Size calculations for Otodus megalodon.
Size Calculation Methods:
1. Use jaw length.
Time: Miocene Epoch of the Neogene period: 23-5.3 million years ago.
Place: Worldwide.
Update (9/13/19): All specimens are up-to-date.
Update (9/13/19): All specimens are up-to-date.
The Percentage Increase/Decrease Method:
1. Take new number and subtract it from original number.
2. Take that number and divide it by the original number and multiply by 100.
3. That number will by your percentage increase or decrease if it's negative.
Ex.: "Stan's" Femur is 130 and has a body length of 12.2 meters. "Wyrex" has a femur length of 132.7 cm.
132.7 - 130 = 2.7.
2.7 divided by (represented by "/") and multiplied by (represented by "*") equals 2.1.
(2.7/130*100 = 2.1)
2.1 is your percentage increase, or 2.1% increase.
12.2 m + 2.1% = 12.5 meters for "Wyrex."
Links:
Percentage Increase/Decrease Method Links:
"Percentage Change - Percentage Increase and Decrease." SkillsYouNeed:
"Relative Increase." percentage.calculators.ro:
Size Calculation Methods:
1. Use jaw length.
2. Take tooth crown height (not bottom part) and compare it to other specimens. (Pimiento and Balk, 2015, "Methods," "Tooth Measurements")
Model: Great White Shark:
Jaws: 92 cm (length), 72 cm (height).
Body: 19 feet 6 inches (5.94 meters).
Link:
Link:
Specimens:
1. Largest Specimen (Mustain, 2011) (theworldslargestskarksjaw.com):
2.7 meters (tall), 3.4 meters (across). (Mustain, 2011) (theworldslargestskarksjaw.com)
2.7 meters (tall), 3.4 meters (across). (Mustain, 2011) (theworldslargestskarksjaw.com)
Size Estimate: 75 feet. (theworldslargestskarksjaw.com)
I'm going to assume that "3.4 meters across" is the length of the jaws.
Great White Shark:
Jaws: 92 cm (length), 72 cm (height).
Body: 19 feet 6 inches (5.94 meters).
92 - 340 = 248.
248/92*100 = 269.6% increase.
248/92*100 = 269.6% increase.
5.9 m + 269.6% = 72 feet (21.8 meters).
Link:
Mustain (2011):
2. 8-Foot (2.44-Meter) Jaws (Savage Ancient Seas):
Great White Shark:
Jaws: 92 cm (length), 72 cm (height).
Body: 19 feet 6 inches (5.94 meters).
92 - 244 = 152.
152/92*100 = 165.2% increase.
152/92*100 = 165.2% increase.
5.9 m + 165.2% = 52 feet (15.7 meters).
Link:
Savage Ancient Seas:
Savage Ancient Seas:
3. 2.8-Meter (Wide) Jaws (Dinosaur Sanctuary):
Great White Shark:
Jaws: 92 cm (length), 72 cm (height).
Body: 19 feet 6 inches (5.94 meters).
92 - 280 = 188.
188/92*100 = 204.4% increase.
188/92*100 = 204.4% increase.
5.9 m + 204.4% = 59 feet (18.0 meters).
Link:
Dinosaur Sanctuary (pg. 19):
Dinosaur Sanctuary (pg. 19):
Megalodon's Total Length: 52-72 feet (15.7-21.8 meters).
Links:
Pimiento and Balk (2015) ("Methods," "Tooth Measurements"):
Time:
Boessenecker et al., (2019) ("Abstract"):
Pimiento et al., (2016):
International Chronostratigraphic Chart (2019 Version):
http://stratigraphy.org/index.php/ics-chart-timescale
Name:
Name:
Boessenecker et al., (2019) ("Abstract"):
Location:
Hideo et al., (2004):