WEBVTT 00:00:00.000 --> 00:00:03.379 You know, there is something deeply permanent 00:00:03.379 --> 00:00:06.400 about a name. Oh, for sure. You walk into a museum, 00:00:06.580 --> 00:00:08.859 you see a massive skeleton mounted on a frame. 00:00:09.039 --> 00:00:10.939 Yeah. And there's a little brass plaque. It says 00:00:10.939 --> 00:00:14.320 Tyrannosaurus Rex or Triceratops. And you just, 00:00:14.339 --> 00:00:16.079 you trust that plaque. Right. You assume it's 00:00:16.079 --> 00:00:19.559 settled science. Exactly. You assume that name 00:00:19.559 --> 00:00:21.739 is as solid as the rock the bone was dug out 00:00:21.739 --> 00:00:24.640 of. But what if I told you that in paleontology, 00:00:24.820 --> 00:00:28.699 names are sometimes, let's say, written in pencil? 00:00:29.079 --> 00:00:31.120 Or in the case we are looking at today, written 00:00:31.120 --> 00:00:33.979 in air quotes. Yes, that is the thing that grabbed 00:00:33.979 --> 00:00:36.020 me immediately when I opened up the packet for 00:00:36.020 --> 00:00:38.119 this deep dive. It stands out, doesn't it? It 00:00:38.119 --> 00:00:40.359 really does. Because we're looking at a creature 00:00:40.359 --> 00:00:43.500 from about 304 million years ago, but the title 00:00:43.500 --> 00:00:46.340 of the research isn't just Haptodus garnetensis. 00:00:46.679 --> 00:00:50.200 It is Haptodus, with these big, aggressive quotation 00:00:50.200 --> 00:00:53.670 marks around it, garnetensis. It honestly looks 00:00:53.670 --> 00:00:55.509 like the scientific record is being sarcastic. 00:00:55.609 --> 00:00:58.170 It totally does look that way. But those quotation 00:00:58.170 --> 00:01:00.030 marks are actually doing a lot of heavy lifting. 00:01:00.189 --> 00:01:02.649 How so? They are basically a signal flare. They 00:01:02.649 --> 00:01:05.650 tell us that we are stepping into this crime 00:01:05.650 --> 00:01:08.750 scene of mistaken identity, bureaucratic red 00:01:08.750 --> 00:01:11.569 tape, and a decades -long argument about who 00:01:11.569 --> 00:01:14.959 our ancestors actually were. So it is our mission 00:01:14.959 --> 00:01:17.299 for this deep dive. We're going to unpack the 00:01:17.299 --> 00:01:19.500 mystery of the quotation marks. We're going to 00:01:19.500 --> 00:01:22.459 travel back to ancient Kansas to look at a fossil 00:01:22.459 --> 00:01:24.920 that has been having a literal identity crisis 00:01:24.920 --> 00:01:27.959 since the 1970s. A very long identity crisis. 00:01:28.060 --> 00:01:31.140 Right. And spoiler alert for you listening. It 00:01:31.140 --> 00:01:33.280 turns out Haptotus might not be one animal. It 00:01:33.280 --> 00:01:34.719 might be three different animals wearing the 00:01:34.719 --> 00:01:37.359 same trench coat. A very dusty 300 million year 00:01:37.359 --> 00:01:40.659 old trench coat. Exactly. So let's set the stage 00:01:40.659 --> 00:01:42.700 before we get into all the Latin names and the 00:01:42.700 --> 00:01:45.219 taxonomy wars. We are not in the Jurassic Park 00:01:45.219 --> 00:01:47.760 era here. We are way further back. Much further. 00:01:47.840 --> 00:01:50.560 We are in the late Carboniferous period, specifically 00:01:50.560 --> 00:01:52.799 the late Cosimovian stage. So we are talking 00:01:52.799 --> 00:01:56.079 roughly 304 million years ago. And geographically, 00:01:56.079 --> 00:01:58.840 we are in Anderson County, Kansas. The site is 00:01:58.840 --> 00:02:01.500 called the Garnett Quarry. Now, I've driven through 00:02:01.500 --> 00:02:04.799 Kansas. I picture flat horizons, wheat fields, 00:02:05.000 --> 00:02:07.379 maybe a storm cellar. Sure, the classic Midwest. 00:02:07.879 --> 00:02:10.560 Yeah. But if I step out of the time machine in 00:02:10.560 --> 00:02:12.360 the Casamovian stage, is that what I'm seeing? 00:02:12.520 --> 00:02:14.240 Absolutely not. You are looking at a completely 00:02:14.240 --> 00:02:16.800 different planet, essentially. Okay. In the late 00:02:16.800 --> 00:02:19.560 Carboniferous, Kansas was sitting very close 00:02:19.560 --> 00:02:22.280 to the equator. It would have been hot, likely 00:02:22.280 --> 00:02:24.319 very humid, though the climate was just starting 00:02:24.319 --> 00:02:27.500 to fluctuate a bit. The Garnett Quarry site specifically 00:02:27.500 --> 00:02:30.319 represents a coastal or lagoonal environment. 00:02:30.680 --> 00:02:34.039 So water. Water and mud. Lots and lots of mud. 00:02:34.180 --> 00:02:37.800 A prehistoric spa day. If the spa was full of 00:02:37.800 --> 00:02:40.759 primitive conifers and teeming with early tetrapods, 00:02:40.860 --> 00:02:44.240 sure. It was this thriving terrestrial ecosystem. 00:02:44.719 --> 00:02:47.740 And that mud is super important because it acts 00:02:47.740 --> 00:02:49.340 like a time capsule. Because things get stuck 00:02:49.340 --> 00:02:52.439 in it. Right. It trapped these animals and preserved 00:02:52.439 --> 00:02:55.219 them in incredible detail within what geologists 00:02:55.219 --> 00:02:57.759 call the rock lake member of the Stanton Formation. 00:02:57.900 --> 00:03:00.319 Okay, so we are standing in the equatorial mud 00:03:00.319 --> 00:03:03.439 of ancient Kansas. We see a creature scuttling 00:03:03.439 --> 00:03:06.939 by. Let's look at the so -called Haptotis garnetensis. 00:03:07.379 --> 00:03:09.580 If I see this thing, what is my first instinct? 00:03:09.819 --> 00:03:12.800 Do I scream lizard? Do I scream dinosaur? If 00:03:12.800 --> 00:03:15.939 you scream dinosaur, you'd be about 70 or 80 00:03:15.939 --> 00:03:18.419 million years too early. Fair enough. And if 00:03:18.419 --> 00:03:20.919 you screamed lizard, you'd be describing its 00:03:20.919 --> 00:03:23.580 general vibe. I mean, it sprawls. It has a long 00:03:23.580 --> 00:03:27.000 tail. It looks reptilian. But you would be dead 00:03:27.000 --> 00:03:29.740 wrong about its family tree. Because this animal 00:03:29.740 --> 00:03:33.020 is a synapsid. Yes, exactly. It is a synapsid. 00:03:33.159 --> 00:03:35.500 Let's unpack synapsid for a second. We hear this 00:03:35.500 --> 00:03:37.740 term, but I think people usually just gloss over 00:03:37.740 --> 00:03:39.979 it as weird reptile thing. Which is a shame because 00:03:39.979 --> 00:03:41.599 it's probably the most important distinction 00:03:41.599 --> 00:03:43.840 in vertebrate history. Imagine a fork in the 00:03:43.840 --> 00:03:47.159 road. Life crawls out of the water. Eventually, 00:03:47.159 --> 00:03:50.120 there's a massive evolutionary split. Okay. One 00:03:50.120 --> 00:03:53.139 road leads to the cladesaur opsida. That path 00:03:53.139 --> 00:03:56.500 gives you reptiles, lizards, dinosaurs, and eventually 00:03:56.500 --> 00:03:58.759 birds. That's the path we usually see in the 00:03:58.759 --> 00:04:01.580 movies, the Jurassic Park path. Right. But there 00:04:01.580 --> 00:04:04.129 is another road. The synapsida. That is the line 00:04:04.129 --> 00:04:06.610 that leads to thrapsids, cynodonts, and eventually 00:04:06.610 --> 00:04:10.270 mammals. Us. Us. So when you look at our little 00:04:10.270 --> 00:04:13.990 Haptotis garnetensis, you aren't looking at a 00:04:13.990 --> 00:04:16.410 lizard's great -grandfather. You are looking 00:04:16.410 --> 00:04:19.610 at a very, very distant great -uncle on your 00:04:19.610 --> 00:04:22.069 own family tree. We call them stem mammals, right? 00:04:22.110 --> 00:04:24.610 They do. I love that concept. It's team mammal 00:04:24.610 --> 00:04:27.329 in a disguise. It looks like a reptile. Acts 00:04:27.329 --> 00:04:30.889 like a reptile. But deep down, its biology is 00:04:30.889 --> 00:04:33.050 pointing toward humanity. That is a great way 00:04:33.050 --> 00:04:35.550 to put it. Specifically, this animal is what 00:04:35.550 --> 00:04:39.470 we call a basal sphenacodont. Sphenacodont. I 00:04:39.470 --> 00:04:41.449 feel like I know that word from somewhere. You 00:04:41.449 --> 00:04:44.430 probably do, mostly thanks to toy stores. The 00:04:44.430 --> 00:04:49.009 most famous sphenacodont is Dimetrodon. Oh. The 00:04:49.009 --> 00:04:51.029 one with the giant sail on its back? That's the 00:04:51.029 --> 00:04:53.269 one. The one that is always included in the bag 00:04:53.269 --> 00:04:55.759 of plastic dinosaurs, even though... It definitely 00:04:55.759 --> 00:04:58.500 isn't a dinosaur. We're very same. Dimetrodon 00:04:58.500 --> 00:05:00.759 is kind of the rock star of the sphenacodons. 00:05:01.040 --> 00:05:04.339 Now, Argi, the haptotis from Kansas, is related 00:05:04.339 --> 00:05:07.800 to Dimetrodon, but it is basal. Meaning lower 00:05:07.800 --> 00:05:10.100 on the tree. Right. It sits lower on the evolutionary 00:05:10.100 --> 00:05:12.259 tree. It's an earlier branch, so it didn't have 00:05:12.259 --> 00:05:14.180 the big flashy sail. It was much more modest. 00:05:14.480 --> 00:05:16.699 So it's like the beta version. Before they added 00:05:16.699 --> 00:05:19.000 the spoiler and the raising stripes. In a way, 00:05:19.060 --> 00:05:23.139 yes. But it was a highly successful design. These 00:05:23.139 --> 00:05:25.160 were predators. They had sharp teeth, strong 00:05:25.160 --> 00:05:28.339 jaws. They were eating insects, maybe small amphibians. 00:05:28.459 --> 00:05:30.259 They were doing quite well in that Kansas lagoon. 00:05:30.379 --> 00:05:31.939 And the reason we know they were doing well is 00:05:31.939 --> 00:05:34.019 because we didn't just find one random toe bone. 00:05:34.399 --> 00:05:36.480 The source material for this deep dive makes 00:05:36.480 --> 00:05:38.879 a massive deal about the quality of the fossils 00:05:38.879 --> 00:05:41.920 found at Garnet Quarry. It really is a paleontologist's 00:05:41.920 --> 00:05:44.579 dream. Usually from this specific era, you get 00:05:44.579 --> 00:05:47.279 fragments. A jaw piece here, a crushed rib there. 00:05:47.720 --> 00:05:51.000 But at Garnet, they found an absolute treasure 00:05:51.000 --> 00:05:54.110 trove. The source highlights a specific holotype 00:05:54.110 --> 00:05:58.649 specimen, RM14156. Now, a holotype is the standard 00:05:58.649 --> 00:06:00.550 for this species, right? Like the reference model. 00:06:00.709 --> 00:06:02.470 Correct. It's the physical ruler you measure 00:06:02.470 --> 00:06:06.470 every other fob against. This specimen, RM14156, 00:06:06.550 --> 00:06:09.230 was a partially articulated skeleton. It had 00:06:09.230 --> 00:06:11.829 both cranial parts, so the skull and post -cranial 00:06:11.829 --> 00:06:14.069 parts, the body, all together. Which is rare 00:06:14.069 --> 00:06:15.930 enough. Very rare. But they didn't stop there. 00:06:16.009 --> 00:06:18.769 Over time, they found more than 16 well -preserved 00:06:18.769 --> 00:06:21.560 specimens in that quarry. And here. is where 00:06:21.560 --> 00:06:24.100 it gets really interesting to me. The notes mention 00:06:24.100 --> 00:06:27.120 that the holotype, that gold standard specimen, 00:06:27.459 --> 00:06:29.939 was a teenager. It was an immature individual, 00:06:30.259 --> 00:06:33.779 yeah. And that is actually a huge stroke of luck 00:06:33.779 --> 00:06:36.480 for us. Because we have so many specimens from 00:06:36.480 --> 00:06:39.399 the site, we have what we call an ontogenetic 00:06:39.399 --> 00:06:42.360 series. Ontogenetic. That sounds like an expensive 00:06:42.360 --> 00:06:44.699 word. It basically just means growing up. We 00:06:44.699 --> 00:06:46.660 have fossils that represent different stages 00:06:46.660 --> 00:06:49.180 of the animal's life. We can see the babies, 00:06:49.240 --> 00:06:51.399 the adolescents, and the full -grown adults. 00:06:51.720 --> 00:06:54.379 That must be incredibly rare. It is. Usually 00:06:54.379 --> 00:06:56.819 you find one bone from one adult and you have 00:06:56.819 --> 00:06:58.560 to guess what the rest of the life cycle looked 00:06:58.560 --> 00:07:02.240 like. flip through the family photo album so 00:07:02.240 --> 00:07:04.939 we have a prehistoric nursery we have incredible 00:07:04.939 --> 00:07:07.819 fossils we know where they lived we know there 00:07:07.819 --> 00:07:11.279 are distant mammalian cousins so why the identity 00:07:11.279 --> 00:07:14.579 crisis why the scare quotes in the name this 00:07:14.579 --> 00:07:16.800 is where we leave the mud of Kansas and enter 00:07:16.800 --> 00:07:20.759 the dusty libraries of taxonomy this is the taxonomy 00:07:20.759 --> 00:07:23.699 war I assume this war started when the creature 00:07:23.699 --> 00:07:26.149 was first named It started with perfectly good 00:07:26.149 --> 00:07:30.089 intentions. Back in 1977, a paleontologist named 00:07:30.089 --> 00:07:33.230 Currie described these fossils. At the time, 00:07:33.269 --> 00:07:35.129 looking at the general anatomy, they seemed to 00:07:35.129 --> 00:07:37.629 fit neatly into an already existing genus called 00:07:37.629 --> 00:07:40.490 Haptotus. Right. So he named the Kansas animals 00:07:40.490 --> 00:07:44.170 Haptotus garnetensis, which just means the Haptotus 00:07:44.170 --> 00:07:48.050 from Garnet. 1977. Simple times. Everyone is 00:07:48.050 --> 00:07:51.490 happy. For a while, yeah. But science is a process 00:07:51.490 --> 00:07:54.699 of refinement. Fast forward to the early 90s, 00:07:54.699 --> 00:07:58.139 1993 and 1994 to be exact, a researcher named 00:07:58.139 --> 00:08:00.899 Michel Loren decided to take a much closer look. 00:08:01.079 --> 00:08:03.180 But he didn't just look at the Kansas fossils. 00:08:03.420 --> 00:08:05.899 He looked at the foundation of the Heptotis genus 00:08:05.899 --> 00:08:07.819 itself. And he found cracks in the foundation. 00:08:08.160 --> 00:08:10.800 Massive ones. Every genus has a type species. 00:08:10.980 --> 00:08:13.500 That's the original definition. For Heptotis, 00:08:13.500 --> 00:08:15.699 the type species was Heptotis balei, which was 00:08:15.699 --> 00:08:18.069 found in Europe. Lauren went back to those original 00:08:18.069 --> 00:08:20.170 bailey fossils and realized they were, well, 00:08:20.250 --> 00:08:22.350 to put it politely, they were insufficient. Insufficient 00:08:22.350 --> 00:08:24.449 how? They were just too fragmentary. They didn't 00:08:24.449 --> 00:08:26.569 have enough unique anatomical features to really 00:08:26.569 --> 00:08:29.629 define a group. So Lauren declared Haptotis bailey 00:08:29.629 --> 00:08:32.769 a nomandubium. A nomandubium. Yeah. A dubious 00:08:32.769 --> 00:08:36.370 name. Exactly. A doubtful name. Now think about 00:08:36.370 --> 00:08:39.220 the logical cascade here. If the definition of 00:08:39.220 --> 00:08:42.120 haptotis is based on a pile of broken rocks from 00:08:42.120 --> 00:08:44.740 Europe that can't actually be identified, then 00:08:44.740 --> 00:08:47.179 the name itself is hollow. It's a phantom. It 00:08:47.179 --> 00:08:50.580 is. And if the genus Heptodus is a phantom, you 00:08:50.580 --> 00:08:53.919 can't attach our nice, solid, beautifully preserved 00:08:53.919 --> 00:08:57.259 Kansas fossils to it. So Heptodus garnetensis 00:08:57.259 --> 00:08:59.480 is essentially evicted. It's wearing a name tag 00:08:59.480 --> 00:09:02.019 that belongs to a ghost. Precisely. And that 00:09:02.019 --> 00:09:04.019 is exactly why the quotation marks appeared. 00:09:04.279 --> 00:09:06.299 The scientific community was saying, look, we 00:09:06.299 --> 00:09:08.139 know this isn't really a Heptodus because Heptodus 00:09:08.139 --> 00:09:10.860 barely exists anymore, but we don't have a new 00:09:10.860 --> 00:09:13.759 name for the Kansas fossils yet. So air quotes. 00:09:13.879 --> 00:09:15.820 That seems incredibly frustrating. It's like 00:09:15.820 --> 00:09:17.580 living in a... house for 20 years, but never 00:09:17.580 --> 00:09:20.200 being on the lease. It is frustrating, but it 00:09:20.200 --> 00:09:22.679 protects the scientific record from chaos. You 00:09:22.679 --> 00:09:24.460 wait until someone does the rigorous work to 00:09:24.460 --> 00:09:28.019 fix it. And that brings us to 2015 and a researcher 00:09:28.019 --> 00:09:30.419 named Friedrich Spindler. Spindler is kind of 00:09:30.419 --> 00:09:33.360 the hero of our story today. He decides to finally 00:09:33.360 --> 00:09:36.320 clean up this mess. He does. For his dissertation, 00:09:36.740 --> 00:09:40.299 Spindler did a massive deprovision of these basal 00:09:40.299 --> 00:09:43.769 synapsids. He compared the Kansas fossils to 00:09:43.769 --> 00:09:46.110 the European types and confirmed what Lauren 00:09:46.110 --> 00:09:48.169 had suspected all along. That they weren't the 00:09:48.169 --> 00:09:50.330 same. Right. The Kansas animal was definitely 00:09:50.330 --> 00:09:52.929 not congeneric with the original Haptodus. It 00:09:52.929 --> 00:09:55.129 was completely distinct. It needed its own name. 00:09:55.409 --> 00:09:59.309 And he gave it one. He proposed Eohaptodus. Eohaptodus, 00:09:59.610 --> 00:10:02.669 which translates roughly to Dawn Haptodus. Okay, 00:10:02.710 --> 00:10:05.450 so problem solved. We have a new name. We can 00:10:05.450 --> 00:10:07.850 take down the quotation marks. Why does the source 00:10:07.850 --> 00:10:10.370 material still use them? Why aren't we doing 00:10:10.370 --> 00:10:13.009 a deep dive on Eohaptodus instead of so -called 00:10:13.009 --> 00:10:15.649 Haptodus? Because of the bureaucracy of science. 00:10:16.009 --> 00:10:18.210 Of course. Spindler proposed the name Eohaptodus 00:10:18.210 --> 00:10:20.450 in his dissertation. But under the International 00:10:20.450 --> 00:10:23.570 Code of Zoological Nomenclature, which is basically 00:10:23.570 --> 00:10:26.129 the strict rulebook for naming animals, a dissertation 00:10:26.129 --> 00:10:28.289 is not always considered a formal publication. 00:10:28.649 --> 00:10:30.830 You're kidding. So because it was in a thesis 00:10:30.830 --> 00:10:34.389 and not, say, the Journal of Vertebrate Paleontology, 00:10:34.429 --> 00:10:36.509 it doesn't count? It counts as a very strong 00:10:36.509 --> 00:10:39.909 proposal, but not as an official law. So the 00:10:39.909 --> 00:10:43.070 name Eohaptidus is currently considered a nomen 00:10:43.070 --> 00:10:46.970 ex dissertatione. Nomen ex dissertatione. Literally 00:10:46.970 --> 00:10:49.610 a name from a dissertation. Exactly. Think of 00:10:49.610 --> 00:10:52.350 it as a waiting room name. It's valid in the 00:10:52.350 --> 00:10:54.210 sense that scientists know exactly what you're 00:10:54.210 --> 00:10:56.289 talking about when you say it, but it hasn't 00:10:56.289 --> 00:10:58.889 received that final formal stamp of approval 00:10:58.889 --> 00:11:02.269 to become official. So the quotation marks stay 00:11:02.269 --> 00:11:05.350 up as a warning sign. Like, caution, this name 00:11:05.350 --> 00:11:07.549 is pending validation. You got it. I actually 00:11:07.549 --> 00:11:09.679 kind of love that. It shows that science isn't 00:11:09.679 --> 00:11:11.799 just about discovery. It's about peer review, 00:11:12.039 --> 00:11:14.659 consensus, and making sure the filing system 00:11:14.659 --> 00:11:17.059 works. It's slow for a reason. It definitely 00:11:17.059 --> 00:11:20.000 is. But here is where the story gets really wild. 00:11:20.379 --> 00:11:22.600 Spindler didn't just stop at renaming the main 00:11:22.600 --> 00:11:25.240 group. He kept looking. Right. And this is the 00:11:25.240 --> 00:11:28.210 plot twist. Because up until this point... For 00:11:28.210 --> 00:11:31.330 40 years, everyone assumed that all 16 specimens 00:11:31.330 --> 00:11:33.870 in that Kansas quarry were the exact same animal. 00:11:33.950 --> 00:11:37.090 Just a big happy family of Haptidis or Eohaptidis 00:11:37.090 --> 00:11:39.110 hanging out in the mud together. That was the 00:11:39.110 --> 00:11:41.789 baseline assumption. One site, one species. But 00:11:41.789 --> 00:11:44.909 in 2020, Spindler went back to the bones. He 00:11:44.909 --> 00:11:47.309 started looking incredibly closely at specific 00:11:47.309 --> 00:11:49.669 specimens that had just been lumped in with the 00:11:49.669 --> 00:11:52.389 others for decades. And he noticed differences 00:11:52.389 --> 00:11:54.549 that couldn't be explained away by saying, oh, 00:11:54.610 --> 00:11:56.610 it's just a teenager or, oh, it's a female. These 00:11:56.610 --> 00:11:59.590 were fundamental anatomical differences. Correct. 00:11:59.850 --> 00:12:03.629 He looked at a specific specimen labeled ROM43608. 00:12:04.169 --> 00:12:06.289 Previously, everyone just nodded and said, yep, 00:12:06.330 --> 00:12:08.870 another Heptotis. But Spindler looked at the 00:12:08.870 --> 00:12:11.110 jaw structure, he looked at the teeth, and realized, 00:12:11.269 --> 00:12:14.149 this is a completely different animal. So there 00:12:14.149 --> 00:12:16.169 was a stranger in the nursery. A total stranger. 00:12:16.190 --> 00:12:18.690 He realized it was a new genus entirely, and 00:12:18.690 --> 00:12:21.350 he named it Kinomagnathus. Kinomagnathus. It's 00:12:21.350 --> 00:12:23.549 a robust name for a very robust animal. Yeah. 00:12:23.590 --> 00:12:25.529 But he wasn't done there. He looked at another 00:12:25.529 --> 00:12:30.090 specimen, ROM 43601. Let me guess. Not a Haptotis 00:12:30.090 --> 00:12:32.950 either. Not a Haptotis. He found distinct features 00:12:32.950 --> 00:12:35.210 in the skull and the limbs that separated it 00:12:35.210 --> 00:12:37.610 from both the main group and from Ceno -Magnathus. 00:12:37.750 --> 00:12:41.450 He split this one out as Tenuocaptor razi. Tenuocaptor. 00:12:41.970 --> 00:12:45.409 And just like Eohaptotis, the notes mention that 00:12:45.409 --> 00:12:48.389 this name is also a Nomen ex dissertationae, 00:12:48.490 --> 00:12:51.370 so it's also sitting in the lobby waiting for 00:12:51.370 --> 00:12:54.870 its official badge. It is. But don't let the 00:12:54.870 --> 00:12:57.509 legal bureaucratic status distract you from the 00:12:57.509 --> 00:13:00.269 biological bombshell here. We went from thinking 00:13:00.269 --> 00:13:03.029 this specific quarry contained one single species 00:13:03.029 --> 00:13:05.629 to realizing it contained three entirely different 00:13:05.629 --> 00:13:08.789 animals. That is wild. You had Eohaptidis, the 00:13:08.789 --> 00:13:11.610 main group. You had Keno -Magnathis. And you 00:13:11.610 --> 00:13:14.110 had Tenuacaptor. That completely changes the 00:13:14.110 --> 00:13:16.210 picture of that ancient world. Yeah. It wasn't 00:13:16.210 --> 00:13:18.909 a monoculture. It was a diverse community. Exactly. 00:13:18.909 --> 00:13:21.110 It's kind of like looking at a blurry photo of 00:13:21.110 --> 00:13:22.980 a crowd and thinking, everyone is wearing the 00:13:22.980 --> 00:13:25.480 exact same gray suit. Then you finally get the 00:13:25.480 --> 00:13:27.659 high res version and you realize, oh, that guy's 00:13:27.659 --> 00:13:29.519 wearing a vest, that guy has a hat, and that 00:13:29.519 --> 00:13:31.580 one is wearing a tuxedo. And that implies they 00:13:31.580 --> 00:13:33.919 were living differently, right? If they are distinct 00:13:33.919 --> 00:13:36.259 species, they probably aren't all eating the 00:13:36.259 --> 00:13:38.419 exact same lunch at the same time. That's the 00:13:38.419 --> 00:13:41.090 major ecological implication, yes. It strongly 00:13:41.090 --> 00:13:43.690 suggests niche partitioning. Niche partitioning. 00:13:43.710 --> 00:13:45.830 Right, meaning they divided up the resources 00:13:45.830 --> 00:13:49.269 so they didn't directly compete. Maybe Caenomagnathus 00:13:49.269 --> 00:13:51.429 has stronger jaws for cracking harder shells 00:13:51.429 --> 00:13:54.409 or taking down tougher prey. Maybe Tenuacaptor 00:13:54.409 --> 00:13:56.750 was lighter and faster and chased down quick 00:13:56.750 --> 00:14:00.049 insects. It shows us that this ecosystem 300 00:14:00.049 --> 00:14:02.809 million years ago was incredibly complex. It 00:14:02.809 --> 00:14:05.029 was a mature food web with different synapsid 00:14:05.029 --> 00:14:07.389 predators finding their own unique ways to survive. 00:14:07.690 --> 00:14:10.799 And all of this came from the exact pile of bones 00:14:10.799 --> 00:14:12.960 that have been sitting in museum drawers since 00:14:12.960 --> 00:14:15.759 the 1970s. That's the beauty of paleontology. 00:14:15.919 --> 00:14:18.200 The bones didn't change at all. Our questions 00:14:18.200 --> 00:14:20.519 changed. Our ability to see the fine details 00:14:20.519 --> 00:14:23.220 changed. So let's zoom out a bit and look at 00:14:23.220 --> 00:14:25.240 the evolutionary neighborhood. We've met the 00:14:25.240 --> 00:14:28.259 cast, Eoheptides, Keno Magnathus, Tenuacaptor. 00:14:28.480 --> 00:14:30.940 Where do they fit in the grand scheme? The source 00:14:30.940 --> 00:14:33.480 provides a cladogram, which is basically an evolutionary 00:14:33.480 --> 00:14:35.860 family tree, and it places them in a specific 00:14:35.860 --> 00:14:39.120 group called Sphynacodontia. Right. So Sphynacodontia 00:14:39.120 --> 00:14:41.659 is the club. It includes our Kansas trio. It 00:14:41.659 --> 00:14:43.539 includes the famous Dimetrodon we talked about 00:14:43.539 --> 00:14:45.779 earlier. It also includes other basal members 00:14:45.779 --> 00:14:49.240 mentioned in the source, like Cutleria. And looking 00:14:49.240 --> 00:14:51.139 at that tree, I see some other great names nearby. 00:14:51.600 --> 00:14:54.620 We have the clade Metapophora and then a group 00:14:54.620 --> 00:14:57.279 called Paleohatteridae. Yes. Paleohatteridae 00:14:57.279 --> 00:14:59.960 is a closely related family on the tree. It includes 00:14:59.960 --> 00:15:02.679 animals like Paleohatteria and the delightfully 00:15:02.679 --> 00:15:05.399 named Pantelosaurus. Pantelosaurus. Yeah. That 00:15:05.399 --> 00:15:07.240 sounds like a dinosaur that plays charades. It 00:15:07.240 --> 00:15:10.179 really does. Yeah. But these groups, Metapophora, 00:15:10.340 --> 00:15:14.580 Paleohatteridae, Sphenicodontia, they represent 00:15:14.580 --> 00:15:17.059 the critical steps on the evolutionary ladder. 00:15:17.200 --> 00:15:19.860 The source lays out the trajectory very clearly. 00:15:20.320 --> 00:15:23.100 You start broad with synapsida. That narrows 00:15:23.100 --> 00:15:25.220 down over millions of years into sphenicodontia. 00:15:25.299 --> 00:15:28.039 That evolves into therapsida. Then synodontia. 00:15:28.139 --> 00:15:31.960 And finally, mammals. Mammals. Us. These creatures 00:15:31.960 --> 00:15:34.860 scrambling around in the Kansas mud, chino magnathus, 00:15:34.860 --> 00:15:37.539 and eohaptidus, they were the experimental phase. 00:15:37.679 --> 00:15:39.860 The rough drafts. Exactly. The rough drafts of 00:15:39.860 --> 00:15:41.840 the mammalian blueprint. They were figuring out 00:15:41.840 --> 00:15:44.159 how to walk efficiently on land, how to process 00:15:44.159 --> 00:15:46.799 food better, how to begin regulating their bodies. 00:15:47.370 --> 00:15:49.850 It's humbling, honestly. You look at the skeletal 00:15:49.850 --> 00:15:51.990 reconstruction of something like Kena Magnathus, 00:15:52.029 --> 00:15:55.529 it has low slung sprawling legs, a big heavy 00:15:55.529 --> 00:15:58.529 head, a long tail, and it looks like a monster. 00:15:59.289 --> 00:16:02.210 But That's family. That's the great grand ancestors 00:16:02.210 --> 00:16:04.549 struggling in the mud so that we could eventually 00:16:04.549 --> 00:16:07.129 sit here and analyze their bones. And that is 00:16:07.129 --> 00:16:09.490 exactly why the taxonomy matters so much. That's 00:16:09.490 --> 00:16:12.049 why Spindler's incredibly tedious work to split 00:16:12.049 --> 00:16:14.549 them up is so important. If we just lump them 00:16:14.549 --> 00:16:16.970 all together as Heptotis, we lose the resolution 00:16:16.970 --> 00:16:20.389 of that history. We miss the diversity. By recognizing 00:16:20.389 --> 00:16:22.210 that there were three different species trying 00:16:22.210 --> 00:16:24.970 three different survival strategies, we literally 00:16:24.970 --> 00:16:27.370 see evolution in action. We are giving them their 00:16:27.370 --> 00:16:30.519 dignity back. even if their real names are currently 00:16:30.519 --> 00:16:32.840 stuck in a dissertation. Science is a process, 00:16:32.919 --> 00:16:35.700 not a destination. So let's recap this journey, 00:16:35.799 --> 00:16:37.419 because we've covered a lot of ground today and 00:16:37.419 --> 00:16:39.720 a lot of mud. We started with a simple question 00:16:39.720 --> 00:16:42.320 about a name in quotation marks. We traveled 00:16:42.320 --> 00:16:45.299 back 304 million years to the Garnett Quarry 00:16:45.299 --> 00:16:47.899 in Kansas. Where we found a nursery of fossils 00:16:47.899 --> 00:16:50.399 that we confidently thought were all one thing. 00:16:51.000 --> 00:16:54.000 Then we watched as modern science basically took 00:16:54.000 --> 00:16:57.240 a sledgehammer to that assumption. We saw the 00:16:57.240 --> 00:16:59.659 original Heptotis named Crumble because it was 00:16:59.659 --> 00:17:02.519 based on bad data from Europe. We saw Eoheptotis 00:17:02.519 --> 00:17:05.420 proposed as a replacement. And then the massive 00:17:05.420 --> 00:17:08.319 plot twist. We saw the population split again 00:17:08.319 --> 00:17:11.799 into Kinomagnathus and Tenuacaptor. We learned 00:17:11.799 --> 00:17:14.220 that a name on a plaque isn't a hard fact. It's 00:17:14.220 --> 00:17:16.200 just the best hypothesis we have at the time. 00:17:16.299 --> 00:17:19.519 That is the ultimate key takeaway here. Heptotis 00:17:19.519 --> 00:17:23.599 was a hypothesis that stood for 40 years. Eoheptotis 00:17:23.599 --> 00:17:26.519 and Kinomagnathus are the new hypotheses. They 00:17:26.519 --> 00:17:28.920 might hold up forever or, you know, in 50 years, 00:17:28.960 --> 00:17:30.680 someone with a new particle scanner might look 00:17:30.680 --> 00:17:32.839 at those exact same bones and find something 00:17:32.839 --> 00:17:35.299 spindler missed. It really makes you wonder what 00:17:35.299 --> 00:17:37.279 else is hiding in plain sight. That is the big 00:17:37.279 --> 00:17:39.180 question that keeps paleontologists awake at 00:17:39.180 --> 00:17:40.779 night. I mean, think about it for a second. We 00:17:40.779 --> 00:17:42.920 talked about the garnet quarry material, but 00:17:42.920 --> 00:17:44.500 think about the Smithsonian. Think about the 00:17:44.500 --> 00:17:46.599 Natural History Museum in London. The endless 00:17:46.599 --> 00:17:48.839 rows of cabinets in the basements that visitors 00:17:48.839 --> 00:17:52.059 never even get to see. There are millions of 00:17:52.059 --> 00:17:54.440 specimens in those collections. Millions. And 00:17:54.440 --> 00:17:57.440 many of them haven't been seriously, rigorously 00:17:57.440 --> 00:18:00.319 examined since the Victorian era. They were dug 00:18:00.319 --> 00:18:03.380 up, tagged, thrown in a drawer, and essentially 00:18:03.380 --> 00:18:05.720 forgotten. How many of them are wearing the wrong 00:18:05.720 --> 00:18:08.700 name tag? How many Hepatitis -style situations 00:18:08.700 --> 00:18:11.400 are sitting there right now? It is almost a statistical 00:18:11.400 --> 00:18:14.059 certainty that there are entirely new species, 00:18:14.359 --> 00:18:17.259 completely unknown animals, sitting in museum 00:18:17.259 --> 00:18:19.940 drawers right this second. They have already 00:18:19.940 --> 00:18:21.880 been discovered, they just haven't been identified 00:18:21.880 --> 00:18:25.299 yet. And that is a wild thought to end on. The 00:18:25.299 --> 00:18:27.500 next massive breakthrough in understanding our 00:18:27.500 --> 00:18:30.240 own origins might not come from a multi -million 00:18:30.240 --> 00:18:32.759 dollar expedition to the Gobi Desert. It might 00:18:32.759 --> 00:18:35.180 literally come from a grad student blowing the 00:18:35.180 --> 00:18:37.559 dust off a cardboard box in a basement in New 00:18:37.559 --> 00:18:40.079 York. The discovery is in the data. You just 00:18:40.079 --> 00:18:42.359 have to look close enough. Well, on that note, 00:18:42.380 --> 00:18:44.039 I think I'm going to look a lot more closely 00:18:44.039 --> 00:18:46.039 at those little brass labels the next time I'm 00:18:46.039 --> 00:18:48.660 at a museum. We are going to wrap up this deep 00:18:48.660 --> 00:18:51.380 dive into the messy, bureaucratic, and completely 00:18:51.380 --> 00:18:54.700 fascinating world of synapsid taxonomy. Thank 00:18:54.700 --> 00:18:56.619 you for helping us decode the quotation marks 00:18:56.619 --> 00:18:59.059 today. Always a pleasure. It's a good reminder 00:18:59.059 --> 00:19:01.680 to always check your sources. Stay curious, everyone. 00:19:02.460 --> 00:19:04.000 We'll catch you on the next deep dive.