Dickinsonia was a bilateral worm That possessed a soft body, yet firm In Precambrian seas It became quite the tease Not knowing the first thing about germs.
An ammonite in the Cretaceous ocean Was filled with the strongest emotion Her exquisite suture Preserved in the future But of extinctions, she had absolutely no notion.
Palaeocastor was a gigantic beaver In making dams, it was an overachiever It chewed down stout trees With consummate ease Turning today’s beavers into unbelievers.
A mammoth of considerable size Was really an elephant in hairy disguise With tusks that were too long Making love just felt wrong As a lady mammoth very quickly surmised.
Smilodon was a saber-toothed cat Who ate muscle, gristle, bone, and fat Its size, to be male Was the same as female And their teeth were quite pointed, not flat.
Some dinosaur diggers Down Under Were looking for old bones to plunder In Cretaceous rocks They worked like bullocks Doing everything they could not to chunder.
(This limerick and the two preceding ones are in honor of the Dinosaur Dreaming dig site near Inverloch, Victoria in Australia.)
Flat Rocks is a place filled with bones But to find them, you have to crack stones A mammal jaw here Deserves a big beer You just have to break the right zones.
Oryctodromeus is a very long name But it’s descriptive, so hold all your blame With arms as digging tools And long legs, it broke rules A burrower of unparalleled fame.
A crayfish from the Early Cretaceous Was so large it was considered predaceous With one giant claw You were shoved in its maw Producing scat that was also hellacious.
(Poem was debuted live on October 18, 2009 at the Geological Society of America annual meeting in Portland, Oregon.)
Megalania was much more than a lizard With a gigantic stomach and gizzard With recurving teeth This varanid bequeathed Lacerations that sliced, diced, and scissored.
A synapsid with a diminutive head Was barely aware of itself getting fed With low-quality fodder It was a very slow plodder No wonder, by the Triassic, it was dead.
I am an ichnologist, someone who studies the traces and trace fossils left by life: tracks, trails, burrows, and other indirect signs of behavior. Modern and ancient traces alike interest me, as these lend insights on how behavior has changed through time (or not).