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Topic: Taxonomy problem

Hi Chris

Not sure if this is one for you or not, but as you can see from this post http://forums.nbn.org.uk/viewtopic.php? … 73#p20773. There is an omission in the R6 version of the dictionary right at the top of the vascular plants list.

Currently in the R6 dictionary browser the top level classes of vascular plants appear as
Chlorophyta
Lycopodiophyta
Equisetophyta
Pteridophyta
Ginkophyta
Coniferophyta
Magnoliophyta

Mike tell us that Coniferophyta is now obsolete and that its child taxon Pinopsida now refers up to the overarching Trachyophyta (which is currently in the list of additional names) as should all the other classes above except Chlorophyta.

As it happens they all do, except Pteridophyta, so using Tracheophyta as the root for a query of our database currently excludes the ferns from the output result (in our database this is 11,000 records gone astray).

Rob Large
Wildlife Sites Officer
Wiltshire & Swindon Biological Records Centre

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Re: Taxonomy problem

Hi Rob

Mike gave me a nudge on this one a few days ago and I have started to look into it. It doesn't seem to be a clear cut case though (as always seems the case with higher-level plant taxonomy!) but I will see what we can do with it :)

Best wishes,
Chris R.

Chris Raper, Manager of the UK Species Inventory, Angela Marmont Centre for UK Biodiversity,
Natural History Museum, Cromwell Road, London, SW7 5BD.  (tel: 020 7942 5894)
also Tachinid Recording Scheme (http://tachinidae.org.uk/)

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Re: Taxonomy problem

Thanks Chris

Rob Large
Wildlife Sites Officer
Wiltshire & Swindon Biological Records Centre

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Re: Taxonomy problem

Hopefully this has now been fixed - at least it appears to have been on the UKSI browser on the NHM website.

I thought that I might just throw in my two-penny worth as higher-level taxonomy has, over the years, given me not a few headaches. The problem is that systematists have fun creating their own interpretations of higher groupings so, for a  given group, there may be alternate classifications in use (and the preferred one may depend on which country of continent that you work in!). Molecular studies can also lead to (sometimes quite drastic) revisions.

The approach that I adopted was to stick to a fairly conservative (traditional - even "old-fashioned") classification but declare this as a "management classification" which at least provided some stability, whilst not pretending to necessarily reflect the latest research.

At least we have improved on the original two-kingdom classification!

NBN Species Dictionary Project Manager (Retired!) smile

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Re: Taxonomy problem

Hi Charles - many thanks for the helpful comments. I have been following your lead and not rushing too quickly to change higher-level taxa without confirmation that the arrangement in question is fairly stable. ;)

Chris Raper, Manager of the UK Species Inventory, Angela Marmont Centre for UK Biodiversity,
Natural History Museum, Cromwell Road, London, SW7 5BD.  (tel: 020 7942 5894)
also Tachinid Recording Scheme (http://tachinidae.org.uk/)