I No Have any experience in that but if can help by some information or link:

Article Development of understanding of the Mesozoic and Cenozoic ch...

https://www.fossilguy.com/gallery/vert/fish-shark/shark_evolution/shark_evolution.htm

https://www.sharktrust.org/shark-evolution

https://www.nhm.ac.uk/discover/shark-evolution-a-450-million-year-timeline.html

Article An early Cenozoic Neoselachian Shark Fauna from the Southwest Pacific

http://www.elasmo-research.org/education/evolution/geologic_time.htm

This tooth belongs to the genus Odontaspis Agassiz, 1838., most likely Odontaspis elegans † (Agassiz, 1838). However, for exact species identification, the geological formation in which it is located must be also known.

Determining the species name of a shark from the Mesozoic or Cenozoic era (which includes the Triassic, Jurassic, and Cretaceous periods, as well as the Paleogene and Neogene periods) can be a challenging task, as many of the sharks that lived during these periods are known only from fragmentary fossil remains. In order to accurately determine the species name of a shark from this time period, it is often necessary to have access to detailed descriptions or illustrations of the shark's fossil remains, as well as a good understanding of shark anatomy and taxonomy.

To determine the species name of a shark from the Mesozoic or Cenozoic era, you will need to examine the characteristics of the shark's fossil remains, such as the shape and size of the teeth, the structure of the vertebrae, and the presence or absence of specific features such as lateral line canals or gill rakers. You may also need to consider other factors such as the age and location of the fossil, the rock formations in which the fossil was found, and the presence or absence of other fossilized animals or plants in the same area.

It is important to note that the identification of shark fossils can be difficult even for experts in paleontology, and that it may be necessary to seek the help of a specialist in order to accurately determine the species name of a shark from the Mesozoic or Cenozoic era. In some cases, it may also be necessary to use more advanced techniques such as microscopy or DNA analysis in order to accurately identify the species of shark.

In theory, this is correct, but in practice, it is not. Fossil cartilaginous forms are often unable to find any fragments other than their teeth. For example, Xiphodolamia ssp. Although it is represented by four different species worldwide, there is no evidence other than its teeth! For this reason, there is no element other than the geological formation in which the teeth are found that can be used to make the definitions.