[Taxacom] naming of dark taxa (botanical or zoological?)

[Kenneth Kinman]

Hi Richard,

       I like your question about the difference between dark mutations and dark taxa.  But whether the "cellar" is cladistic or not, there seems to be the risk of prematurely opening the floodgates of splitting of these taxa at lower taxonomic levels.  I wouldn't be in too much hurry to speed things up too much (numbers into formal names).  It could create a destabilizing mess.   And that is just a lower taxonomic levels.


        At the higher taxonomic levels, there is even the problem of which Code of Nomenclature should govern most of these taxa.  Mycologists have formalized the name Cryptomycota (or Rozellomycota), so I guess the presumption is that ordinal and familial taxa would have botanical names.

       However, Cavalier-Smith. 2013, has formally classified them as Class Rozellidea within Phylum Choanozoa, so I assume family taxa would then have zoological names.  See Table 7 for his classification here:


https://www.sciencedirect.com/science/article/pii/S0932473912000508#tbl0035




________________________________
From: Taxacom <taxacom-bounces at mailman.nhm.ku.edu> on behalf of Richard Zander <Richard.Zander at mobot.org>
Sent: Saturday, February 24, 2018 2:14 PM
To: taxacom at mailman.nhm.ku.edu
Subject: Re: [Taxacom] Names and naming of dark taxa

Dark taxa? How does one determine the difference between dark mutations and dark taxa? There is no innate taxon criterion in cladistics. Cluster analysis to determine how different sequences group? Is a group of similar sequences a taxon? Does a group of similar sequences imply an evolutionary process involved, maybe some evolutionary trajectory through time?

A dark taxon in a cladistic cellar at molecular night is hard to envision.


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Richard H. Zander
Missouri Botanical Garden – 4344 Shaw Blvd. – St. Louis – Missouri – 63110 – USA
richard.zander at mobot.org
Web sites: http://www.mobot.org/plantscience/bfna/bfnamenu.htm and http://www.mobot.org/plantscience/resbot/


-----Original Message-----
From: Taxacom [mailto:taxacom-bounces at mailman.nhm.ku.edu] On Behalf Of Henrik Nilsson
Sent: Saturday, February 24, 2018 11:43 AM
To: taxacom at mailman.nhm.ku.edu
Subject: [Taxacom] Names and naming of dark taxa

Here’s a recent commentary on names and naming of dark taxa:

https://mycokeys.pensoft.net/article/24376/
New light on names and naming of dark taxa<https://mycokeys.pensoft.net/article/24376/>
mycokeys.pensoft.net
A growing proportion of fungal species and lineages are known only from sequence data and cannot be linked to any physical specimen or resolved taxonomic name. Such fungi are often referred to as “dark taxa” or “dark matter fungi”. As they lack a taxonomic identity in the form of a name, they are regularly ignored in many important contexts, for example in legalisation and species counts. It is therefore very urgent to find a system to also deal with these fungi. Here, issues relating to the taxonomy and nomenclature of dark taxa are discussed and a number of questions that the mycological community needs to consider before deciding on what system/s to implement are highlighted.




Abstract:
A growing proportion of fungal species and lineages are known only from sequence data and cannot be linked to any physical specimen or resolved taxonomic name. Such fungi are often referred to as “dark taxa” or “dark matter fungi”. As they lack a taxonomic identity in the form of a name, they are regularly ignored in many important contexts, for example in legalisation and species counts. It is therefore very urgent to find a system to also deal with these fungi. Here, issues relating to the taxonomy and nomenclature of dark taxa are discussed and a number of questions that the mycological community needs to consider before deciding on what system/s to implement are highlighted.

Best wishes,

Henrik Nilsson
University of Gothenburg

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http://www2.dpes.gu.se/staff/hennil/
where did technology slow today? - Göteborgs universitet<http://www2.dpes.gu.se/staff/hennil/>
www2.dpes.gu.se
Name: R. Henrik Nilsson Position: Associate professor (docent) Address: University of Gothenburg, Department of Biological and Environmental Sciences, Box 461, 405 30 ...





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