How to pronounce“ctenophores”in English

The cnidarians and the ctenophores formed trace fossils in the pre-Cambrian ooze.

They think that ctenophores evolved really quickly— basically, their gene sequences changed more rapidly over time than those of sponges, and that’s throwing off the evolutionary models that are used to reconstruct the big

These first sponge fossils share a lot of features with… ctenophores.

So, if ctenophores were the first animal lineage to spit off then it’s not entirely clear what came before them.

Comb jellies, or ctenophores, are also pretty simple, although not as much as sponges because they actually have a basic nervous system.

And if Ctenophores came up with a nervous system all on their own, it leads to some interesting questions about who were the first animals to diverge from the rest.

For example, it would mean that ancient sponges probably had a more complex nervous system like Ctenophores in the past, but lost it at some point.