Was just reviewing a paper that covers this, which apparently can be used to calculate mackerel shark total body lengths based on an anterior tooth to some accuracy. [Length in cm = -26.665 + crown heights (in mm) times 12.499] Since this formula was devised from modern goblin sharks, anyone know if it can also be used with carcharhiniform/ground shark teeth or are they too dissimilar? (Have a somewhat large hemipristis upper anterior I've meant to try this on)