I have made the following image in paint, so forgive me if it isn't the most appealing sugar. I have a hard time visualizing how the following sugar is an aldose.
My speculation for the Fischer projection of the alleged carbohydrate is:
My speculation is as a result of the lack of primary alcohol at the end of traditional carbohydrates like D-glucose for example means that there is not carbon group alpha or beta to carbon 4 in the furanose ring. The fact that there is still a CHO group on Carbon 1 would make this sugar an aldose? Is this logic correct, and is that the Fischer projection for the sugar shown above in the Haworth projection?