Placodonts were some of the most resilient groups of Triassic marine reptiles, consistently surviving minor extinction events with minimal diversity loss until the mass extinction.
In one timeline, this did not happen. Instead, their diversity would continue, in some ways replacing the turtles from our timeline.
The Mesozoic reccord of placodonts is relatively stable. Their diversity remains mostly consistent in spite of several other extinction events affecting other marine reptiles (such as thalattosaurs, phytosaurs and pleurosaurs), there being two major spikes of diversity: in the early Jurassic and late Cretaceous.
Soon after the TJ extinction event, Placochelyidae increases significantly in…
Moments between Chase Hunter and his father.
Chase’s father barely had time to say “Hello there, champ!” before the otter collided with his dad, nuzzling deep in his embrace.
“How was school today?” the older otter asked, stroking his son’s face gently.
“It was okay. Leo met two other kids, Sydney and Flynn, and we got to hang out!”
“Wait, Flynn like Flynn Moore?” the older otter asked, “As in the gila?”
“Yeah I guess” Chase replied sheepishly.
“So you’re hanging out with the mayor’s nephew” Chase’s father said in a playful deviousness, “though isn’t he a bit…
Long time readers will know that I contributed a lot to The Speculative Dinosaur Project’s Enantiornithes. Given my recent cladograms (themselves essentially slightly more complex versions of Mortimer 2019’s) I decided to map out Spec’s opposite bird clades given what we now know.
As you may know, I’ve long argued for a complex, “not just azhdarchids and nyctosaurids” youngest pterosaur faunas. Well, with post-Cenomanian/Turonian ornithocheirids confirmed, it’s another prediction gone right.
An updated version of the cladogram I achieved with Mortimer et al 2019 methodology + additional enantiornithean characters (as well as taxa). “Martinavis” as before is polyphyletic, North American remains being Halimornis and South American remains being Elbretornis.
Of all non-therian mammals, monotremes naturally are the best understood and well known given that they survived to present times in the first place. Crown group monotremes are a full Cenozoic phenomenon as echidnas evolved very recently from a platypus-like ancestor, but there is an abundance of Mesozoic stem-monotremes (collectively known as the australosphenidans or australosphenidan grade mammals due to teeth superficially convergent with those of boreosphenidans) known from Australia, South America and Madagascar.
Traditionally, these animals are depicted as platypus like, but it has since been found that at least Teinolophos (and likely all other Mesozoic stem monotremes) did…
“Surprise, bitch!” everyone shouts as Murdoch walked into the room.
The poor fox still has tear crusts in his fur after waiting all day for his father, mother and Holly to wish him a happy birthday, but it seems all he gave up for them was never enough. His mother did talk to him… to criticise him once more. It was the last straw, and as the sun dipped in the horizon he had a mental breakdown, hiccuping wildly up to the moment Nik and Sam had greeted him at their home.
“Are you okay?” Sam had asked, hugging him…
It was a spring afternoon, though in TJ’s room it felt more like winter, much as Sydney loved. He saw snow exactly once in his life and fell in love, and hoped to one day move to the north with the love of his life.
They were both laying in bed, relaxing their paws after so much running in PE and across the Payton school’s corridors. At the insistence of TJ’s parents and certainly with no protest from TJ, they both began to work on their homework. Sydney, naturally, had usually low grades on most disciplines, but he rather…