Text The Ark was a small, two-room frame house located on the northeast side of Public Square. Media Images Happy the Haplocanthosaurus, ca. The Cleveland Museum of Natural History was the first to show it in It was first displayed on its side but was positioned straight a few years later. It was erected on the northeast corner of the square around as part of Leonard Case Sr.
Case's two sons hosted meetings there that included discussions about the latest scientific findings and inspections of animal specimens and other curiosities. The Ark was demolished in When the Ark's frame house was torn down in to build a new federal building on the northeast side of Public Square, the Arkites moved next door to Case Hall. It stood until when it too was demolished along with the federal building to construct a new Post Office as part of the Group Plan.
The new building created an opportunity for curating the exhibits in chronological order rather than by classifications like mammals. It's really a point of local pride. Hall said there are a lot of geological coincidences that happened to make Cleveland the perfect resting place for these fossils. He said drainage basins tend to be the best place to find fossils.
You can learn much more about the Cladoselache, and other primitive fish found in our area, on display at the Cleveland Museum of Natural History. Actions Facebook Tweet Email. The wound, probably caused by another Dunkleosteus, would have been fatal. The shark may have been scavenging the carcass of the big armored fish after a fatal attack by another Dunkleosteus. It could reach full gape in 60 milliseconds. Great white sharks. Polar bears. Two recent research projects by Cleveland Museum of Natural History scientists reveal some fascinating things about how Dunkleosteus pronounced dun-kul-OS-tee-us lived and grew, and possibly how it died.
Hint: The only thing apex predators have to fear are each other. A Treasure Trove of Fossils What researchers know about Dunkleosteus comes from its massive skull plates and jaw bones, which were entombed in the muddy ocean bottom when the creatures died and sank.
These teeth indicate that it was indeed a predator, likely eating whatever was smaller and slower than it was. However, because of its size, Cladoselache also had to worry about being eaten. There is evidence that the big arthrodires like Dunkleosteus really liked to snack on these early sharks. To protect themselves, these sharks had dorsal spines, which are found pretty commonly because they preserve so well. One of my favorite things about our Cladoselache fossils is that we often find their last meals preserved in their stomachs.
Like smaller sharks today, Cladoselache seems to have generally gulped down its food whole; we find the remains of small fish and crustaceans preserved in their middles. These sharks were larger than Cladoselache and are a lot rarer.
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