Tag

Carcinization

All articles tagged with #carcinization

science17 days ago•8 min saved

Crabs’ Sideways Walk Traced to a Single Ancient Twist

A large comparative study of 50 true crab species, combined with a crab-wide phylogeny, shows sideways locomotion likely originated only once around 200 million years ago in the early Jurassic, at the base of Eubrachyura, suggesting a predator-evading advantage and contributing to the ecological success of true crabs, while noting this behavioral shift is rarer than repeated body-shape convergence and may have been influenced by Triassic–Jurassic environmental changes.

via SciTechDaily|

#carcinization #evolution #jurassic-period

science27 days ago•39 min saved

Crabs’ Signature Sideways Shuffle Traced to a Single Evolutionary Leap

New research shows that true crabs acquired their iconic sideways walk in a single ancestral event around 200 million years ago, a shift that likely gave them a defensive edge and spurred their broad diversification; some species later evolved to move forwards, but this came from the sideways lineage rather than a repeated, independent origin.

via Yahoo|

#carcinization #crabs #evolution

science28 days ago•5 min saved

One Evolution, One Gait: The Crab Walk That Shaped True Crabs

Researchers find that true crabs acquired their distinctive sideways gait from a single ancestral event about 200 million years ago, likely aiding predator avoidance and rapid diversification, while crab-like body forms (carcinization) evolved repeatedly in other decapods; the study notes limitations such as using one specimen per species and questions about the classification boundary.

via ScienceAlert|

#carcinization #crabs #evolution

science4 months ago•4 min saved

Animals Evolved into Crabs Five Times, Scientists Still Uncertain Why

Scientists have found that crab-like bodies have evolved independently at least five times in crustaceans, driven by similar environmental pressures and internal anatomical changes, a phenomenon known as carcinization, which involves predictable morphological adaptations across different lineages.

via Earth.com|

#carcinization #convergent-evolution #crabs

science2 years ago•2 min saved

Crab-like Evolution: Decoding Carcinization's Trend

Evolutionary trend known as carcinization has led to various species independently evolving crab-like forms. Convergent evolution has resulted in similar features evolving in species from different periods or regions, despite lacking a common ancestor with those features. The advantage of the crab shape includes improved walking, burrowing, and climbing abilities, as well as reduced vulnerability to predators.

via IFLScience|

#adaptation #carcinization #convergent-evolution

science2 years ago•4 min saved

The Mysterious Continuation of Crab Evolution.

The evolution of crabs has resulted in the development and loss of crab-like features at least five times in the past 250 million years, a phenomenon known as carcinization. The reasons for this repeated evolution of the crab-like body plan remain a mystery, but studying crabs provides an opportunity to understand convergent evolution and predict the shapes that evolution might make based on environmental factors and genetic cues. Taxonomists are steadily piecing together what makes a crab, a crab, and resolving the multiple origins and losses of crab body forms through time.

via ScienceAlert|

#biodiversity #carcinization #crabs

science3 years ago•4 min saved

The Evolutionary Mystery of Crab-Like Animals.

The crab-like body plan has evolved at least five separate times among decapod crustaceans, a group that includes crabs, lobsters and shrimp. Scientists don't know for sure why animals keep evolving into crab-like forms, but they have lots of ideas. The crab-like body plan has emerged many times among very closely related animals, which means that evolution is flexible and dynamic. The fact that the trait is advantageous for the species is a sign that it sticks around through generations, which is the basic principle of natural selection.

via Livescience.com|

#carcinization #crabs #decapod-crustaceans

science3 years ago•4 min saved

The Evolutionary Mystery of Crab-Like Animals.

The crab-like body plan has evolved at least five separate times among decapod crustaceans, a group that includes crabs, lobsters and shrimp. This phenomenon is called carcinization, an example of convergent evolution. Scientists have many ideas but are not sure why animals keep evolving into crab-like forms. The crab-like body plan has emerged many times among very closely related animals, indicating that evolution is flexible and dynamic. The crab body plan might leave more flexibility for animals to evolve specialized roles for their legs beyond walking, allowing crabs to easily adapt to new habitats.

via Yahoo Life|

#carcinization #crabs #decapod-crustaceans