Yeah, there are some sedimentary rocks on the Fossils listjlordhe wrote:Can Rocks and Minerals help
Fossils B/C
-
- Exalted Member
- Posts: 809
- Joined: Tue Apr 11, 2017 6:55 pm
- Division: C
- State: MO
- Pronouns: He/Him/His
- Has thanked: 2 times
- Been thanked: 7 times
Re: Fossils B/C
-
- Exalted Member
- Posts: 809
- Joined: Tue Apr 11, 2017 6:55 pm
- Division: C
- State: MO
- Pronouns: He/Him/His
- Has thanked: 2 times
- Been thanked: 7 times
Re: Fossils B/C
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?
-
- Moderator
- Posts: 4315
- Joined: Sun Jan 26, 2014 12:48 pm
- Division: Grad
- State: GA
- Has thanked: 217 times
- Been thanked: 75 times
Re: Fossils B/C
Generally you wouldn't really distinguish them, just note that you might be asked to identify any genus of ammonoid to the subclass level.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?
-
- Exalted Member
- Posts: 809
- Joined: Tue Apr 11, 2017 6:55 pm
- Division: C
- State: MO
- Pronouns: He/Him/His
- Has thanked: 2 times
- Been thanked: 7 times
Re: Fossils B/C
Then why is it on the list instead of as a category with specific genuses under it?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.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?
-
- Exalted Member
- Posts: 1597
- Joined: Sun Jan 18, 2015 7:42 am
- Division: C
- State: PA
- Has thanked: 6 times
- Been thanked: 15 times
Re: Fossils B/C
Probably just because it's numbered and to make it clear that you have to identify ammonoids to the subclass level.dxu46 wrote:Then why is it on the list instead of as a category with specific genuses under it?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.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?
-
- Moderator
- Posts: 4315
- Joined: Sun Jan 26, 2014 12:48 pm
- Division: Grad
- State: GA
- Has thanked: 217 times
- Been thanked: 75 times
Re: Fossils B/C
Exactly. According to the new rule on taxonomy, if it wasn't in the list you should not be asked to identify the taxon.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.dxu46 wrote:Then why is it on the list instead of as a category with specific genuses under it?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.
-
- Exalted Member
- Posts: 809
- Joined: Tue Apr 11, 2017 6:55 pm
- Division: C
- State: MO
- Pronouns: He/Him/His
- Has thanked: 2 times
- Been thanked: 7 times
Re: Fossils B/C
But then why is Ammonoidea an identifiable class and not, say, Gastropoda?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.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.dxu46 wrote: Then why is it on the list instead of as a category with specific genuses under it?
-
- Exalted Member
- Posts: 1597
- Joined: Sun Jan 18, 2015 7:42 am
- Division: C
- State: PA
- Has thanked: 6 times
- Been thanked: 15 times
Re: Fossils B/C
By the almighty wisdom of the rules councildxu46 wrote:But then why is Ammonoidea an identifiable class and not, say, Gastropoda?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.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.
-
- Moderator
- Posts: 4315
- Joined: Sun Jan 26, 2014 12:48 pm
- Division: Grad
- State: GA
- Has thanked: 217 times
- Been thanked: 75 times
Re: Fossils B/C
They are all identifiable classes. Reread 3.d.ii.UTF-8 U+6211 U+662F wrote:By the almighty wisdom of the rules councildxu46 wrote:But then why is Ammonoidea an identifiable class and not, say, Gastropoda?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.
-
- Exalted Member
- Posts: 1597
- Joined: Sun Jan 18, 2015 7:42 am
- Division: C
- State: PA
- Has thanked: 6 times
- Been thanked: 15 times
Re: Fossils B/C
I disagree. It just says "taxonomic classification". I assume that means classifying identifiable specimens according to the taxonomy on the list.Unome wrote:They are all identifiable classes. Reread 3.d.ii.UTF-8 U+6211 U+662F wrote:By the almighty wisdom of the rules councildxu46 wrote: But then why is Ammonoidea an identifiable class and not, say, Gastropoda?