Ursus maritimus tyrannus, Tyrant polar bear
Ursus maritimus tyrannus (meaning tyrant polar bear) is an extinct subspecies of polar bear, known from a single fragmentary ulna found in the gravels of the Thames at Kew Bridge, London. It was named by the Finnish paleontologist Björn Kurtén in 1964 and is interpreted to represent a relatively large subadult individual: the ulna is estimated to have been 48.5 cm (19 in) long when complete, for comparison, modern subadult polar bear ulnae are 36–43 cm (14–17 in) long.Show More
An unpublished reinvestigation of the fossil suggests that the fossil is actually a brown bear.Show Less
A carnivore meaning 'meat eater' is an organism that derives its energy and nutrient requirements from a diet consisting mainly or exclusively of a...
Among animals, viviparity is the development of the embryo inside the body of the parent. The term 'viviparity' and its adjective form 'viviparous'...