''Striatolamia'' is an extinct
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
of
sharks
Sharks are a group of elasmobranch fish characterized by a cartilaginous skeleton, five to seven gill slits on the sides of the head, and pectoral fins that are not fused to the head. Modern sharks are classified within the clade Selachimorp ...
belonging to the family
Odontaspididae.
[Fossilworks]
/ref> These extinct sharks lived from the Early Paleocene
The Danian is the oldest age or lowest stage of the Paleocene Epoch or Series, of the Paleogene Period or System, and of the Cenozoic Era or Erathem. The beginning of the Danian (and the end of the preceding Maastrichtian) is at the Cretaceo ...
to Late Miocene
The Late Miocene (also known as Upper Miocene) is a sub-epoch of the Miocene epoch (geology), Epoch made up of two faunal stage, stages. The Tortonian and Messinian stages comprise the Late Miocene sub-epoch, which lasted from 11.63 Ma (million ye ...
(61.7 to 10.3 Ma).[
]
Etymology
The Latin genus name ''Striatolamia'' refers to the striations on the surface of the teeth.
Taxonomy
This genus had been assigned to families Mitsukurinidae
Mitsukurinidae is a family of sharks with one living genus, '' Mitsukurina'', and four fossil genera: ''Anomotodon'', '' Protoscapanorhynchus'', ''Scapanorhynchus'', and '' Woellsteinia'', though some taxonomists consider ''Scapanorhynchus'' to ...
and Striatolamiidae by other authors.[Jim Bourdo]
Striatolamia - The Life and Times of Long Dead Sharks
/ref>
Similar and related genera include '' Carcharoides'', '' Parodontaspis'', '' Priodontaspis'', '' Pseudoisurus'' and '' Synodontaspis''.[
]
Species
Species within this genus include:[
* ''Striatolamia macrota'' Agassiz 1843
* ''Striatolamia striata'' (Winkler 1874)][
* ''Striatolamia whitei'' (Arambourg, 1952)
]
Description
''Striatolamia'' species could reach a length of about . Its teeth are notably big and rather common in sediments. The anterior teeth have elongated crowns, with striations on the lingual face and small lateral cusplets. The lateral teeth are smaller and broader, with weaker striations.Squali
/ref>
''S. macrota'' anterior teeth have smaller roots than ''S. striata'', and they are often recurved. Another difference between these two species is the length of their teeth. Teeth of ''striata'' are generally smaller () than ''macrota'' ().[
]
Distribution and habitat
Most widespread species of ''Striatolamia'' are ''S. striata'' and ''S. macrota''. Fossil teeth and calcified vertebrae of ''Striatolamia'' species have been found all over the world.[ These sharks lived in waters with low salinity.
]
See also
* ''Isurolamna
''Isurolamna'' is an extinct genus of mackerel shark from the Paleogene period. It contains at least three species and a fourth is sometimes placed in it. It is thought to be closely related to ''Macrorhizodus'', ''Isurus'', and ''Cosmopolitodus ...
''
*''Serratolamna
''Serratolamna'' is an extinct genus of mackerel sharks that is placed in the monotypic family Serratolamnidae.
Species
Species within this genus include:
*''Serratolamna africana''
*''Serratolamna amonensis''
*''Serratolamna caraibaea''
*''Ser ...
''
*''Otodus
''Otodus'' is an extinct genus of mackerel shark which lived from the Paleocene to the Pliocene epoch. The name ''Otodus'' comes from Ancient Greek (, meaning "ear") and (, meaning "tooth") – thus, "ear-shaped tooth".
Anatomy
This shark is k ...
''
*'' Jackelotodus''
References
Further reading
* Fossils (Smithsonian Handbooks) by David Ward (Page 202)
* Joe Cocke "Fossil shark teeth of the world"
* Cyril Walker & David Ward (1993) - Fossielen: Sesam Natuur Handboeken, Bosch & Keuning, Baarn.
External links
''Striatolamia macrota''
{{Taxonbar, from=Q861667
Odontaspididae
Prehistoric shark genera
Paleocene fish
Eocene fish
Oligocene fish
Miocene fish
Prehistoric fish of Australia
Prehistoric fish of Africa
Prehistoric fish of Asia
Prehistoric fish of Europe
Prehistoric fish of North America
Prehistoric fish of South America
Eocene animals of South America
Paleogene Chile
Fossils of Chile
Fossils of Great Britain
Fossils of England
Prehistoric fish of Antarctica
Fossil taxa described in 1964