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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".
Porcelain crabs are an example of carcinisation, whereby a noncrab-like animal (in this case a relative of a squat lobster) evolves into an animal that resembles a true crab. [5] [6] Porcelain crabs can be distinguished from true crabs by the apparent number of walking legs (three instead of four pairs; the fourth pair is reduced and held ...
Petrolisthes cabrilloi, also known as the Cabrillo porcelain crab, is a species of crab. [1] Native to the Pacific coast of North America, it was first described to science by Steve Glassell in 1945. [2] [3] Its range is believed to be from Morro Bay to Baja California. [4]
Pisidia longicornis, the long-clawed porcelain crab, is a species of porcelain crab that lives in the north-eastern Atlantic Ocean. It varies from reddish to white, and grows to a carapace width of 1 cm (0.4 in). It was first named by Carl Linnaeus in 1767, although the etymology remains unclear.
It displays an extreme form of carcinisation – evolution of a crab-like form – referred to as "hypercarcinisation". [2] In contrast to other porcelain crabs, A. spinifrons shows sexual dimorphism of the pleon (abdomen), closely resembling the situation in true crabs . [ 2 ]
Porcellana platycheles, the broad-clawed porcelain crab, is a species of porcelain crab from the family Porcellanidae. It is found on the coasts of the eastern ...
He worked extensively on crabs and similar animals, and coined the term "carcinisation" to describe "one of the many attempts of Nature to evolve a crab". [4] He is commemorated in the scientific names Metapenaeopsis borradaili , Athanas borradailei , Corallianassa borradailei , Accalathura borradailei and Petrolisthes borradailei .
Petrolisthes cinctipes is a species of marine porcelain crab found in the eastern Pacific Ocean, from British Columbia to Mexico. [1] This species was first described by John Witt Randall in 1840. [ 2 ]