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Re: Fossils B/C
Posted: December 15th, 2009, 12:53 pm
by oh joy
are fusulinids a Class or a family...etc?what is it?
Re: Fossils B/C
Posted: December 15th, 2009, 2:46 pm
by jazzy009
oh joy wrote:are fusulinids a Class or a family...etc?what is it?
it is a genus/common name, most of the list is set up like that
Re: Fossils B/C
Posted: December 16th, 2009, 12:59 pm
by oh joy
what about diatoms? what are they(class, family...?) ?
Re: Fossils B/C
Posted: December 16th, 2009, 2:24 pm
by jazzy009
oh joy wrote:what about diatoms? what are they(class, family...?) ?
Haha, shall we go down the list?
http://en.wikipedia.org/wiki/Diatom
That site is good for basic knowledge.
Re: Fossils B/C
Posted: December 16th, 2009, 3:35 pm
by amerikestrel
Does anyone have a good picture of a jawless fish (agnatha) fossil? I can't seem to find any...
Edit: Never mind, I found one that works.
Re: Fossils B/C
Posted: December 17th, 2009, 7:11 am
by oh joy
yeah...i saw that but i didn't think it was reliable enough...
and it says that diatoms are a group. Im not sure what they mean by that...
Re: Fossils B/C
Posted: December 17th, 2009, 8:03 am
by E Edgar
Wikipedia tends to be pretty reliable.
You should really use a variety of sources to find information but if you only have time to check one, wikipedia is definitely OK.
Re: Fossils B/C
Posted: December 17th, 2009, 9:39 am
by Flavorflav
oh joy wrote:
yeah...i saw that but i didn't think it was reliable enough...
and it says that diatoms are a group. Im not sure what they mean by that...
It says a bit more than that:
Classification
The classification of heterokonts is still unsettled, and they may be treated as a division (or phylum), kingdom, or something in-between. Accordingly, groups like the diatoms may be ranked anywhere from class (usually called Diatomophyceae) to division (usually called Bacillariophyta), with corresponding changes in the ranks of their subgroups.
Diatoms are traditionally divided into two orders:
* centric diatoms (Centrales), which are radially symmetric
* pennate diatoms (Pennales), which are bilaterally symmetric. The former are paraphyletic to the latter.
A more recent classification[2] divides the diatoms into three classes:
* centric diatoms (Coscinodiscophyceae)
* pennate diatoms
o without a raphe (Fragilariophyceae)
o with a raphe (Bacillariophyceae)
It is probable there will be further revisions as understanding of their relationships increases.[7]
http://en.wikipedia.org/wiki/Diatom#Classification
Re: Fossils B/C
Posted: December 17th, 2009, 1:01 pm
by oh joy
thanks!
um...sorry
but...graptolite?
Re: Fossils B/C
Posted: December 17th, 2009, 1:05 pm
by oh joy
oh wait...i think they have many orders...so it's ok, i think. yay!