Late Cretaceous

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New Species of Enormous Mosasaur is Described

A newly named giant Tylosaurus species has been named by researchers.  The new species of Tylosaurus has been erected based on fossils found in northern Texas. This enormous predator ruled the ancient seas around 80 million years ago (Campanian faunal stage of the Late Cretaceous).  The scientific paper was published in the Bulletin of the American

26/05/2026 everythingdinosaur

Gongshuilong: Beast of the Week

 Today we're checking out a recently described hadrosaur with a unique look, Gongshuilong fanwei!Gongshuilong lived in what is now eastern China, during the late Cretaceous period, between 68 and 66 million years ago.  From beak to tail it measured about 23 feet (7m) long and would have been a plant-eater when alive.  The genus name translates from Mandarin to "Gong River Dragon" in reference to the Gong River near where its bones were discovered.Gongshuilong life reconstruction in watercolors b

10/05/2026 prehistoricbeastoftheweek

Mexidracon: Beast of the Week

 This week we will be taking a look at a unusual theropod.  Check out Mexidracon longimanus!Mexidracon was a theropod dinosaur that lived in what is now Coahuila, Mexico, during the late Cretaceous period, about 72 million years ago.  From beak to tail it measured about 10 feet (3m) long.  Its genus name translates to "Mexican Dragon" and its species name to "long hand".  It may have been a plant-eater when alive or possibly eaten a mix of both plants and meat.  Mexidracon life reconstruction in

03/05/2026 prehistoricbeastoftheweek

Elasmosaurus: Beast of the Week

 This week we will be checking out a sea beast who's proportions were so outrageous, it confused even scientists! Check out Elasmosaurus platyurus.Elasmosaurus was a large reptile that lived in he sea that covered what is now central part of the United States during the late Cretaceous period, between 80 and 77 million years ago.  From snout to tail it would have measured about 34 feet (7.1m) and would have eaten meat when alive.  Its genus name translates to "plate reptile" in reference to how

29/03/2026 prehistoricbeastoftheweek

Spinosaurus: Beast of the Week

Make way (lots of room...back up more...keep going...keep going...backbackbackback) for the mighty Spinosaurus Aegyptiacus! Spinosaurus was a meat-eating dinosaur that lived in what is now Africa, including Egypt, Morocco, and Niger during the late Cretaceous Period, about 97-95 million years ago.  It was a massive animal, the biggest known individuals possibly measuring 49 feet (about 15m) long from snout to tail as an adult, making it the longest meat-eating dinosaur known to science.  The gen

22/02/2026 prehistoricbeastoftheweek

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Cretaceous Period

Cenomanian

100.5000 – 93.9000

Turonian

93.9000 – 89.8000

Coniacian

89.8000 – 85.7000

Santonian

85.7000 – 83.6000

Campanian

83.6000 – 72.2000

Maastrichtian

72.2000 – 66.0000