[D] Alectrosaurus olseni (1) [Su] [sG] [T]
Cretaceous Late ?Cenomanian Turonian Coniacian Santonian Campanian ? Maastrichtian
Saurischia Theropoda Tyrannosauria Tyrannosauridae Aublysodontinae
Iren Dabasu Formation, Nei Mongol Zizhqu, China; Baynshirenskaya Svita, Omnogov, Mongolia
Genus - Typespecies - Skull
See also Albertosaurus olseni
\\\\\\\"The unusually large size of the humerus and the enormously long claws are so unlike any known Upper Cretaceous deinodont as to at once set the animal off as a new type of theropod dinosaur.\\\\\\\" While most of the skeletal material originally described by Gilmore belongs to a medium-sized tyrannosaur, the large clawed forelimbs that inspired the name come from an unidentified segnosaur. Later discoveries have shown that Alectrosaurus had small forelimbs like other tyrannosaurs.
Skull and associated partial postcrania, fragmentary postcranial skeleton. Holotype: (AMNH 6554) two manual unguals(?), pubic foot fragment, femur, tibia (742 mm with astragalus), fibula lacking distal fifth (~675 mm), astragalus (77 mm wide), calcaneum, metatarsal I (72 mm), phalanx I-1 (88 mm), pedal ungual I (55 mm), metatarsal II (470 mm), phalanx II-1 (105 mm), phalanx II-2 (82 mm), pedal ungual II (82 mm), metatarsal III (486 mm), phalanx III-1 (108 mm), phalanx III-2 (82 mm), phalanx III-3 (65 mm), metatarsal IV (475 mm), phalanx IV-1 (77 mm), phalanx IV-2 (69 mm), phalanx IV-3 (52 mm), phalanx IV-4 (37 mm), pedal ungual IV (61 mm), metatarsal V (Gilmore 1933, Mader and Bradley 1989)