The Mighty Shovelhead

It's Darwin day. I never bothered with it until I realized how much it cheeses off the fundies, so stroke your beards and let's do another evolutionary topic to make Jesus not roll over in his grave because he's been dead for two thousand years and long-dissolved skeletons don't do that.

 

I stopped watching Jurassic Park movies after the second (and that idiotic gymnastics scene) but corporations being what they are, they've apparently been cranking out increasingly pointless sequels ever since, with increasingly ridiculous dinos that have basically become either goblins or kaiju, it's hard to tell. Or maybe I just don't care to. They must be scraping the bottom of the barrel if at least one recent installment, Dominion(?) included Lystrosaurus of all things, and of course gave it an adorable pug face with humid baby eyes, chubby cheeks and expressive human eyebrows, because you can never say hello to too many kitties.* I assume they heroically murder a laser-armed T-Rex like the ewoks they are.

 

But, for the very same reason Lystrosaurus makes a ridiculous addition to an action movie, it's an interesting evolutionary emblem. Look at the damn thing. Just... look at it. Even without expert reconstructions, from gross skeletal anatomy alone you can guess the piggish little overgrown newt-moles lacked most any big ticket evolutionary adaptations like speed, reach, defense, weaponry, etc. It's one of the most stunningly unimpressive life-forms to have ever existed. And yet, for millions of years at the start of the Triassic, those doofy, quasimodoed stooges ruled the land.

 

For decades, countless learned pates appear to have bent over backwards trying to explain by reason or/of adaptation why Lystrosaurus took over so thoroughly. But so far, the best explanation remains the simplest and least flattering: the waddling clowns just got lucky! They're the classic example of a disaster taxon cranked up to eleven by the biggest disaster before we came along to destroy all of creation. The Permian mass extinction ("The Great Dying") wiped the board of their competitors and predators, and the few survivors reproduced out of control, filling that elusive environmental niche known as "mine, all mine" until reptiles and dinosaurs gradually outpaced and drove them into extinction.

 

The meek really did inherit the Earth, and then God fed 'em to giant salamanders. Ah, the grandeur of a perfect omniscient plan.

 

 

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* Looks like the movie also took some license with the shoulder joint and limb length to make it more action-oriented. Actual reconstructed skeletons look more splay-limbed and stubby. Then again, I'm guessing this is the least of what's wrong with the movie series.

 

By the by, Lystrosaurus wasn't a dinosaur or even any kind of "saurus" at all, but a therapsid cousin to our own proto-mammalian ancestors. Ugh, this was our champion? Man, we really took a beating back in the Mesozoic. Must be why we're destroying everything now. Repressed therapsid trauma.