Trilobites: Why?

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Re: Trilobites: Why?

Post by Witness » Mon Jul 09, 2018 3:43 am

Pyrrho wrote:
Lots of really excellent pictures in this thread. I extract this Erbenichile trilobite:

Image

Look at these eyes! :shock:

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Re: Trilobites: Why?

Post by ed » Mon Jul 09, 2018 11:02 am

And you are telling me that they couldnt adapt?

We have a word for that: pshaw!
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Re: Trilobites: Why?

Post by sparks » Mon Jul 09, 2018 9:11 pm

Not that they couldn't.

They simply refused to do so.

"When a trilobite gets rabbit in his blood..."
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Re: Trilobites: Why?

Post by Witness » Mon Jul 09, 2018 11:44 pm

Image
Quadrops flexuosa from the Devonian of Morocco. (https://www.amnh.org/our-research/paleo ... te-spines/)
Trilobite Spines

It seems safe to surmise that the life of a trilobite was filled with daunting challenges. From their first days in the Lower Cambrian to their last stand during the Permian, some 270 million years later, there were constant, ever-more-advanced threats facing these primitive arthropods. Their initial evolutionary response to such peril was perhaps the most important… growing a hard, calcite shell, which throughout their long history provided a degree of protection from attacks by sharp-jawed Cambrian sea monsters, five-foot long Silurian aquatic scorpions and razor-toothed Devonian fish.
However, it is what happened next to the trilobite body design that proved to be more revolutionary than evolutionary -- the appearance of a complex, and apparently highly effective, system of spines which eventually emanated from virtually every part of some trilobites' anatomy. Exactly when trilobites started to generate defensive spines is a question still open to scientific speculation and debate. It appears that a few early members of the Olenellid and Redlichid lines, such as Esmeraldina rowei, did possess a rudimentary form of this adaptation. But by the Middle Cambrian, such species as Kootenia randolphi and Olenoides superbus featured an imposing series of spines projecting along their axial lobe.
A number of scientists believe that these initial spines may have been somewhat flexible, and perhaps were used by trilobites as swimming rudders as much as for protection. Some have speculated that spines may have served as nerve-filled sensory organs, increasing a trilobite's ability to “feel” disturbances in the water around them. Others postulate, however, that these primitive projections represented nothing more than the start of an undersea “arms race”, which saw creatures around the globe gearing up for daily battles for survival.
In all honesty, it's not as if the paleontological community had long assumed that trilobites possessed rows of sharp defensive spines. The reason for this is simple; during the first few centuries of trilobite research, dating back as far as the early years of the 1800s, such significant yet fragile morphological features were virtually unknown and usually unseen. Indeed, it wasn't until modern preparation techniques began to flourish in the 1980s that these frequently outrageous arrays of quills, barbs and nodes began to be uncovered in all of their spinose glory.

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Re: Trilobites: Why?

Post by Boss Godfrey » Tue Jul 10, 2018 12:40 am

sparks wrote:Not that they couldn't.

They simply refused to do so.

"When a trilobite gets rabbit in his blood..."
Image

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Re: Trilobites: Why?

Post by Abdul Alhazred » Tue Jul 10, 2018 12:45 am

sparks wrote: "When a trilobite gets rabbit in his blood..."

... it's evidences that the trilobites made it past the Paleozoic after all. 8)
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Re: Trilobites: Why?

Post by Witness » Tue Jul 10, 2018 12:57 am

Break the guns out!

Image

Arthropleura, alas not a trilobite. :(

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Re: Trilobites: Why?

Post by Abdul Alhazred » Tue Jul 10, 2018 9:22 am

But did it eat trilobites? :Hungry2:
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Re: Trilobites: Why?

Post by ed » Tue Jul 10, 2018 11:23 am

Not funny. Trilobies can be triggered too
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Re: Trilobites: Why?

Post by Abdul Alhazred » Tue Jul 10, 2018 12:34 pm

ed wrote:Not funny. Trilobies can be triggered too
Triggered trilobite is even yummier than the regular kind.
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Re: Trilobites: Why?

Post by ed » Tue Jul 10, 2018 3:18 pm

Hmmmm .... but are they Kosher?
Image

I would think not since they are scavengers ,,, but are they? Maybe they were Apex predators.

The mind wobbles.
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Re: Trilobites: Why?

Post by Abdul Alhazred » Tue Jul 10, 2018 3:22 pm

Because they were marine invertebrates.

The Paleozoic era was not a good time to be a Jew, but when was?
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Re: Trilobites: Why?

Post by ed » Tue Jul 10, 2018 3:45 pm

Marine Invertebrates make something non-kosher? Thought it was scales and fins or like that.

This is more complicated than it appears on it's face.

I have too much time on my hands.
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Re: Trilobites: Why?

Post by Abdul Alhazred » Tue Jul 10, 2018 3:52 pm

ed wrote:Marine Invertebrates make something non-kosher? Thought it was scales and fins or like that.

This is more complicated than it appears on it's face.

I have too much time on my hands.
Backwards.

Scales and fins are kosher (provided they are the right kind).

Gotta wait for the Cenozoic era for those. 8)
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Re: Trilobites: Why?

Post by Abdul Alhazred » Tue Jul 10, 2018 3:54 pm

Gefilte trilobite would be nasty, but the big ones might go well with that Chinese style lobster sauce.

As you probably know hailing from Brooklyn, Chinese food is an exception to Kosher laws for some sects of Judaism. :BigGrin3:
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Re: Trilobites: Why?

Post by ed » Tue Jul 10, 2018 3:55 pm

I meant that kosher required scales and fins

But you knew that anyway, didn't you you argumentative prick.

Im coming for you.
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Re: Trilobites: Why?

Post by Abdul Alhazred » Tue Jul 10, 2018 3:57 pm

The smaller trilobites might be good cooked but cold with that sauce they use for shrimp cocktail.
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Re: Trilobites: Why?

Post by ed » Tue Jul 10, 2018 4:06 pm

Thats it.
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Re: Trilobites: Why?

Post by sparks » Tue Jul 10, 2018 9:00 pm

This thread approaches Awesome.

BTW--Steamed Trilobite. It's a lot like lobster. Garlic butter or Hollandaise.
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Re: Trilobites: Why?

Post by Witness » Wed Jul 11, 2018 1:26 am

Image

For the big spiny ones, use the Gypsies' method for hedgehogs: pack in clay, fire till hard, break open – revealing the yummy inside cooked in its own juices.

:Hungry2: