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a good read...

thomas davis Nov 20, 2009 11:02 PM

http://forums.kingsnake.com/view.php?id=1540262,1540262

of course my favorite part is...

The
large range of overlap and frequent lack of diagnosable
morphological characters within and between these
groups of Lampropeltis may have obscured inferences of
phylogenetic relationships among these species and produced
erroneous taxonomic classiWcations for over 80
years.

is that a fancy way of saying OOPS,,,,,,,thomas davis
mexicana article

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Morphs... just like baseball cards BUT ALIVE, how cool is that???

my website www.barmollysplace.com

Replies (20)

Jlassiter Nov 20, 2009 11:31 PM

That is a great read....I've read it many times since it appeared nearly 4 years ago.....
Check out Robert Hansen's site....ALL of the Mexicana papers are there....it is a very problematic complex, I am glad there are folks out there trying to straighten it out.....

The focal point on that paper to me is....
That Mexicana is not a separate species according to their data.
Thayeri are more closely related to Alterna and Northern Clade Triangulum.

And Mex Mex and Greeri are closely related to Ruthveni and Southern Clade Triangulum...

It is a very intersting and is still in the works.

So according to mtDNA evidence Greeri, Mex Mex, Thayeri and Ruthveni are not all the same.......
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John Lassiter
Poor planning and procrastination on your part does not constitute an emergency on my part...

brhaco Nov 21, 2009 07:35 AM

I'm no taxonomist myself, but this paper is controversial among those who ARE. Many would have rather seen comparisons of nuclear DNA rather than mitochondrial (which is only inherited maternally).

Interesting but very preliminary results, I would say.
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Brad Chambers
WWW.HCU-TX.ORG

"Some things are flat impossible-until they're done."
Robert A. Heinlein

FR Nov 21, 2009 08:56 AM

Its still a big whoops, with such a group, you cannot only include one individual from each of a very few locals. For instance with Thayeri, there may be a tight relationship in certain but not all locals, with triangulum. I.E. intergration zones. But not all locals, I.E. high elevation populations. Not enough animals. Then to use captive animals, hmmmmmmm WRONG. Why do they do this, are they friggin to lazy to gather their own data. Or are they too cheap, no, no, I get it, it would take too much time!

Next,

So before you attempt to figure out the whole we would need to figure out the small parts of this group.

I was part of the field work on Garskas paper and did get to observe much of the preserved material. Even thought I was part of his paper, I did not agree on much of what he had to say.

Next,

Also the assumption of mimicry(mentioned in this paper) is naive and prejudiced. Again, humans are not natural predators so we do not count, mimicry works on us. Their natural predators do not have such a problem. Their predators TAKE corals as well as kings without hesitation.

Its very very clear that the tricolored patterns are very successful with fossorial snakes. It appears to have benefit where snakes live "in" and not "on" our earth. How many surface active species of snakes are tricolored???? So where do you guys think of the patterns of wormsnakes and blindsnakes come from? Do you base your thoughts with those species on what happens on the surface. You can catch both on the surface like tricolors.

Its our mistake that all animals live like us, on the surface of the earth. These tricolors like in and under the surface of the earth. They have huge populations where very few individuals surface for us to find them.

If we were at a herp show bar, I would explain it this way, If sharks were the dominate intelligent species and they collected humans snorkling and kept them in tanks of water. They would soon find the humans could not survive after a while. Yet, without question the sharks did find them in the water, therefore these humans must be aquatic.

Then the sharks related everything they saw with these humans in a shark aquatic way, (Condritpromorpism) Yet the reality is, the vast majority of humans are not in the water and were not developed for the water. But the sharks refuse to look at them as land dwellers, after all, they found them in the water. Those sharks are so boneheaded.

This is true with fossorial snakes. The vast percentage of these kings are underground AT ALL TIMES. With much less then one percent on the surface at any time. So how could surface pressures have any strong influence on what these underground animals do???????? Particularly with color and pattern. Their color and pattern is developed to be of benefit UNDERGROUND, where they LIVE.

Lastly even the effects of surface predation is naive and biased. Most surface predators do not SEE how we see. They use other organs, like smell(and other senses we do not understand). They without question view the world in a much different manner then us. They see the world through a landscape of smells and visions(even infra-red).

Of course, cryptic species could very well be controlled by birds who do hunt with vision. But to think a fossorial species are controlled by visual predators is VERY naive of us and highly anthropromorphic. Mammalian and reptilian predators mostly hunt in the dark, and use smell as a key to locating prey. Hmmmmmmmmmm do snakes mimic their smell as well?

Then the thought of absolute enters the equation. Snakes are combinations of these things, not all one or the other.

Lastly, the use of dna is ok, but its only analyzing small parts, in most cases, very very very small parts. When it comes to the makeup of a whole animals, there are millions and millions of small parts included in each animal.

These parts are a reflection of useage. They reflect what is needed for an animal to exsist in its enviornment. This is also a reflection of BEHAVIOR. Behavior drives usage and therefore the development of parts. Yet, behavior is not part of taxonomy. There is a problem here, as behavior and physical adaption are fused and are indeed one. The problem here is, behavior cannot be found with a knife. You cannot cut an animal open and analyze behavior.

So we are saying that parts tell you about behavior, yet its behavior that drives parts.

The point I am making here is, taxonomy is suppose to give us an understanding of an animal, the whole animal. Again, the WHOLE animal. But instead of looking at the whole animals, we take our understanding from a very powerful microscope. Hmmmmmmmmmmmm we are indeed missing the big picture, THE FRIGGIN WHOLE ANIMAL. We should not take our understanding from a tiny piece of an animal buried in an onion skin of genetic history which contains tens of thousands of other bits we do not use.

I do understand the problem. I guess most people cannot understand what an animal is or does, so they must take their understanding from a very small part of a small part of a small part. Hmmmmmmmmmmm that scares me. Cheers

brhaco Nov 21, 2009 10:14 AM

Frank-that was a "mini" rant?

But I'm in substantial agreement. Nowhere in science are such sweeping pronouncements made on such a shaky foundation as is the case in taxonomy-particularly reptile taxonomy!
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Brad Chambers
WWW.HCU-TX.ORG

"Some things are flat impossible-until they're done."
Robert A. Heinlein

antelope Nov 21, 2009 10:32 AM

I agree with both brad and FR, we know about as much of these animals as the parts we use to define them. If we take in all the methods and apply it all, we still find ourselves looking for answers. This is why we haven't found and colonized other planets yet, we don't yet understand completely the one we are on, and all the nuances that go with keeping it in good working order, lol!

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Todd Hughes

rogue_reptiles Nov 21, 2009 10:56 AM

"Nowhere in science are such sweeping pronouncements made on such a shaky foundation as is the case in taxonomy-particularly reptile taxonomy!"

I can definitely agree with that statement Brad, but it also applies to the "old" taxonomy, based solely on morphology, as well. One thing I think we can all agree on is that the current taxonomy of mexicana and triangulum needs some serious revisions.

I can agree with Frank that several factors need to be considered, morphology, DNA, behavior, habitat, etc... rather than just one. I would like to know which animals in this paper Frank thinks weren't wild caught. I see where this paper criticizes another paper (Hilken & Schlepper) for using pet trade animals.

This paper, unlike the Pyron & Burbrink getula paper, makes no recommendations to change the current taxonomy. I think it justifiably questions the current taxonomy and suggests further study is necessary.

I think its an interesting paper that ask more questions than it attempts to provide answers. Bryson is doing some awesome work with Mexican herpetofauna. I hope he does eventually make some recommendations to change the current taxonomy of mexicana and triangulum.

Greg Huston

Jlassiter Nov 21, 2009 10:47 AM

I agree.....There were limited specimens used to come to such a hasty conclusion....

Thanks for the rant Frank.....
-----
John Lassiter
Poor planning and procrastination on your part does not constitute an emergency on my part...

Joe Forks Nov 21, 2009 12:45 PM

>>with Thayeri, there may be a tight relationship in certain but not all locals, with triangulum. I.E. intergration zones. But not all locals, I.E. high elevation populations.

That's exactly right Frank.

>>Not enough animals.

Again, exactly right. Poorly sampled from the known range, and vast expanses of geography with NO samples. That is a significant fact, but even the existing samples are poorly understood.

No classification system will EVER adequately convey how these animals evolved, mixed, re-evolved in a changed environment, and mixed with something else over thousands or in some cases millions of years.

Alterna, thayeri, and triangulum have a long history of mixing, and back breeding. Alterna and thayeri are still mixing today.
-----
Herp Conservation Unlimited
Conservation through captive propagation
Mexicana Group Directory
Photography by Joseph E. Forks

runswithturtles Nov 21, 2009 01:09 PM

I agree with what FR and Brad said as well as what Joe said. I think if we are going to make DNA testing the gospel truth of science then we need to make sure they are being thorough enough to be accurate. Not enough speciemens collected over all of the range is bad enough to leave big holes in any study. But then only the mothers side (female lineage) DNA was tested too. This means only half of the family tree was traced. So we end up with only half of the actual DNA of these animals being known and only from a few spotty localities within the range. Not enough for me period. I would expect better from science but then I am getting used to this kind of science these days. Eric

runswithturtles Nov 21, 2009 01:16 PM

Sorry, that should read "not enough specimens NOT collected over all of the range." Eric

varanid Nov 21, 2009 05:15 PM

the problem with taxonomy is that it attempts to apply one fixed label to a group of organisms that are always changing and evolving. Describing the relationships between a group of animals with a fixed term may be the easiest way, but it's also like taking a snapshot of major city, and saying that this is what the city is, now and forever. It doesn't easily allow for an expression of that change.

Jeff Schofield Nov 21, 2009 01:26 PM

Do I read this right? Its an opinion of an opinion of a bad interpretation right? Not sure anything productive can be made of this info one way or another.

FR Nov 21, 2009 07:01 PM

Overall, I think genus and species should be rather simple and useful. While mexicana are polymorphic, they are still mexicana.

When I found the first black thayeri, I said, it smells like a mexicana. It did! hahahahahahahahahahaha and that is true.

As science gets more and more complicate and gets inside the animals cells, I think new catagroies need to be coined to show evolutionary relationships.

Like with getula, the groups that may gain new species names, ARE STILL getula. They are more alike eachother then they are alike any other snakes. So why make them different species. Make them different evolutionary stock, a new name or something other then species.

I think we should be able to look up a kingsnake like these different getula and have the scientific name tell us they are kingsnakes(lampropeltis) and what type of kingsnake(getula). Then if we wanted to investigate farther, nave other catagories like the old subspecies or something that tells us they are different. Did I do something nasty by bringing up something old like subspecies?

How about changing the difinition of subspecies to include DNA ranking. Cheers

runswithturtles Nov 22, 2009 11:51 AM

FR, that all sounds good to me, it is pretty clear that something needs to be done. Even the old idea that two species can't breed and reproduce or if they do the offspring will be infertile is wrong. Or at least it is wrong if we except the way things are classified now.
Don't get me wrong, I think we need way more genetic testing. I think genetics is a valid part of finding the pieces of the puzzle.
But, all too often a study is done and before they have been thorough enough and really tested enough specimens and or enough of them over enough of the range and so on, I see they publish there findings in a way as to make it look like they have solved the puzzle altogether, when in fact all they did is find another piece to the puzzle.
We need a system that uses all of the different types of information and sheds light on the pieces together. Anytime we just look too hard at only one piece we miss a lot and get to going in the wrong direction again.

Point in case. There was a DNA study done to find and map the origins of human populations. A man that was clearly African American was among those tested. His results came back and lo and behold the data said he was Caucasian. Yet he had dark skin, had black kinked hair and brown eyes. He thought of himself as African American and as far back in his family as he knew all of his ancestors were African American.
So how did this happen? Well they had only tested the male side of the DNA in his family tree and one of his Great, Great Grandfathers was a Caucasian man.
When the mothers side of the DNA was tested of course it came back African American. But if we were just looking at the piece of paper that said he was Caucasian then wouldn't you be surprised at who showed up for dinner when you actually saw him?
After several generations of diluting the genes from his Causation great, great grandfather with African American genes the family tree had lost the Caucasian look but still retained some of the genes.
The thing is the data is important but how you take it read it and interpret it is what makes all of the difference.

Most if not all of the species we have today are relict hybrids from past hybridizations. Nature pushes things together and then pulls them apart again. When populations are put under stress hybridizing becomes more frequent. This is probably natures way of making sure that in case neither parent types can make it through the stress that there hybrid offspring that have a wider gene base have a better chance of making it through the tuff times. It is a complex puzzle and will take more than one study of one side of the DNA to figure it out. Eric

FR Nov 22, 2009 01:41 PM

I have nothing against genetics, even in its primitive state(i imagine its going to get a lot better).

What I disagree with is screwing up the usefulness of scientific names. Take C.viridis in the rattlesnakes. They separated them into different species. So if someone not familar with rattlesnakes looks them up, A V.helleri is as different from a sidewinder as it is to a northen pacific(Oreganus). Or as apart as willardi! which is wrong and silly.

The viridis group are more similar to eachother then to other species, so that should be recognized.

On another forum, I asked, who are these Scientific for. One person said, you can read the new names, then look up four or five papers then you will understand it. hmmmmmmmmmmmmm well thats stupid. The utility of the name in the first place is to offer some understanding. If not, then why not have the name be, Lampropeltis, then followed by all manner of citations.

The truth is, if any of us picked up a getula king, we would know its a getula king and we would not have to look up anything. We may wonder which one it is from color/pattern or locality. But we will know its a common king. On the otherhand if a bird person picks one up, then looks it up and by local its called L.splendida, but it looks odd, maybe a Hybrid with holbrooki. Hybrid???????? Oh you mean intergrade or intermediate, but They will soon be Hybrids. And you know how we hate that? Cheers

runswithturtles Nov 22, 2009 02:02 PM

There is a big trend to remove the subspecies status and make everything fit into a species level it seams.
I hybridize plants and work with a lot of I. Hexagonae (Louisiana Irises) and have or was involved in a running debate over origins, genetics, and species versus subspecies status and so on for more than three years! One real long debate!
I learned a lot from it. One of those things was how messed up taxonomy is getting. There is a subspecies category for a reason. Eric

thomas davis Nov 22, 2009 09:47 PM

>>>How about changing the difinition of subspecies to include DNA ranking.>>>

makes sense, probably why it hasnt happened. well that and peoples careers along with their integrity, lines of thinking and most improtant FUNDS would probably end. common sense isnt a money making venture and thus why its so uncommon. ihmo taxonomy is nothing more than a business now justifying its existance by splitting hairs all the while being completely clueless, kinda like our government.
,,,,,,,,,thomas davis
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Morphs... just like baseball cards BUT ALIVE, how cool is that???

my website www.barmollysplace.com

JKruse Nov 21, 2009 09:49 PM

just when I was getting excited over "webbi".......
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Jerry Kruse

And God said, "Let there be zonata subspecies for all to ponder..."

Jlassiter Nov 21, 2009 10:24 PM

I, myself am still excited about Webbi....
This four year old paper didn't change anything for me no matter how many times I've read it....LOL

Maybe that was sarcastic typing on your part...hahaha
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John Lassiter
Poor planning and procrastination on your part does not constitute an emergency on my part...

DMong Nov 21, 2009 10:28 PM

Jerry is never sarcastic!(I was just being sarcastic..LOL!)

~Doug
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"a snake in the grass is a GOOD thing"

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