If you ’ve been on the net for long enough , you ’ve probably come across the meme that - sooner or by and by - everything turn into crab .
According to the meme , sooner or afterwards - be you a Pisces the Fishes or Sean Penn - you are to become a Phthirius pubis . While this is of course just a fun exaggeration , it ’s base in some play phylogeny . For you see everything in nature ( well , thankfully just crustaceans ) seems to want to become a crab .
Yep , like technical school bros repeatedly trying to invent a new character of transferral andaccidentally reinvent the bus , evolution seems to keep spit out animals that look like crabs . First coined as a termin 1916 , carcinization was originally defined as " one of the many endeavor of nature to germinate a crab " .
Convergent evolution is when similar features evolve in species from unlike period or regions that have a standardised form or use , despite the last vernacular ancestor of the animals or plants not hold that particular feature article . guess how echolocation has evolved in both whales and bats , and mechanisms for flight of steps evolved in hoot , insects , pterosaurs , and bats . ( Get your own phylogenesis , bats , fall by the wayside hogging up everyone else ’s ) .
reckon also of how several dissimilar fauna have evolved bristly protusions , let in echidnas ( of the egg-laying mammal ) , porcupine ball ( gnawer ) and hedgehogs ( erinaceinae ) . Despite appearances , the last coarse ancestor of the three waslikely in the time of the dinosaurs , they just end up with similar characteristic .
Convergent evolution essentially happens when animate being and plant have to conform to similar environment or ecological niches and terminate up with similar solution . Crab - like form are thought to have go on independently at least five times in decapod crustaceans , include porcelain crabs , haired stone crabs , andcoconut Crab .
As the TV above explains , a lot of matter you might reasonably call crabs ( because they look and act like , well , crabs ) are n’t actually crabs , they just " evolved into something that looked like crabs . Independently . Over and over again . "
During the cretaceous catamenia brute that looked more lobster - ilk in form became more squashed , and their humble back legs became long and more crablike . The vantage seems to be that the crab frame allows them to walk and tunnel more expeditiously , with some crabs that can even climb up trees thanks to the shape ( see the ugly main icon ) .
It ’s also possible that creatures with shorter tail segments survived more , due to both their manoeuvrability ( name above ) but also because it grant predators less to latch on to .
So until we know more , that ’s why everything wants to be a crabby person .
