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Gorgosaurus libratus

Taxonomy

Gorgosaurus libratus was named by Lambe (1914). Its type specimen is NMC 2120, a partial skeleton, and it is a 3D body fossil. Its type locality is RTMP Quarry 36, Berry Creek, which is in a Campanian channel lag sandstone in the Dinosaur Park Formation of Canada. It was considered monophyletic by Currie (2000).

It was recombined as Albertosaurus libratus by Russell (1970), Kurzanov (1976), Lawson (1976), Molnar (1978), Baird and Horner (1979), Molnar (1980), Gauthier (1986), Paul (1988), Mader and Bradley (1989), Lucas et al. (1990), Molnar (1991), Carpenter (1992), Novas (1996), Carr (1999), Foster and Chure (2000) and Turner et al. (2007).

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Synonyms

Laelaps incrassatus was named by Hay (1902). It is not extant. Its type specimen is AMNH 3962.

It was recombined as Dryptosaurus incrassatus by Hay (1902), Lambe (1903), Lambe (1904), Stromer (1915), Stromer (1931), Stromer (1934) and Steel (1970); it was synonymized subjectively with Deinodon horridus by Matthew and Brown (1922); it was synonymized subjectively with Albertosaurus sarcophagus by Russell (1970), Paul (1988), Carpenter (1992) and Eberth et al. (2001); it was synonymized subjectively with Gorgosaurus libratus by Holtz (2004).
Laelaps falculus was named by Hay (1902). It is not extant. Its type specimen is AMNH 3959.

It was recombined as Dryptosaurus falculus by Hay (1902) and Steel (1970); it was synonymized subjectively with Gorgosaurus libratus by Holtz (2004).
Gorgosaurus sternbergi was named by Matthew and Brown (1922). It is not extant. Its type specimen is AMNH 5664. Its type locality is RTMP Quarry 6, Sand Creek (AMNH), which is in a Campanian channel sandstone in the Dinosaur Park Formation of Canada.

It was synonymized subjectively with Albertosaurus libratus by Russell (1970) and Paul (1988); it was recombined as Albertosaurus sternbergi by Mader and Bradley (1989); it was synonymized subjectively with Gorgosaurus libratus by Holtz (2004) and Currie (2005).
Laelaps hazenianus was named by Hay (1902). It is not extant. Its type specimen is AMNH 3957.

It was recombined as Dryptosaurus hazenianus by Hay (1902) and Steel (1970); it was synonymized subjectively with Deinodon horridus by Matthew and Brown (1922); it was synonymized subjectively with Gorgosaurus libratus by Holtz (2004).
Dryptosaurus kenabekides was named by Hay (1899). It is not extant. Its type specimen is ANSP 9530.

It was synonymized subjectively with Deinodon horridus by Matthew and Brown (1922); it was synonymized subjectively with Gorgosaurus libratus by Holtz (2004).

Synonymy list

Year	Name and author
1876	Laelaps falculus Cope
1876	Laelaps incrassatus Cope
1876	Laelaps falculus Cope p. 249
1876	Laelaps incrassatus Cope p. 341
1876	Laelaps hazenianus Cope p. 343
1876	Laelaps falculus Cope p. 344
1877	Laelaps falculus Cope p. 572
1877	Laelaps hazenianus Cope p. 572
1877	Laelaps incrassatus Cope p. 572
1892	Laelaps incrassatus Cope p. 240
1899	Dryptosaurus kenabekides Hay
1899	Laelaps incrassatus Lambe p. 69
1902	Laelaps incrassatus Hay pp. 248-249
1902	Laelaps falculus Hay p. 249
1902	Laelaps hazenianus Hay p. 343
1902	Dryptosaurus falculus Hay p. 488
1902	Dryptosaurus hazenianus Hay p. 488
1902	Dryptosaurus incrassatus Hay p. 488
1902	Dryptosaurus kenabekides Hay p. 488
1902	Laelaps incrassatus Lambe p. 27
1903	Dryptosaurus incrassatus Lambe p. 133
1904	Dryptosaurus incrassatus Lambe p. 5
1914	Gorgosaurus libratus Lambe p. 5
1915	Dryptosaurus incrassatus Stromer p. 4
1917	Gorgosaurus libratus Lambe pp. 1-4
1922	Gorgosaurus sternbergi Matthew and Brown
1922	Gorgosaurus libratus Matthew and Brown p. 377
1922	Gorgosaurus sternbergi Matthew and Brown p. 378
1926	Gorgosaurus libratus Huene p. 101
1930	Gorgosaurus libratus Russell p. 148
1930	Gorgosaurus sternbergi Russell p. 148
1931	Dryptosaurus incrassatus Stromer p. 9
1931	Gorgosaurus libratus Stromer p. 9
1934	Gorgosaurus libratus Stromer p. 16
1934	Dryptosaurus incrassatus Stromer p. 55
1946	Gorgosaurus libratus Gilmore pp. 16-17
1946	Gorgosaurus sternbergi Gilmore p. 17
1964	Gorgosaurus libratus Russell p. 12
1964	Gorgosaurus sternbergii Russell p. 12
1964	Gorgosaurus libratus Walker p. 111
1964	Gorgosaurus sternbergi Walker p. 111
1970	Albertosaurus libratus Russell pp. 5-6
1970	Dryptosaurus falculus Steel p. 31
1970	Dryptosaurus hazenianus Steel p. 31
1970	Dryptosaurus incrassatus Steel p. 31
1970	Dryptosaurus kenabekides Steel p. 31
1970	Gorgosaurus libratus Steel p. 41
1970	Gorgosaurus sternbergi Steel p. 41
1974	Gorgosaurus libratus Molnar p. 1011
1976	Albertosaurus libratus Kurzanov
1976	Albertosaurus libratus Lawson p. 161
1978	Albertosaurus libratus Molnar p. 76
1979	Albertosaurus libratus Baird and Horner p. 9
1980	Albertosaurus libratus Molnar p. 103
1986	Albertosaurus libratus Gauthier p. 9
1987	Gorgosaurus libratus Currie p. 52
1987	Gorgosaurus sternbergi Currie p. 55
1988	Albertosaurus libratus Paul p. 329
1989	Albertosaurus libratus Mader and Bradley p. 48
1989	Albertosaurus sternbergi Mader and Bradley p. 48
1990	Albertosaurus libratus Lucas et al. p. 346
1991	Albertosaurus libratus Molnar p. 166
1992	Albertosaurus libratus Carpenter p. 258
1995	Gorgosaurus libratus Carr p. 21A
1996	Albertosaurus libratus Novas p. 676
1999	Albertosaurus libratus Carr pp. 498-499
1999	Gorgosaurus libratus Norell and Makovicky p. 26
2000	Gorgosaurus libratus Currie p. 448
2000	Albertosaurus libratus Foster and Chure p. 8
2001	Gorgosaurus libratus Eberth et al. p. 58
2001	Gorgosaurus libratus Holtz, Jr. pp. 69-70 fig. 7.2
2003	Gorgosaurus libratus Currie p. 654
2003	Gorgosaurus libratus Currie et al. p. 231
2003	Gorgosaurus libratus Rauhut p. 43
2004	Gorgosaurus libratus Holtz, Jr. p. 112
2005	Gorgosaurus libratus Currie p. 5
2006	Alberytosaurus libratus Malkani p. 8
2006	Gorgosaurus libratus Urban and Lamanna p. 234
2007	Albertosaurus libratus Turner et al. p. 26

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