. Gradinarov leg. ; the same locality, 24.v.2023, 1 ♀ (BFUS- ACR000035), on the ground, D. Gradinarov leg.; Sakar, W of Ustrem Vill., right bank of Manastirska Reka Riv., 42°01'25.8"N 26°27'06.8"E, 94 m a.s.l., riverine vegetation, 14.iv.2023, on the ground, 1 ♀ (BFUS-ACR 000036), D. Gradinarov leg.

Notes: This species is widespread in Bulgaria up to 1000 m a.s.l., being found in greater numbers in the southern regions of the country (Georgieva & Gecheva 2013). The species exhibits high ecological plasticity in its Palaearctic range (Estrada-Peñа et al. 2017). In Bulgaria, it is found in hilly areas and in the low mountain belt, often in shrublands and in xerothermic oak forests (Georgieva & Gecheva 2013).