Book reviewer, cat photographer, fanzine editor, map blogger, snake whisperer.

Tag: Gorgosaurus

Tyrannosaurs Were Multiniche Predators

Albertosaurus diorama
Albertosaurus diorama, Royal Tyrell Museum, 27 Dec 2008.

Riley Black, writing for Smithsonian magazine, reports on new findings that tyrannosaurs dominated their ecosystems because juveniles and adolescents operated in different ecological niches. “The differences between adult and adolescent tyrannosaurs were so great that the animals almost lived like different species, pushing out mid-sized carnivores in a prehistoric takeover.” So instead of smaller carnivorous dinosaurs hunting smaller prey, you had younger tyrannosaurs.

The Unfeathered Tyrannosaur

Ever since tyrannosauroid fossils (namely, Dilong and Yutyrannus) started turning up with evidence of feathers, the idea that the Big T and its close relatives were at least partially feathered themselves was awfully intriguing. I mean, basal coelurosaurs had feathers, early tyrannosauroids had feathers—it stood to reason. But a new study examining fossilized tyrannosaur skin impressions concludes that Tyrannosaurus and its close relatives Albertosaurus, Daspletosaurus, Gorgosaurus and Tarbosaurus had scaly skin rather than feathers. Size may be one reason why: large mammals are less hairy for heat-loss reasons (the exceptions being arctic dwellers like mammoths).

I admit to some disappointment: I was more invested in the idea of a feathered T. rex than I ought to have been.

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