Fossils B/C

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Re: Fossils B/C

Postby kaorevillo » Thu Feb 04, 2016 2:33 am

I know this question sounds really stupid but... are genus favistina and genus favosites the same thing? I found both in different sources and they have very similar descriptions and I wanted to know for sure. Thanks! :D :D :D

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Re: Fossils B/C

Postby humanbeingofearth548 » Thu Feb 04, 2016 4:21 am

GoofyFoofer wrote:
humanbeingofearth548 wrote:Has anyone ever had a test where in a station they would make you speed ID and categorize random invertebrates into phylums (or was it classes?) and make you count how many of them there were in each?

I had that last year in... the Muscatel invite, I think?

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Re: Fossils B/C

Postby Magikarpmaster629 » Fri Feb 05, 2016 12:58 am

kaorevillo wrote:I know this question sounds really stupid but... are genus favistina and genus favosites the same thing? I found both in different sources and they have very similar descriptions and I wanted to know for sure. Thanks! :D :D :D

From what I found it appears they are different, but favistina isn't as well known as favosites. Since favistina isn't on the list I'd suggest simply not taking info from pages about favistina.
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Re: Fossils B/C

Postby GoofyFoofer » Sat Feb 06, 2016 11:23 pm

humanbeingofearth548 wrote:
GoofyFoofer wrote:
humanbeingofearth548 wrote:Has anyone ever had a test where in a station they would make you speed ID and categorize random invertebrates into phylums (or was it classes?) and make you count how many of them there were in each?

I had that last year in... the Muscatel invite, I think?

Oh you were there for it?! I was too! :D

Nice! Were you the team that stole the gold in fossils? :x ;)
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Re: Fossils B/C

Postby humanbeingofearth548 » Thu Feb 11, 2016 4:11 am

GoofyFoofer wrote:
humanbeingofearth548 wrote:
GoofyFoofer wrote:I had that last year in... the Muscatel invite, I think?

Oh you were there for it?! I was too! :D

Nice! Were you the team that stole the gold in fossils? :x ;)

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Re: Fossils B/C

Postby living_fossil » Fri Feb 12, 2016 11:57 pm

Is there a specific source that science olympiad uses for taxonomy? I've noticed that sometimes it varies from source to source.

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Re: Fossils B/C

Postby chaguy2457 » Sat Feb 13, 2016 12:02 am

living_fossil wrote:Is there a specific source that science olympiad uses for taxonomy? I've noticed that sometimes it varies from source to source.


The tests I have seen don't ask for taxonomy that isn't on the list.
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Re: Fossils B/C

Postby Entomology » Mon Feb 15, 2016 8:28 pm

chaguy2457 wrote:
living_fossil wrote:Is there a specific source that science olympiad uses for taxonomy? I've noticed that sometimes it varies from source to source.


The tests I have seen don't ask for taxonomy that isn't on the list.



Our coaches tell us to have just the basic kingdom, phylum, class, order, family and such, but some tests have asked for the subphylum or subclass.
I generally just use Wikipedia for classification (the test makers usually rely on that) and then cross check my answers with a more reliable source.
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Re: Fossils B/C

Postby Unome » Mon Feb 15, 2016 9:02 pm

Entomology wrote:I generally just use Wikipedia for classification (the test makers usually rely on that)

Who are these test makers? I tend to go with other sources since most people writing tests (at least at Regional and State tournaments) tend to be professors, and (in my judgement) tend not to use Wikipedia.
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Re: Fossils B/C

Postby GoofyFoofer » Sat Feb 20, 2016 5:08 pm

Unome wrote:
Entomology wrote:I generally just use Wikipedia for classification (the test makers usually rely on that)

Who are these test makers? I tend to go with other sources since most people writing tests (at least at Regional and State tournaments) tend to be professors, and (in my judgement) tend not to use Wikipedia.


Lazy people, people like me. :D

I tend to use the field guides first, because the SO test makers use it for info.
Typically, I'll use Wikipedia if no other source is available online or on paper.
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Re: Fossils B/C

Postby JoJoKeKe » Mon Feb 29, 2016 1:28 am

This is a silly question- but are those in Class Asteroidea sessile or benthic? I know that most echinoderms are sessile, but any extra information is helpful.

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Re: Fossils B/C

Postby Magikarpmaster629 » Mon Feb 29, 2016 1:32 am

JoJoKeKe wrote:This is a silly question- but are those in Class Asteroidea sessile or benthic? I know that most echinoderms are sessile, but any extra information is helpful.

Thank you! :)

Benthic. Think of what kinds of things they eat- they need to move around.
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Re: Fossils B/C

Postby GoofyFoofer » Mon Feb 29, 2016 1:42 am

Magikarpmaster629 wrote:
JoJoKeKe wrote:This is a silly question- but are those in Class Asteroidea sessile or benthic? I know that most echinoderms are sessile, but any extra information is helpful.

Thank you! :)

Benthic. Think of what kinds of things they eat- they need to move around.

Don't all echinoderms move?

EDIT: *nearly :lol:
Last edited by GoofyFoofer on Mon Feb 29, 2016 4:58 am, edited 1 time in total.
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Re: Fossils B/C

Postby JoJoKeKe » Mon Feb 29, 2016 1:47 am

GoofyFoofer wrote:
Magikarpmaster629 wrote:
JoJoKeKe wrote:This is a silly question- but are those in Class Asteroidea sessile or benthic? I know that most echinoderms are sessile, but any extra information is helpful.

Thank you! :)

Benthic. Think of what kinds of things they eat- they need to move around.

Don't all echinoderms move?


Well, aren't Crinoids and Blastoids sessile? My knowledge on the echinoderms is lacking, so I'm trying to fill in the blanks. Any help is greatly appreciated.

(In addition, could anyone concisely explain to me the differences between mollusk and brachiopod shells directly relating to shell structure?)
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Re: Fossils B/C

Postby Magikarpmaster629 » Mon Feb 29, 2016 2:32 am

JoJoKeKe wrote:(In addition, could anyone concisely explain to me the differences between mollusk and brachiopod shells directly relating to shell structure?)

This isn't always consistent- a problem with morphological taxonomy, but this is generally how it is put: (also when you say mollusc I assume you mean bivalve)

Imagine a plane cutting across the ridge separating the shell in both the brachiopods and the bivalves. There is no problem with this, seeing how both groups have a rough line on the border of each valve. But the symmetry for this is inconsistent; the bivalve is (in general, but not always) symmetrical on both sides of the plane, however the brachiopod is not (again, not always the case). Now imagine twisting the plane 90 degrees along the y-axis, so it cuts each shell in half from a top-down view. Now the brachiopod is symmetrical, and the bivalve is not (you'll notice Genus Pecten on the list does not follow this rule- it is symmetrical both ways).
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