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Há 18 horas · Other artiodactyl research McKenzie et al. (2024) describe new fossil material of tetraconodontines and suine suids from the Vallesian site of Castell de Barberà ( Spain ), and interpret the studied fossils as indicating that Parachleuastochoerus valentini is a distinct species, and indicating that Versoporcus grivensis is a junior synonym of V. steinheimensis .
Há 18 horas · An adult narwhal is typically 3.0 to 5.5 m (9.8 to 18.0 ft) in length and 800 to 1,600 kg (1,800 to 3,500 lb) in weight. Carl Linnaeus scientifically described the species in his 1758 work Systema Naturae . The narwhal inhabits Arctic waters, and is vulnerable to predatory attacks from polar bears, orcas and humans.
