Striatolamia

Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Classis: Chondrichthyes
Subclassis: Elasmobranchii
Infraclassis: Euselachii
Division/Cohort: Neoselachii
Subdivision/Subcohort: Selachimorpha
Superordo: Galeomorphii
Ordo: Lamniformes

Familia: Mitsukurinidae
Genus: †Striatolamia

Species: †S. cederstroemi – †S. elegans – †S. elongata – †S. macrota – †S. rossica – †S. sibirica – †S. striata – †S. tchelkarnurensis – †S. whitei
Name

†Striatolamia Glikman, 1964
References

Glikman, L.S. 1964. Akuly paleogena i ich stratigrafičeskoe značenie (Sharks of Paleogene and their stratigraphic significance). Nauka, Moskva. 229 pp., 76 fig., 31 pl. Reference page.

Striatolamia is an extinct genus of sharks belonging to the family Odontaspididae.[1] These extinct sharks lived from the Early Paleocene to Late Miocene (61.7 to 10.3 Ma).[1]
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 and Striatolamiidae by other authors.[2]

Similar and related genera include Carcharoides, Parodontaspis, Priodontaspis, Pseudoisurus and Synodontaspis.[1]
Species

Species within this genus include:[1]

Striatolamia macrota Agassiz 1843[3]
Striatolamia striata (Winkler 1874)[2]
Striatolamia whitei (Arambourg, 1952)[4]

Description

Striatolamia species could reach a length of about 350 centimetres (140 in). 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.[5]

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 (13 to 51 millimetres (0.51 to 2.01 in)) than macrota (19 to 38 millimetres (0.75 to 1.50 in)).[2]
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.[1] These sharks lived in waters with low salinity.
See also

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Isurolamna
Serratolamna
Otodus

References

Fossilworks
Jim Bourdon Striatolamia - The Life and Times of Long Dead Sharks
S.B. Cunningham A comparison of isolated teeth of early Eocene Striatolamia macrota (Chondrichthyes, Lamniformes), with those of a Recent sand shark, Carcharias taurus.
Arambourg, C. (1952) - Les vertébrés fossiles des gisements de phosphates (Maroc-Algérie-Tunisie). Notes et Mémoires du Service Géologique du Maroc, 92: 1-372, 62 fig., 44 pl.

Squali