Albertosaurus = ?Deinodon (Leidy,1856) Albertosaurus > Albertosaurus incrassatus (Cope, 1876 vide Huene, 1932) >> Laelaps incrassatus (Cope,1876) ? Deinodon horridus ((Leidy,1856) ? Laelaps falculus (Cope,1876) ?Lealaps hazeniasus (Cope,1876) ?Dryptosaurus kenabekides (Hay,1899) Albertosaurus > A.sarcophagus (Osborn,1905) >> A. arctunguis (Parks,1928)

Possible subjective synonym of Daspletosaurus > D. torosus

In the 1970s, a major study of the family Tyrannosauridae concluded that Gorgosaurus and Albertosaurus were the same genus, and that the only differences between the two were suggested not only by comparisons of dissimilar growth stages, but also by variations between populations. Albertosaurus was named first, so according to the rules of biological nomonclature, its name had priority. However, recent work by Phillip Currie at the Royal Tyrrell Museum of Paleontology has shown that these two dinosaurs are, in fact, separate and valid genera. So, Albertosaurus libratus (Lambe,1914) = Gorgosaurus libratus (Lambe,1914) 
A. sternbergi (Matthew & Brown,1923 vide Russell, 1970) = Gorgosaurus sternbergi (Matthew & Brown,1923) 

Albertosaurus ("reptile from Alberta") is an North American tyrannosaurid. Its skull is very similar to that of Tyrannosaurus. It is massively built with smaller skull windows surrounded by thicker struts of bone. The teeth are sharp and recurved ( Pointing backwards), typical of a carnivore.

1 cf. Albertosaurus sp. "El Gallo" Formation, Estado de Baja, California Norte, Mexico Campanian Cretaceous Late

2 Albertosaurus sp. "Mesaverde" Formation, Wyomig, US Campanian Cretaceous Late

3 ? Albertosaurus libratus ( = Deinodon horridus ) Fruitland Formation, New Mexico, US Campanian Cretaceous Late

4 Albertosaurus sp.Fruitland Formation, New Mexico, US Campanian Cretaceous Late

5 Albertosaurus megagracilis Hell Creek Formation, Montana, US Maastrichtian Cretaceous Late

6 Albertosaurus sarcophagus Horseshoe Canyon Formation, Alberta, Canada Maastrichtian Cretaceous Late

7 Albertosaurus libratus Judith River Formation, Alberta, Canada Campanian Cretaceous Late

8 Albertosaurus libratus Judith River Formation, Montana, US Campanian Cretaceous Late

9 Albertosaurus sarcophagus Judith River Formation, Montana, US Campanian Cretaceous Late

10 ? Albertosaurus sp. Judith River Formation, Saskatchewan, Canada Campanian Cretaceous Late

11 Albertosaurus libratus Kirtland Shale, New Mexico, US Maastrichtian Cretaceous Late

12 ? Albertosaurus sarcophagus Lance Formation, Wyoming, US. Maastrichtian Cretaceous Late

13 Albertosaurus sp. Lance Formation, Wyoming, US. Maastrichtian Cretaceous Late

14 Albertosaurus sp. Moorville Chalk, Alabama, US Campanian Cretaceous Late

15 cf. Albertosaurus sp. Potomac Formation, New Yersey, US Cenomanian Cretaceous Late

16 ? Albertosaurus sp. St. Mary River Formation, Alberta, Canada Maastrichtian Cretaceous Late

17 Albertosaurus sp. Two Medicine Formation, Alberta, Canada Campanian Cretaceous Late

18 ? Tarbosaurus bataar ( = Albertosaurus periculosus ) Unnamed unit, Heilongjiang, China Cretaceous Late (unconfirmed)

19 Albertosaurus sp. Wapiti Formation, Alberta, Canada Campanian Maastrichtian Cretaceous Late