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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.
Fossil of the Early Cretaceous-Eocene shark Cretolamna †Cretolamna †Cretolamna appendiculata †Cretorectolobus †Cretorectolobus olsoni – or unidentified comparable form †Crosbysaurus – type locality for genus †Crosbysaurus harrisae – type locality for species; Cucullaea †Cucullaea capax †Cucullaea powersi; Cuspidaria ...
Acrocanthosaurus.. Archaeologist Jack. T. Hughes has found evidence that the paleo-Indians of Texas collected fossils. [20] After the establishment of paleontology as a formal science, in 1878, professor Jacob Boll made the first scientifically documented Texan fossil finds in Archer and Wichita counties while collecting fossils on behalf of Edward Drinker Cope.
A fossil reveals how a now-extinct species of dugong was swimming in the sea about 15 million years ago when it was preyed upon by a crocodile and a tiger shark.
This list of the Paleozoic life of Texas contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Texas and are between 538.8 and 252.17 million years of age.
Dallasiella is an extinct genus of mackerel sharks that lived during the Late Cretaceous. It contains two valid species, D. willistoni and D. brachyodon, which have been found in North America and Europe. [1] [2] While formerly placed in the families Cretoxyrhinidae and Archaeolamnidae, it is now considered Lamniformes incertae sedis. [2]
The Waco Mammoth National Monument is found in Waco, Texas. The location of the monument lies on along the Bosque River, within 100 acres of wooded parkland. [12] It is theorized that due to the proximity to the river, the deaths of the uncovered prehistoric animals were a result of flash flooding, drowning the creatures about 67,000 years ago.
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.