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Stasis: Earliest known mammals 160 mya a lot like modern mammals in diversity, say researchers

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Docofossor (left) and Agilodocodon (right)/Zhe-Xi Luo, U Chicago

While we are on the subject of stasis (Stasis: Ferns separated 60 million years interbreed), from ScienceDaily:

The fossils of two interrelated ancestral mammals, newly discovered in China, suggest that the wide-ranging ecological diversity of modern mammals had a precedent more than 160 million years ago.

With claws for climbing and teeth adapted for a tree sap diet, Agilodocodon scansorius is the earliest-known tree-dwelling mammaliaform (long-extinct relatives of modern mammals). The other fossil, Docofossor brachydactylus, is the earliest-known subterranean mammaliaform, possessing multiple adaptations similar to African golden moles such as shovel-like paws. Docofossor also has distinct skeletal features that resemble patterns shaped by genes identified in living mammals, suggesting these genetic mechanisms operated long before the rise of modern mammals.

So the cast changed, but Hamlet is still the same play.

“We consistently find with every new fossil that the earliest mammals were just as diverse in both feeding and locomotor adaptations as modern mammals,” said Zhe-Xi Luo, PhD, professor of organismal biology and anatomy at the University of Chicago and an author on both papers. “The groundwork for mammalian success today appears to have been laid long ago.”

Early mammals were once thought to have limited ecological opportunities to diversify during the dinosaur-dominated Mesozoic era. However, Agilodocodon, Docofossor and numerous other fossils — including Castorocauda, a swimming, fish-eating mammaliaform described by Luo and colleagues in 2006 — provide strong evidence that ancestral mammals adapted to wide-ranging environments despite competition from dinosaurs.

“We know that modern mammals are spectacularly diverse, but it was unknown whether early mammals managed to diversify in the same way,” Luo said. “These new fossils help demonstrate that early mammals did indeed have a wide range of ecological diversity. It appears dinosaurs did not dominate the Mesozoic landscape as much as previously thought.”

The problem today is not that the dominant neo-Darwinian theory is wrong; it’s more like this: The price of its being right is scientific meaninglessness.

It amounts to: Life changes over time, or maybe doesn’t.

Science is supposed to amount to more than this.

So nothing remains but endangering the careers of those who point out that fact. And cramming it all down the yawp of the failing public school system. Oh yes, and hounding Republicans running for office about what they believe  about “evolution.”

It is the fast track to cultural relevance without scientific relevance.

That does not make Darwin’s theory or his followers irrelevant. Their relevance rather becomes the way they twist people’s ideas of what science is supposed to be.

Note: “Early mammals were once thought to have limited ecological opportunities to diversify during the dinosaur-dominated Mesozoic era.” Yes, that was “once thought” because everything depended on Darwinian thinking. And Darwin was wrong. But that doesn’t matter. Darwin is right.

Where is evolution when we need it?

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Comments
The Central Law of Uncommon Descent: Whatever News writes in the headline, the science article she's referring to (which she never reads) will say the opposite. If she says stasis, there's no stasis. If she says mammals, there are no mammals. If she says they're similar in diversity, they're not similar in diversity. Just a typical post at Uncommon Descent. Move along folks. Nothing to see here.Diogenes
February 18, 2015
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Another nail in the coffin of young earth creationism.Mung
February 17, 2015
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Yes, most likely my explanation fails and the "stasis" refers to the diversity- as Piotr said in comment 2.Joe
February 16, 2015
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Joe @29 - your explanation does not hold. News, and you, are clearly confused about usage of the terms 'stasis', 'divergence', and 'diversity'.Hangonasec
February 16, 2015
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If my explanation holds then the title is accurate. Context matters, skramJoe
February 16, 2015
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"That these ancient mammaliaforms had similar developmental patterns is an evidence that these gene networks could have functioned in a similar way long true mammals evolved" Stasis in developmental patterns equals stasis in thread title.ppolish
February 16, 2015
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Joe, either the title accurate or it isn't. What is the third option that you allude to? :)skram
February 16, 2015
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Only in your little bitty mind, skram.Joe
February 16, 2015
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I agree, Joe, that not all questions have a simple yes or no answer. This one does, though. :)skram
February 16, 2015
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An explanation is an answer, skram. Not everything has to be "yes or no". As I have said, obviously you are in over your head.Joe
February 16, 2015
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Piotr, If you are too stupid to understand what I posted in comment 7 then just say so.Joe
February 16, 2015
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An evasion is not an answer, Joe.skram
February 16, 2015
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skram, My explanation should suffice to a person of average or better intelligence.Joe
February 16, 2015
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#7 Joe, If News wanted to give an example of "no stasis", she should have written "No stasis" in the title. As it stands, the title suggests the opposite of what we see. The remaining two errors are just factual. By the way, the fact that the ferns discussed earlier were able to hybridise doesn't mean that there has been "no diversity" or "no change". Of course they have diverged. Cystocarpium turns out to be a natural hybrid between Gymnocarpium dryopteris and a tetraploid varietry of Cystopteris fragilis -- two species classified in different genera, and not even very similar to each other (see the photos). They don't hybridise all the time -- otherwise there would be plenty of different hybrids around. It just so happens that the reproductive barrier between them is not absolutely watertight despite the long divergence time, which is remarkable (and may qualify as a world record) but not impossible.Piotr
February 16, 2015
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No, Joe, since you aren't saying yes or no, you haven't answered my question. You have evaded it.skram
February 16, 2015
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skram, that answers your question. Don't blame me for your inability to read and think.Joe
February 16, 2015
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That's not an answer to my question, Joe. Let me try again. :) Is the title accurate or does it contain as many as three errors? It's a simple question, Joe, and there are two possible answers. One is yes, the other is no. Give it a try!skram
February 16, 2015
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If you had an IQ over 75 you would have understood it answered your question. My take is News was posting contrasting stories- one in which no diversity was observed and one in which unimagined diversity was observed. News was pointing out that evolutionism can “explain” both stasis and unimagined diversity with relative ease.Joe
February 16, 2015
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That was not an answer to my question, Joe. Either the title is accurate or it is in error. Piotr has pointed out what he thinks are 3 errors. That would make the title inaccurate. Do you agree or disagree with Piotr's assessment?skram
February 16, 2015
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LoL! Obviously you are too stupid to discuss this then. My answer to your question is in comment 7. If you can't figure it out that is your problem and exposes your agenda.Joe
February 16, 2015
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I can't quite make it out, Joe: do you agree that there are 3 errors in the title or do you not?skram
February 16, 2015
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skram, read comment 7 and buy a vowelJoe
February 16, 2015
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The other fossil, Docofossor brachydactylus, is the earliest-known subterranean mammaliaform, possessing multiple adaptations similar to African golden moles such as shovel-like paws. Docofossor also has distinct skeletal features that resemble patterns shaped by genes identified in living mammals, suggesting these genetic mechanisms operated long before the rise of modern mammals.
Science writers are learning how to tip-toe around the problem areas. It has "distinct skeletal features that resemble" ... skeletal features we see in living mammals today? No, we better not say it that way. Instead, they "resemble patterns shaped by genes". Ok, great. We're just talking about genetic similarity not stasis in development of shovel-like paws evident "long before the rise of modern mammals".Silver Asiatic
February 16, 2015
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Are you going to dispute the errors in the title, Joe? Do you think the title is accurate? :)skram
February 16, 2015
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skram can't read- as if we needed more evidence for that.Joe
February 16, 2015
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Whatever the merits of evolutionary theory, Joe, the title is still wrong. :)skram
February 16, 2015
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#6 Ignorant Piotr:
What you can or cannot find is off-topic.
The fact that your position cannot account for mammals is on-topic. That means your position cannot account for any radiation- adaptive or not. My take is News was posting contrasting stories- one in which no diversity was observed and one in which unimagined diversity was observed. News was pointing out that evolutionism can "explain" both stasis and unimagined diversity with relative ease.Joe
February 16, 2015
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#5 Knee Jerk Joe, What you can or cannot find is off-topic. The title is wrong on several counts, and News would do well to correct it. She begins like this:
While we are on the subject of stasis...
-- and goes on to report something that has nothing to do with stasis. Why, the fact that we are dealing with an adaptive radiation of early mammals already 160 Mya (anticipating a still more massive radiation 100 My later) is the very antithesis of stasis. Stasis means "no change", not "a lot of change, and then a heck of a lot more change".Piotr
February 16, 2015
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I can find more errors with evolutionism than I can with the title, Piotr. Unguided evolution cannot explain mammals, mammaliaform nor any animal. So that would be a problem. Unguided evolution cannot get beyond populations of prokaryotes GIVEN starting populations of prokaryotes.Joe
February 16, 2015
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How many errors can you spot in this headline? 1. This is not an example of stasis. 2. The two critters are not the earliest known mammals (or mammaliaforms, if one wants to be pedantic about taxonomy). 3. The known diversity of Middle Jurassic mammals/mammaliaforms could be compared to that of some living families, e.g. mustelids*, but is not even remotely like the full diversity of modern mammals. Where are the Jurassic mammalian analogues of modern whales, bats, horses, giraffes, elephants, lions, apes, etc.? --------- * Mustelids include tree-climbers, burrowers, swimmers, and even one fully marine species; some hunt big game, some eat fish, some will eat anything, from fruit and honey to snakes; some are tiny, some are large. True, no mustelid can glide like Volaticotherium, but they show other specialisations to compensate for that gap.Piotr
February 16, 2015
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