. The superheavy isotope 258 Db was produced in the 209 Bi( 50 Ti, 1n) 258 Db reaction at GSI, Germany. A detailed α -spectroscopy study of this isotope and its α -decay daughter products was performed. Two long-lived α -decaying states in 258 Db are observed. A spin-parity of 0 - is tentatively assigned to the ground state for which a half-life of 2 . 17 ± 0 . 36 s is determined. Spins and parities of either 5 + or 10 - are proposed for the isomeric state found at an excitation energy of 51 keV with a half-life of 4 . 41 ± 0 . 21 s. The α -decay daughter isotope 254 Lr displays a similar behavior. A half-life of 11 . 9 ± 0 . 9 s is determined for the 254 Lr ground state which is tentatively assigned a spin-parity of 4 + . The isomeric level of this isotope placed at 108 keV with a half-life of 20 . 3 ± 4 . 2 s is tentatively assigned a spin-parity of 1 - . Two long-lived α -decaying states are observed in the granddaughter isotope 250 Md . The ground state has a half-life of 59 . 5 ± 9 . 1 s. A half-life of 42 . 4 ± 4 . 5 s is measured for the isomeric state positioned at an excitation energy of 123 keV. Partial, tentative level schemes for 254 Lr, 250 Md and 246 Es are proposed based on the α - γ coincidences.