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The Cretaceous crab revolution was a major diversification event of brachyuran crustaceans (also known as true crabs) that took place during the Cretaceous period, from 145 to 66 million years ago. [ 1 ] [ 2 ] Nearly 80% of modern groups of crabs originated during this event. [ 3 ]
Carcinisation (American English: carcinization) is a form of convergent evolution in which non-crab crustaceans evolve a crab-like body plan. The term was introduced into evolutionary biology by L. A. Borradaile, who described it as "the many attempts of Nature to evolve a crab". [2]
High species diversification can be traced to the Jurassic and Cretaceous periods, which coincides with the rise and spread of modern coral reefs, a key habitat for the decapods. [3] Despite the inferred early origin, the oldest fossils of the group such as Palaeopalaemon only date to the Late Devonian. [4]
The tiny crab bridges an evolutionary gap that stumped scientists for years. Fossil stuck in 100 million-year-old amber is oldest "true crab" ever discovered Skip to main content
The Cretaceous Period of the Mesozoic Era See also the preceding Category:Jurassic and the succeeding Category:Paleogene Wikisource has original works on the topic: Mesozoic#Cretaceous
Seaweed and two chitons in a tide pool "A variety of marine worms": plate from Das Meer by M. J. Schleiden (1804–1881). The Mesozoic marine revolution (MMR) refers to the increase in shell-crushing (durophagous) and boring predation in benthic organisms throughout the Mesozoic era (251 Mya to 66 Mya), along with bulldozing and sediment remodelling in marine habitats. [1]
The Cretaceous is divided into Early and Late Cretaceous epochs, or Lower and Upper Cretaceous series. In older literature, the Cretaceous is sometimes divided into three series: Neocomian (lower/early), Gallic (middle) and Senonian (upper/late). A subdivision into 12 stages, all originating from European stratigraphy, is now used worldwide. In ...
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