(en) Olivier Rieppel, Mesozoic Sea Dragons : Triassic Marine Life from the Ancient Tropical Lagoon of Monte San Giorgio, Indiana University Press, , 312 p. (ISBN978-0-253-04013-8, lire en ligne), "In fact, Macrocnemus is a typical example of a protorosaur (prolacertiform) as currently understood, that is, part of clade that represents a basal branch of archosauromorph reptiles."