Edestus is an extinct genus of eugeneodontid holocephalian fish known from the Late Carboniferous (Pennsylvanian) of the United Kingdom, Russia, and the United States. Most remains consist of isolated curved blades or "whorls" that are studded with teeth, that in life were situated within the midline of the upper and lower jaws.

剪齒鲨 （Edestus）是一種已經絕跡且鮮為人知的奇異軟骨魚，從 泥盆紀 晚期 [1] 到 石炭紀 晚期（賓夕法尼亞世）生活在世界各地的 海洋 中。

2019年1月31日 · But hundreds of millions of years ago, before the dawn of the dinosaurs, there lived a shark with a bite unlike any other: Edestus, the scissor shark. Paleontologists have known about Edestus...

剪齿鲨（Edestus） 剪齿鲨的大小跟 大白鲨 差不多，但是具有不断增长的牙齿，而且旧的牙齿并不会脱落，所以它嘴里满满都是旧齿和刚长出新齿。 它下巴也非常怪异，像一把剪刀，由于这种奇怪的构造，古生物学家感到非常困惑它是以何种方式捕获并吞噬猎物的。

2014年7月1日 · In North America, Edestus is most common in marine black shales of the Illinois Basin, but to date has not been found in marine gray shales or limestones in the Appalachian Basin. The failure to...

2019年9月4日 · Known as the scissor tooth shark, Edestus produced a unique dentition of spiraled tooth families positioned in the symphysis (midline) of the upper and lower jaws. Morphometric analysis of more than 200 ejected teeth and intact spiral tooth whorls demonstrates that teeth from the upper and lower whorls differ in shape and ontogeny.

Edestus is a type of prehistoric shark that lived during the Late Carboniferous Period about 300 million years ago. It was first discovered in the mid-nineteenth century and was eventually given the name Edestus by Joseph Leidy in 1855.

New research into the feeding habits of a long-extinct mysterious fish reveals that it may be the first animal ever known to use vertical thrashing of external teeth to kill its prey. And it had some seriously crazy teeth.

2020年1月20日 · Edestoids were a bizarre ancient group of sharks whose teeth grew out of blade-like structures fused to their upper and lower jaws. They include the infamous buzzsaw shark …

2019年1月17日 · POCATELLO – The ancient scissor-toothed shark Edestus was a “weird, weird beastie,” according to Leif Tapanila, Idaho State University geosciences professor and Idaho Museum of Natural History director. The shark, which disappeared more than 300 million years ago during the late Paleozoic era, had baffled researchers.