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New York City USA - American Museum of Natural History - Dunkleosteus

Dunkleosteus is an extinct genus of large arthrodire ("jointed-neck") fish that existed during the Late Devonian period, about 382–358 million years ago. It was a pelagic fish inhabiting open waters, and one of the first apex predators of any ecosystem.

 

Dunkleosteus consists of ten species, some of which are among the largest placoderms ("plate-skinned") to have ever lived: D. terrelli, D. belgicus, D. denisoni, D. marsaisi, D. magnificus, D. missouriensis, D. newberryi, D. amblyodoratus, D. raveri, and D. tuderensis. The largest and most well known species is D. terrelli. Since body shape is not known, various methods of estimation put the living total length of the largest known specimen between 4.1 to 10 m (13 to 33 ft) long and weigh around 1–4 t (1.1–4.4 short tons). However, lengths of 5 metres (16 ft) or more are not well supported by evidence and the most extensive analyses on the size of Dunkleosteus support smaller length estimates.

 

Dunkleosteus could quickly open and close its jaw, creating suction like modern-day suction feeders, and had a bite force that is considered the highest of any living or fossil fish, and among the highest of any animal. Numerous fossils of the various species have been found in North America, Poland, Belgium, and Morocco.

 

The largest collection of Dunkleosteus fossils in the world is housed at the Cleveland Museum of Natural History, with smaller collections (in descending order of size) held at the American Museum of Natural History Smithsonian National Museum of Natural History, Yale Peabody Museum, the Natural History Museum in London, and the Cincinnati Museum Center. Specimens of Dunkleosteus are on display in many museums throughout the world (see table below), most of which are casts of the same specimen: CMNH 5768, the largest well-preserved individual of D. terrelli. The original CMNH 5768 is on display in the Cleveland Museum of Natural History.

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Uploaded on October 30, 2023
Taken on October 16, 2010