Linked from
The 11 pages that link to Aldose, each with the reason it gives.
Sugar alcoholBroader topic: Reducing an aldose’s aldehyde group commonly produces an alditol.
GlyceraldehydeNarrower topic: Glyceraldehyde is the smallest member of this sugar family.
ErythroseNarrower topic: Erythrose belongs to this class because its carbonyl is terminal.
ThreoseNarrower topic: Threose belongs to this class because its open-chain form has an aldehyde.