ⓘ Voiced retroflex implosive
The voiced retroflex implosive is a type of consonantal sound. It is not known to be phonemically distinct from alveolar /ɗ/ in any language. Sindhi has an implosive that varies between dental and retroflex articulation, while Oromo, Saraiki and Ngada have /ᶑ/ but not /ɗ/.
The symbol for this, ⟨ ᶑ ⟩ d and the tail for retroflex and the hook top for implosive, not explicitly approved by the MPA, but mentioned in the Handbook MPA.