Systematic acarology and palaeoacarology: a special volume in memory of Ekaterina Alekseevna Sidorchuk (1981–2019) (Table of contents)

• ZHI-QIANG ZHANG⁺⁻
• TOBIAS PFINGSTL⁺⁻
• ROY A. NORTON⁺⁻
• SERGEI V. MIRONOV⁺⁻
• OWEN D. SEEMAN⁺⁻