How are phosphoglycerides different from phospholipids? (Currently studying high-school Biochemistry)

I'm unable to distinguish between phospholipids and phosphoglycerides from their "definitions" (Courtesy: Wikipedia)

On phospholipids:



Which suggests that phospholipids necessarily contain a glycerol "bridge" that connects the fatty acid tail to the phosphate head. To me, this looks like,



On phosphoglycerides:



"Glycerol-based phospholipids"?! But aren't phospholipids already 'glycerol-based'?

If both phospholipids are glycerol-based, and if phosphoproteins are "glycerol-based phospholipids"...how are they any different?

What am I missing here?
Phospholipids of a lipid bilayer can be divided in to two groups:


Those derived from glycerol -  phosphoglycerides.
Those derived from sphingosine -  sphingomyelin.


Phosphoglycerides are indeed a type of phospholipid.