Complex sentence: It lived in the Upper Jurassic (Kimmeridgian, about 145 million years ago) and its fossil remains have been found in Portugal, in the famous field Guimarota.
Split into simpler sentences: It lived in the Upper Jurassic (Kimmeridgian, about 145 million years ago). Its fossil remains have been found in Portugal, in the famous field Guimarota.