Ptychodus Shark Fossils—Indirect Evidence for Antediluvian Longevity?
by Jake Hebert, Ph.D. | Feb. 16, 2026
In Journal of Creation. 38 (3): 7-9.
Abstract
New research shows that giant fossil sharks in the genus Ptychodus had a morphology similar to that of the extant porbeagle shark, Lamna nasus. Previous research showed that Ptychodus likely experienced delayed maturation compared to extant sharks. This clarification of the Ptychodus body shape strengthens the argument for a prolonged growth interval. This may be of interest to creationists because there is evidence that prolonged growth intervals and giantism are positively correlated with greater longevity in living animals.
Click here to read the full article text.
Extensive Messianic Prophecy Corruptions and Flood-Related Chronology Errors Disqualify the Septuagint (LXX): Revisited and Expanded
by J. P. Tomkins, Ph.D., D. W. Daniels, M.Div., and J. J. S. Johnson, J.D., Th.D.
In Creation Research Society Quarterly. 62 (2): 136-149.
Abstract
Fossil Crocodilians Grew Larger and Longer, and Lived Longer than Extant Crocodilians
In Creation Research Society Quarterly. 61 (3): 172-188.
Abstract
Evidence for Endogenous Collagen in Edmontosaurus Fossil Bone
In Analytical Chemistry. 97 (5): 2618-2628.
Abstract
Late Pleistocene Body Size Reduction: Evidence of a Post-Flood Decline in Longevity?
In Late Pleistocene Body Size Reduction: Evidence of a Post-Flood Decline in Longevity? Journal of Creation. 38 (1).
Abstract
More Articles
- Christ the Image of God: Exposition and Practical-Theological Application of Colossians 1:15
- Colossians 1:16-17 and the Theological Implications of Christ as Creator and Sustainer
- Crassostrea Oyster Fossils Show Extreme Longevity
- Giantism and Delayed Maturation in Fossil Sharks: Evidence for Extreme Longevity?
- A Progressive Global Flood Model Confirmed by Rock Data Across Five Continents
- A Creation Model of Design: Application of an Interface Systems Model in Key Global Symbiotic Relationships
- Testing the Cavefish Model: An Organism-focused Theory of Testing the Cavefish Model: An Organism-focused Theory of Biological Design Biological Design
- Developing a Comprehensive Model of Global Flood Paleontology: Integrating the Biostratigraphic Record with Global Megasequence Deposition
- Allometric and Metabolic Scaling: Arguments for Design... and Clues to Explaining Pre-Flood Longevity?
- Preservation of Whole Antibodies within Ancient Teeth
- The Strange Endless Universe Cosmology of Open Theism
- Milankovitch evidence: strong despite weaknesses in the 1976 ‘Pacemaker’ paper?
- The Post-Flood Ark Dispersal and Early Pleistocene: Exegetical and Geological Notes on Genesis 8:13-22
- Towards a More Realistic Young-Earth Ice Sheet Model: A Shallow, Isothermal Ice Ridge with a Frozen Base