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Ctenophore

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science1 year ago•2 min saved

Comb Jellies Defy Aging with Reverse Time-Travel Ability

Scientists have discovered that the ctenophore Mnemiopsis leidyi, a type of comb jelly, can reverse its development from an adult to a larval stage under stress, challenging traditional views on animal life cycles. This ability, similar to the 'immortal jellyfish' Turritopsis dohrnii, suggests that life cycle flexibility may be more common in the animal kingdom than previously thought. The findings, published in PNAS, open new research avenues in developmental biology and aging, highlighting the potential ancient origins of this trait.

via SciTechDaily|

#ctenophore #developmental-biology #life-cycle

science2 years ago•1 min saved

Oldest living creature on Earth identified, solving animal phylogeny problem.

Scientists have identified the oldest living creature on Earth as a jellyfish-like organism called a ctenophore or comb jelly, which first emerged up to 700 million years ago. The study also found that ctenophores are the closest relatives of the first animals and can still be found in oceans and aquariums today. Biologists have spent years trying to find out what the earliest animals were, and scientists gradually narrowed the possibilities down to two groups: sponges and comb jellies.

via BBC|

#animals #ctenophore #evolution

science2 years ago•2 min saved

Comb Jelly: Earth's Oldest Animal Group?

A new study published in Nature suggests that the first animal to have roamed the Earth about 700 million years ago was likely a comb jelly, or ctenophore. Scientists determined this by looking at the organization of genes in the chromosomes of the organisms. The chromosomes of the ctenophore look very different than the chromosomes of sponges, jellyfish and other invertebrates, alerting researchers that the ctenophore could have either come much earlier than the others, or much later. This new insight is valuable to learning about the basic functions of all animals and humans today, such as how we eat, move and sense our surrounding environment.

via CBS News|

#chromosomes #comb-jelly #ctenophore