The species has subsequently been referred to other genera. In 1970 Rodney Steel renamed it "Atlantosaurus alenquerensis", in 1978 George Olshevsky coined a "Brontosaurus alenquerensis". John Stanton McIntosh in 1990 proposed that it was a species of "Camarasaurus": "Camarasaurus alenquerensis". However, the find of another partial skeleton, ML 414, including a tooth and a hundred gastroliths, in co-eval strata near the town of Lourinhã in 1983, induced Pedro Dantas e.a. in 1998 to see the taxon as a distinct form from "Apatosaurus" and "Camarasaurus". He therefore named the separate genus "Lourinhasaurus". The type species is "Apatosaurus alenquerensis", the "combinatio nova" is "Lourinhasaurus alenquerensis". This is the only species in the genus. The genus name refers to the locality of the second skeleton. However, already in 1999 this second specimen was given a genus name of its own: "Dinheirosaurus".