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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".
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
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Cyclida (formerly Cycloidea, and so sometimes known as cycloids) is an extinct order of crab-like fossil arthropods that lived from the Carboniferous to the Jurassic and possibly Cretaceous. Their classification is uncertain, but they are generally interpreted as crustaceans, likely belonging to the superclass Multicrustacea .
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]