Lethenia

Apr 19, 2026 - 02:26
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Lethenia

← Previous revision Revision as of 20:55, 18 April 2026
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'''''Lethenia''''' is an extinct genus of [[Lamnidae|mackerel shark]] from the [[Eocene]] and [[Oligocene]] epochs. It contains two species; the [[type species]] ''L. vanderbroecki'' is from the early Oligocene ([[Rupelian|Rupelian age]]) of Belgium. It is considered closely related to ''[[Isurolamna]]'' and sometimes included within it. It differs in the morphology of its teeth, which are much more gracile than ''Isurolamna'' and has larger spacing between its crown and lateral cusps. A recently descrebried species, '''''L. carranzaensis''''', was found in the [[Eocene]] and [[Oligocene]] deposites of Chile, originally descrebried as ''Isurolamna'' sp. [[fossil]]. Some paleontologist thinks that ''[[Lethenia]]'' can belongs in reality ''[[Lamna]]'' species, and not a separate genus, what would make ''Lethenia'' a [[junior synonym]].
'''''Lethenia''''' is an extinct genus of [[Lamnidae|mackerel shark]] from the [[Eocene]] and [[Oligocene]] epochs. It contains two species; the [[type species]] '''''L. vanderbroecki''''' is from the early Oligocene ([[Rupelian|Rupelian age]]) of Belgium. It is considered closely related to ''[[Isurolamna]]'' and sometimes included within it. It differs in the morphology of its teeth, which are much more gracile than ''Isurolamna'' and has larger spacing between its crown and lateral cusps. A recently descrebried species, '''''L. carranzaensis''''', was found in the [[Eocene]] and [[Oligocene]] deposites of Chile, originally descrebried as ''Isurolamna'' sp. [[fossil]]. Some paleontologist thinks that ''Lethenia'' can belongs in reality ''[[Lamna]]'' species, and not a separate genus, what would make ''Lethenia'' a [[junior synonym]].


== Taxonomy ==
== Taxonomy ==
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