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Galagadon (/ ɡ æ l ʌ ɡ ə d ɒ n /) is an extinct genus of small carpet shark that lived during the Late Cretaceous period. It contains one species, G. nordquistae. It was named after the video game Galaga due to a resemblance between its teeth and the spaceships in the game, [1] and Field Museum volunteer Karen Nordquist.
Paleontologists discovered the fossilized remains of an aquatic “dragon” that prowled the Pacific Ocean millions of years ago. The monstrous predator — which measured as long as a great ...
Ptychodus was a large shark, previously estimated at 10 meters (33 feet) long based on extrapolation from teeth. [ 13 ] [ 14 ] The subadult specimen with the largest vertebra showed that it could reach lengths of 4.3–7.07 m (14.1–23.2 ft), so a 10 m (33 ft) length is possible, but more analysis is required for verification.
Galeocerdo alabamensis is an extinct relative of the modern tiger shark. Nomenclature of this shark has been debated, and recent literature identified it more closely with the Physogaleus genus of prehistoric shark, rather than Galeocerdo. The classification of Physogaleus is known as tiger-like sharks while Galeocerdo refers to tiger sharks.
The lost shark (Carcharhinus obsoletus), [a] previously known as the false smalltail shark, is a possibly extinct species of requiem shark (family Carcharhinidae). It is known only from the Western Central Pacific Ocean , in the southern South China Sea .
The shark is believed to be an ancestor of the great white shark. It is now extinct, but its teeth once spanned up to 8.9 cm (3.5 inches) in length, while adults could grow to near seven meters in ...
“And it represents an entire ecology of the ocean 9 millions of years ago.” The fossils were first uncovered during the school’s modernization project, which began in 2022.
Based on allometric scaling of a great white shark, Shimada found that such individual would have weighed as much as 3,400 kilograms (3.3 long tons; 3.7 short tons). [ 34 ] A remeasurement conducted by Newbrey et al. (2013) found that C. mantelli and C. agassizensis reached sexual maturity at around four to five years of age and proposed a ...