[Taxacom] Taxonomic treatment of cyanobacterial endosymbionts

Tony Rees tonyrees49 at gmail.com
Fri Jun 18 15:02:31 CDT 2021


OK, for now I have left both genera, and their respective families, as
nomina dubia in Cyanophyceae (Chlorococcales) as originally proposed, with
taxonomic notes regarding their endosymbiotic characteristic.

RE Cyanocyta, despite being listed as not validly published in  LPSN, it
looks OK to me:
https://rupress.org/jcb/article/19/3/551/16284/ULTRASTRUCTURAL-STUDIES-ON-THE-BLUE-GREEN-ALGAL
- and there is no comment on its non-valid status in ING (entry from 1996)
where it is listed as "[C]" (=current). So I have left it as nomen dubium
for now; others can comment further if they wish...

Cyanocyta: https://www.irmng.org/aphia.php?p=taxdetails&id=1382326
Skujapelta: https://www.irmng.org/aphia.php?p=taxdetails&id=1090627

Regards - Tony

Tony Rees, New South Wales, Australia
https://about.me/TonyRees
www.irmng.org


On Fri, 18 Jun 2021 at 08:21, Tony Rees <tonyrees49 at gmail.com> wrote:

> Thanks Ken... for IRMNG I am thinking there are 3 options:
>
> (1) List either or both (probably now not Cyanocyta though) as accepted
> names in Cyanophyceae, with their proposed families
>
> (2) List both genera and their containing families as unaccepted names in
> Cyanophyceae, do not synonymise
>
> (3) Synonynise (sensu lato) both names with those of their "host" cells in
> Glaucophyta, and move the names there.
>
> At present I am inclining towards option (2), but could be persuaded
> otherwise by any suitable argument...
>
> Regards - Tony
>
>
> On Fri, 18 Jun 2021 at 07:52, Kenneth Kinman via Taxacom <
> taxacom at mailman.nhm.ku.edu> wrote:
>
>> Hi Tony,
>>         Cyanocyta korschikoffiana was apparently not validly published.
>> And although Skujapelta nuda was validly published, I doubt that most
>> botanists today would consider it an independent organism.  They seem to be
>> very primitive chloroplasts called muroplasts, but apparently totally
>> dependent on their hosts.
>>                         -----------Ken Kinman
>> Cyanocyta was not validly published according to:
>> https://lpsn.dsmz.de/species/cyanocyta-korschikoffiana
>> Shujapelta was validly published:
>> https://lpsn.dsmz.de/species/skujapelta-nuda
>>
>>
>> ________________________________
>> From: Taxacom <taxacom-bounces at mailman.nhm.ku.edu> on behalf of Tony
>> Rees via Taxacom <taxacom at mailman.nhm.ku.edu>
>> Sent: Thursday, June 17, 2021 3:38 PM
>> To: taxacom at mailman.nhm.ku.edu <taxacom at mailman.nhm.ku.edu>
>> Subject: [Taxacom] Taxonomic treatment of cyanobacterial endosymbionts
>>
>> Hi all,
>>
>> The glaucophycean "algae" Glaucocystis nostochinearum and Cyanophora
>> paradoxa contain endosymbionts (cyanelles) resembling blue-green algae
>> (Cyanobacteria) that have been separately named in the past (by Hall and
>> Claus, 1963) as cyanobacteria in their own right, namely as Skujapelta
>> nuda
>> (fam. Skujapeltaceae, order Chroococcales) in Glaucocystis, and Cyanocyta
>> korschikoffiana (fam. Cyanocytaceae, order Chroococcales), respectively.
>>
>> In Index Nominum Genericorum, Skujapelta and Cyanocyta are retained in
>> Cyanobacteria, whereas in AlgaeBase (current version) Skujapelta is placed
>> in Glaucosphaerales (Rodophyta - not Glaucophyceae) but still in its own
>> family, while Cyanocyta is not mentioned.
>>
>> So here is a puzzle: should the names for the cyanelles, i.e.  Skujapelta
>> and  Cyanocyta, be treated as "accepted" names, in their own families,
>> within Cyanobacteria, or synonyms of their host names and placed in
>> Glaucophyceae? What would you do, if interested in treating these names in
>> a system of higher taxonomy?
>>
>> Comments welcome,
>>
>> Regards - Tony
>> Tony Rees, New South Wales, Australia
>> www.irmng.org<http://www.irmng.org>
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