Fossils B/C

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Re: Fossils B/C

Postby dxu46 » October 15th, 2018, 6:38 pm

jlordhe wrote:Can Rocks and Minerals help

Yeah, there are some sedimentary rocks on the Fossils list :)
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Re: Fossils B/C

Postby dxu46 » October 21st, 2018, 12:20 pm

How does one distinguish from Ammonoidea and Dactylioceras? Dactylioceras is an ammonite, so why does the list have both the subclass Ammonoidea and the genus Dactylioceras?
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Re: Fossils B/C

Postby Unome » October 21st, 2018, 12:23 pm

dxu46 wrote:How does one distinguish from Ammonoidea and Dactylioceras? Dactylioceras is an ammonite, so why does the list have both the subclass Ammonoidea and the genus Dactylioceras?

Generally you wouldn't really distinguish them, just note that you might be asked to identify any genus of ammonoid to the subclass level.
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Re: Fossils B/C

Postby dxu46 » October 21st, 2018, 12:29 pm

Unome wrote:
dxu46 wrote:How does one distinguish from Ammonoidea and Dactylioceras? Dactylioceras is an ammonite, so why does the list have both the subclass Ammonoidea and the genus Dactylioceras?

Generally you wouldn't really distinguish them, just note that you might be asked to identify any genus of ammonoid to the subclass level.

Then why is it on the list instead of as a category with specific genuses under it?
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Re: Fossils B/C

Postby UTF-8 U+6211 U+662F » October 21st, 2018, 1:09 pm

dxu46 wrote:
Unome wrote:
dxu46 wrote:How does one distinguish from Ammonoidea and Dactylioceras? Dactylioceras is an ammonite, so why does the list have both the subclass Ammonoidea and the genus Dactylioceras?

Generally you wouldn't really distinguish them, just note that you might be asked to identify any genus of ammonoid to the subclass level.

Then why is it on the list instead of as a category with specific genuses under it?

Probably just because it's numbered and to make it clear that you have to identify ammonoids to the subclass level.

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Re: Fossils B/C

Postby Unome » October 21st, 2018, 1:31 pm

UTF-8 U+6211 U+662F wrote:
dxu46 wrote:
Unome wrote:Generally you wouldn't really distinguish them, just note that you might be asked to identify any genus of ammonoid to the subclass level.

Then why is it on the list instead of as a category with specific genuses under it?

Probably just because it's numbered and to make it clear that you have to identify ammonoids to the subclass level.

Exactly. According to the new rule on taxonomy, if it wasn't in the list you should not be asked to identify the taxon.
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Re: Fossils B/C

Postby dxu46 » October 21st, 2018, 1:39 pm

Unome wrote:
UTF-8 U+6211 U+662F wrote:
dxu46 wrote:Then why is it on the list instead of as a category with specific genuses under it?

Probably just because it's numbered and to make it clear that you have to identify ammonoids to the subclass level.

Exactly. According to the new rule on taxonomy, if it wasn't in the list you should not be asked to identify the taxon.

But then why is Ammonoidea an identifiable class and not, say, Gastropoda?
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Re: Fossils B/C

Postby UTF-8 U+6211 U+662F » October 21st, 2018, 1:41 pm

dxu46 wrote:
Unome wrote:
UTF-8 U+6211 U+662F wrote:Probably just because it's numbered and to make it clear that you have to identify ammonoids to the subclass level.

Exactly. According to the new rule on taxonomy, if it wasn't in the list you should not be asked to identify the taxon.

But then why is Ammonoidea an identifiable class and not, say, Gastropoda?

By the almighty wisdom of the rules council

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Re: Fossils B/C

Postby Unome » October 21st, 2018, 2:00 pm

UTF-8 U+6211 U+662F wrote:
dxu46 wrote:
Unome wrote:Exactly. According to the new rule on taxonomy, if it wasn't in the list you should not be asked to identify the taxon.

But then why is Ammonoidea an identifiable class and not, say, Gastropoda?

By the almighty wisdom of the rules council

They are all identifiable classes. Reread 3.d.ii.
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Re: Fossils B/C

Postby UTF-8 U+6211 U+662F » October 21st, 2018, 2:09 pm

Unome wrote:
UTF-8 U+6211 U+662F wrote:
dxu46 wrote:But then why is Ammonoidea an identifiable class and not, say, Gastropoda?

By the almighty wisdom of the rules council

They are all identifiable classes. Reread 3.d.ii.

I disagree. It just says "taxonomic classification". I assume that means classifying identifiable specimens according to the taxonomy on the list.

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Re: Fossils B/C

Postby Unome » October 21st, 2018, 4:11 pm

UTF-8 U+6211 U+662F wrote:
Unome wrote:
UTF-8 U+6211 U+662F wrote:By the almighty wisdom of the rules council

They are all identifiable classes. Reread 3.d.ii.

I disagree. It just says "taxonomic classification". I assume that means classifying identifiable specimens according to the taxonomy on the list.

Sorry, I meant to say 3.d.i, with my point being that non-numbered taxa on the list such as Gastropoda can be asked as ID.
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Re: Fossils B/C

Postby UTF-8 U+6211 U+662F » October 21st, 2018, 6:31 pm

Unome wrote:
UTF-8 U+6211 U+662F wrote:
Unome wrote:They are all identifiable classes. Reread 3.d.ii.

I disagree. It just says "taxonomic classification". I assume that means classifying identifiable specimens according to the taxonomy on the list.

Sorry, I meant to say 3.d.i, with my point being that non-numbered taxa on the list such as Gastropoda can be asked as ID.

Hmm it says "Numbers indicate that members of that taxon rank should be identifiable to that level" so I'm not sure actually

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Re: Fossils B/C

Postby Unome » October 21st, 2018, 7:01 pm

UTF-8 U+6211 U+662F wrote:
Unome wrote:
UTF-8 U+6211 U+662F wrote:I disagree. It just says "taxonomic classification". I assume that means classifying identifiable specimens according to the taxonomy on the list.

Sorry, I meant to say 3.d.i, with my point being that non-numbered taxa on the list such as Gastropoda can be asked as ID.

Hmm it says "Numbers indicate that members of that taxon rank should be identifiable to that level" so I'm not sure actually

Your interpretation would prevent asking, for example, to identify a specimen as a brachiopod. I suspect that's not the intention. That statement on the list is a little ambiguous though.
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Re: Fossils B/C

Postby Unome » October 24th, 2018, 11:23 am

For those interested, UGA posted their invitational tests, which include the Fossils test that I wrote.

Link to tests folder

The high score was around 70 points, with the typical quick drop-off near the top.
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Re: Fossils B/C

Postby Rock&Roll92 » October 25th, 2018, 5:45 pm

What would be some good resources
to find information for each genus, class, order, etc?


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