What is "loxogrammoideae"

Loxogrammoideae is a small subfamily of the Polypodiaceae family of ferns. It contains the two genera Dictymia and Loxogramme. This subfamily was previously considered to be a separate family (Loxogrammaceae ) and later as tribe of the Polypodioideae subfamily ( Loxogrammeae ). But recent molecular phylogenic studies place the group as a subfamily of Polypodiaceae.