This primitive, bag-like sea creature is our early human ancestor?!


The Saccorhytus Coronarius, which is your early human ancestor.

Our past as humans used to be shrouded in mystery, leaving theories, speculation, and debate rampant within the scientific community about our origins and how we evolved to fit into the Earth’s system. But now, thanks to the new discovery of some ancient microfossils, we have identified this primitive, bag-like creature as one of our earliest human ancestors!


Called the Saccorhytus Coronarius as its super fancy-schmancy scientific name, it describes how this sea creature is only one millimeter! With a humongous jaw that is forever dropped in awe, it had an expandable mouth sucked up food particles like nobody’s business. It was even able to eat larger creatures! Well, the ones that lived where in certain areas, and the most common one a shallow sea area that had mud and big grains of sand in the seabed that the Saccorhytus Coronarius was able to wriggle around in. This is a bit ironic, considering the microfossils were found on land in Shaanxi Province, China by researchers from the University of Cambridge in England, and the Northwest University of China in black speckles of the 3 tons of limestone they sifted through.


Under close inspection from a powerful microscope at the universities, the black speckles revealed that the millimeter-long Saccorhytus Coronarius had thin and wrinkled skin that allowed its huge mouth to expand and vacuum up food, as well as an elliptical shaped body with bilateral symmetry (which is basically an oval shaped creature that could be cut in half, with each side looking like the other). It may or may not have had musculature (which is the presence of a muscular system), as scientists have no definite proof, and can only make that conclusion based off of the earlier facts.


It also lacked a butt, which is also known scientifically and properly as an anus. So how did it get all of its waste, also known as its POOP, out of its body? Because if it didn’t, it would definitely die due to of all of the excess waste and toxins building up in its body, essentially killing from the inside out. Well, the researchers have found evidence of eight primitive gills that looked like cones. These gills would probably excrete excess water (as well as the disgusting stuff that goes along with it, aka PEE), but unfortunately…


Anything larger (LIKE THE POOP) would come straight back out of its mouth!


Just think. If you had to THROW UP your POOP, how utterly NASTY would that be?! It would definitely taste horrible… and some of the yucky stuff might stay as residue on the inside of its mouth! Disgusting!


It’s a good thing that they evolved into other, much more refined organisms! Like us, humans! But they also evolved into other diverse branches, such as sea squirts, starfish, sea urchins, and acorn worms.


You may be asking, “How could they have evolved into such different species? Unless we were secretly meant to be sea creatures living in harmony with the starfish?!!!” But the quick answer is no, no we weren’t. The reason why the Saccorhytus Coronarius was able to evolve into such diverse creatures is because it was a deuterostome. This means that they were distinguished from other types of animals because deuterostomes used embryos to develop their offspring. We, as humans, also use embryos to develop our offspring, and consequently, we are also deuterostomes, just like the Saccorhytus Coronarius.


It is widely known that deuterostomes evolved into many other diverse species, so it does make sense that they would eventually evolve into the intelligent and advanced species that we, humans, are today. KMS student Emily D. says that, “That’s pretty cool… weird knowing that were related to that thing, though!” Due to the discovery of the Saccorhytus Coronarius, scientists have been able to fill in missing pieces of the tree of life. Hopefully, they are able to figure out other mysteries due to this one being solved!