Reasoning recorded at review

• •Opaque white body
• •Thin black outer line around the mantle and parapodial edge
• •Orange-yellow band immediately inside the black line
• •Elongate Chelidonura head-shield body with paired posterior extensions

Alternatives considered

• Chelidonura electra

  Why plausible: Another white Chelidonura formerly considered a possible colour form

  Comparison: C. electra has a yellow edge but lacks the outer black line that is clearly visible here