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The first dinosaur butthole ever discovered is shedding light where the sun don't shine. The discovery reveals how dinosaurs used this multipurpose opening — scientifically known as a cloacal vent — for pooping, peeing, breeding and egg laying.
The dinosaur's derrière is so well preserved, researchers could see the remnants of two small bulges by its "back door," which might have housed musky scent glands that the reptile possibly used during courtship — an anatomical quirk also seen in living crocodilians, said scientists who studied the specimen.
Although this dinosaur's caboose shares some characteristics with the backsides of some living creatures, it's also a one-of-a-kind opening, the researchers found. "The anatomy is unique," study lead researcher Jakob Vinther, a paleobiologist at the University of Bristol in the United Kingdom, told Live Science. It doesn't quite look like the opening on birds, which are the closest living relatives of dinosaurs. It does look a bit like the back opening on a crocodile, he said, but it's different in some ways. "It's its own cloaca, shaped in its perfect, unique way," Vinther said.
The well-preserved booty belongs to the dinosaur Psittacosaurus, a bristly tailed, Labrador-size, horn-faced dinosaur, meaning it was a relative of Triceratops. Like its famous tri-horned cousin, Psittacosaurus lived during the Cretaceous period, which lasted from about 145 million to 65 million years ago. Previously, Vinther and his colleagues had studied this Psittacosaurus specimen, found in China, to determine its skin color, and at the time, he noted that its nether regions were preserved.
None of the reproductive soft tissues (like a penis) were preserved. So the researchers can't say whether the dinosaur was male or female. Even so, this dinosaur likely had copulatory sex, unlike some birds that bump butts when they do a "cloacal kiss" during reproduction, Vinther said.
To get a more complete picture of Psittacosaurus' cloacal vent, Kelly compared it with those of living land vertebrates. The vent is the opening, and the cloaca, which comes from the Latin word for "sewer," is the muscular chamber behind it. Based on its preserved anatomy, the opening could have been either horizontally oriented, like a bird's, or vertically oriented, like a crocodile cloaca, she said.
originally posted by: jhn7537
a reply to: dug88
Not gonna lie... when i came onto ATS today, "1st preserved dinosaur butthole" was not one of the topics i was guessing to come across, but here we are... haha
S&F for not being political topic!
originally posted by: IAMTAT
Smart toilet' grant flushes $6.9M away, Rand Paul says
“Each user of the toilet is identified through their fingerprint and the distinctive features of their anoderm, and the data are securely stored and analysed in an encrypted cloud server,” the abstract noted.
Seung-min Park, a senior research scientist at Stanford University, wrote in a blog post that the notion of an anal print was first thought of by artist Salvador Dali, who found that “the anus has 35 or 37 creases, which are as unique as fingerprints."
originally posted by: cooperton
Just another piece of evidence that shows dinosaurs are not millions of years old. Use your common sense on this one.
more proof dinosaurs aren't as old as we're told