The fossil record suggests belemnites shrunk 40 percent around 183 million years ago, when volcanic eruptions caused temperatures to rise.
The fossil record suggests climate change could cause animals to shrink as they appear to have done in the past.adds to a growing body of evidence suggesting historic shifts in temperature have caused species to downgrade in terms of size—a trend that may very well repeat in response to anthropomorphic climate change.
Samples collected near Peniche, Portugal, show a 40 percent decrease in the volume of the rostrum approximately 183 million years ago, which appears to have been triggered by a period of volcanically-driven warming. This preceded the Toarcian Oceanic Anoxic Event, which saw extreme ocean warming and the local extinction of belemnites.Pseudohastites longiformisThe researchers say the"most significant and largest reduction" was seen in P.
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