''Dalatias'' is a genus of kitefin sharks that have lived since the

Middle Eocene The Eocene ( ) is a geological epoch that lasted from about 56 to 33.9 million years ago (Ma). It is the second epoch of the Paleogene Period in the modern Cenozoic Era. The name ''Eocene'' comes from the Ancient Greek (''Ēṓs'', ' Dawn') a ...

. The genus contains one extant and two extinct species: '' D. licha'' (the

type species In International_Code_of_Zoological_Nomenclature, zoological nomenclature, a type species (''species typica'') is the species name with which the name of a genus or subgenus is considered to be permanently taxonomically associated, i.e., the spe ...

), ''D. turkmenicus'' and ''D. orientalis''. Because ''D. turkmenicus'' was described on the basis of a single tooth crown, ''D. licha'' was considered as the only valid species within the genus until Malyshkina et al. (2023) described a third species, ''D. orientalis'', from the

Middle Miocene The Middle Miocene is a sub-epoch of the Miocene epoch (geology), epoch made up of two Stage (stratigraphy), stages: the Langhian and Serravallian stages. The Middle Miocene is preceded by the Early Miocene. The sub-epoch lasted from 15.97 ± 0. ...

Duho Formation The Duho Formation () is a Middle Miocene geological Formation (geology), formation in Pohang, South Korea. This formation is deposited in a Deep sea, deep marine Depositional environment, environment and is roughly dated to around based on vari ...

Pohang Pohang (; ), formerly spelled Po-Hang, is the largest city in North Gyeongsang Province, South Korea, with a List of cities in South Korea, population of 499,363 as of 2022, bordering the Sea of Japan, East Sea to the east, Yeongcheon to the w ...

South Korea South Korea, officially the Republic of Korea (ROK), is a country in East Asia. It constitutes the southern half of the Korea, Korean Peninsula and borders North Korea along the Korean Demilitarized Zone, with the Yellow Sea to the west and t ...

References

{{Taxonbar, from=Q17289192 Extant Eocene first appearances Shark genera Taxa named by Constantine Samuel Rafinesque Dalatiidae