lamna การใช้

• Its name comes from the similarity of its teeth to those of the extant shark genus " Lamna ."
• There is much taxonomic confusion regarding " Lamna " in the fossil record due to the high degree of variability in adult tooth morphology within species.
• In 1816, French naturalist Georges Cuvier placed the porbeagle into its own subgenus, " Lamna ", which later authors elevated to the rank of full genus.
• The presence of only one lateral keel on the tail and the lack of lateral cusps on the teeth distinguish the makos from the closely related porbeagle sharks of the genus " Lamna ".
• Quantification of red myotomal muscle volume and geometry in the shortfin mako shark ( " Isurus oxyrinchus " ) and the salmon shark ( " Lamna ditropis " ), using T1-weighted magnetic resonance imaging.
• Oophagy is thought to occur in all sharks in the order Lamniformes and has been recorded in the bigeye thresher ( " Alopias superciliosus " ), the pelagic thresher ( " A . pelagicus " ), the shortfin mako ( " Isurus oxyrinchus " ) and the porbeagle ( " Lamna nasus " ) among others.