[Taxacom] Type localities (was: Bionomina 13 published)
Thomas Pape
tpape at snm.ku.dk
Sat Dec 29 16:18:18 CST 2018
The "type locality" is the locality data provided for the name-bearing specimen. No more and no less.
The type locality is prone to error and inaccuracy as any other piece of information, but it *may* be of help when a type is not fit for identification. In particular when there is only one candidate species present at the type locality. An association between name and species based only on the type locality will remain hypothetical, but the hypothesis will be corroborated (or not) as new data emerge. If nomenclatural instability remains, it is possible to submit a Case for the Commission to set aside the unidentifiable name-bearing type and designate one better suited for nomenclatural stability.
/Thomas Pape
-----Original Message-----
From: Taxacom <taxacom-bounces at mailman.nhm.ku.edu> On Behalf Of Stephen Thorpe
Sent: 29. december 2018 22:11
To: taxacom at mailman.nhm.ku.edu; Elena Kupriyanova <Elena.Kupriyanova at austmus.gov.au>
Subject: Re: [Taxacom] Type localities (was: Bionomina 13 published)
Lena,
Yes, I do have a better suggestion! If a taxonomist is ever faced with a situation in which they can only use type locality information to associate a name with a species, then they should simply refrain from doing so and declare the name to be a nomen dubium. The name can then be safely ignored, rather than risk using it for the wrong species.
Stephen
--------------------------------------------
On Sun, 30/12/18, Elena Kupriyanova <Elena.Kupriyanova at austmus.gov.au> wrote:
Subject: RE: [Taxacom] Type localities (was: Bionomina 13 published)
To: "Stephen Thorpe" <stephen_thorpe at yahoo.co.nz>, "taxacom at mailman.nhm.ku.edu" <taxacom at mailman.nhm.ku.edu>
Received: Sunday, 30 December, 2018, 9:53 AM
Stephen,
I
totally agree, such a scenario does create a problem. Do you have a better suggestion how to deal with problem?
Lena
Dr. Elena Kupriyanova
Senior
Research Scientist
Marine Invertebrates
Associate Editor,
Records of the Australian Museum
Australian Museum Research
Institute
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Australia
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-----Original Message-----
From: Stephen Thorpe [mailto:stephen_thorpe at yahoo.co.nz]
Sent: Sunday, 30 December 2018 7:16 AM
To: taxacom at mailman.nhm.ku.edu;
Elena Kupriyanova <Elena.Kupriyanova at austmus.gov.au>
Subject: RE: [Taxacom] Type localities (was:
Bionomina 13 published)
You
seem to have skirted around the main problem I suggested, which was 2 or more candidate species in sympatry at the type locality. It is a very real possibility. If you associated a name with a species, based on the type locality, then you assume that the stated type locality is correct and that there is one and only one candidate species present at the type locality! For a real example, a recent revision of the genus Sagola is interesting in that only males can be identified morphologically, but many old types are females. Nevertheless, the authors (Park & Carlton) somehow managed to associate every unique female holotype with a species, based on stated type localities, despite the fact that distributions are very imperfectly known, sympatry is common in the genus, and so many species are known from so few specimens that further new species are very likely (in sympatry with known species). Hence, effectively all the authors did was to make decisions as to which names referred to which species, taking type localities into account, but they might as well have just considered those old (female
based) names to be nomina dubia. The level of uncertainty associated with their approach is such that some of the old female based species might not even occur in their assigned type localities, and there is probably in many cases no way to confirm or refute that anyway (it could lead, for example, to a scenario in which the type locality, after more collecting, turns out to be an outlier in the distribution of the species, but then someone will probably suggest range contraction due to climate change!)
Stephen
--------------------------------------------
On Sun, 30/12/18, Elena Kupriyanova <Elena.Kupriyanova at austmus.gov.au>
wrote:
Subject: RE:
[Taxacom] Type localities (was: Bionomina 13 published)
To: "Stephen Thorpe" <stephen_thorpe at yahoo.co.nz>, "taxacom at mailman.nhm.ku.edu"
<taxacom at mailman.nhm.ku.edu>
Received: Sunday, 30 December, 2018, 12:07 AM
Dr. Elena Kupriyanova
Senior Research Scientist
Marine Invertebrates
Associate Editor,
Records of
the Australian Museum
Australian Museum Research Institute
1 William Street Sydney NSW 2010 Australia t
61 2 9320 6340 m 61402735679 f 61 2
9320 6059
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Inspiring the exploration of nature and cultures
-----Original Message-----
From: Stephen Thorpe [mailto:stephen_thorpe at yahoo.co.nz]
Sent: Friday, 28 December 2018 3:07 PM
To: taxacom at mailman.nhm.ku.edu;
Elena Kupriyanova <Elena.Kupriyanova at austmus.gov.au>
Subject: RE: [Taxacom] Type localities
(was:
Bionomina 13 published)
"to find what the name
bearing species
actually is one needs to
know the type locality"
>I disagree! One simply
needs some way to associate the name with one and only one species in the complex. Very often, type localities are too vague to be much use, might be completely wrong, or there might be more than one species of the complex in the stated type locality (especially if it is a vague/imprecise type locality).
Yes, and what is
the above
mentioned "some way" please?
> I expect you are
imagining a scenario in which, say, some previously recognised species is now considered to be a complex of ALLOPATRIC cryptic species
Not necessarily. I think I clearly stated the scenario I
am not imagining, but am familiar with too well - a huge
species complex under a name of a species that is assumed
to be cosmopolitan for a no good reason other than it is
assumed to be cosmopolitan
>and you want to know which of those cryptic species
the original name belongs to.
Yes, don't we all?
>The type locality MIGHT be a guide (if
it is correct, and if it is precise enough), but it might
not be of any use.
It is
the
best guide we have, but it MIGHT in
some cases be incorrect or not precise enough indeed
>If it isn't of any
use, then other
means must be sought to
associate the name with a species, and there are several
options.
Ok, continue
please, I really want to know about those options
> In
theory, if you could sequence the holotype, then DNA
matching might do the trick.
In theory? Have you tried this approach?
Yes, if it exists and if it was not fixed in formalin as
most marine inverts used to be fixed, this the best
way.
>At any rate,
type
localities are not of any major
importance: they may be helpful, but they may not.
That's all I'm saying (in the context of people
like Alain Dubious giving them far too much attention,
IMHO)
I
cannot see where this (surely unexpected :) conclusion
comes from. If the holotype does not exist, you collect
fresh material as close as possible to the TYPE
LOCALITY, designate a neotype, describe and sequence it.
If the holotype exists, but cannot be sequenced, you
collect fresh material as close as possible to the TYPE
LOCALITY, re-descibe the species based on the type and the
fresh material and sequence the fresh topotypical
material. If the type locality is not precise enough, you
make an educated guess and see above. If you discover
several cryptic sympatric species the type locality, you
take your pick which one you consider as the name bearing
species for the complex. In all cases type locality is of
paramount importance. I am now looking forward to hearing
about other several options mentioned above
Best,
Lena
--------------------------------------------
On Fri, 28/12/18, Elena Kupriyanova <Elena.Kupriyanova at austmus.gov.au>
wrote:
Subject: RE:
[Taxacom] Type localities
(was: Bionomina 13 published)
To:
"Stephen Thorpe" <stephen_thorpe at yahoo.co.nz>,
"taxacom at mailman.nhm.ku.edu"
<taxacom at mailman.nhm.ku.edu>
Received: Friday, 28 December, 2018, 4:22
PM
Yes, of course,
ultimately you
need to know
the
distributions of the species in the
complex. But to figure that out one has to start with
the distribution of the name bearing species of the
complex and to find what the name bearing species
actually is one needs to know the type locality
Dr. Elena
Kupriyanova
Senior
Research Scientist
Marine
Invertebrates
Associate
Editor,
Records of
the
Australian
Museum
Australian Museum
Research
Institute
1 William Street Sydney
NSW 2010 Australia t 61 2 9320 6340 m
61402735679 f
61 2
9320 6059
Visit: https://apac01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.australianmuseum.net.au&data=02%7C01%7CElena.Kupriyanova%40austmus.gov.au%7C35d9ab42e3194872841008d66dca6516%7C6ee75868f5d64c8cb4cda3ddce30cfd6%7C0%7C0%7C636817113393360695&sdata=V9KcnWtQwtd92OmR719yPtcPJrG23tHT%2BuOPC0okyU8%3D&reserved=0
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Inspiring the exploration of nature and
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-----Original
Message-----
From: Stephen Thorpe
[mailto:stephen_thorpe at yahoo.co.nz]
Sent: Friday, 28 December 2018 1:21 PM
To: taxacom at mailman.nhm.ku.edu;
Elena Kupriyanova <Elena.Kupriyanova at austmus.gov.au>
Subject: Re: [Taxacom] Type localities
(was:
Bionomina 13
published)
Not
quite!
The type localities
per se still aren't important in the situation you
describe. What matters is the distributions of the
segregate species in the complex.
Stephen
--------------------------------------------
On Fri, 28/12/18, Elena Kupriyanova <Elena.Kupriyanova at austmus.gov.au>
wrote:
Subject: Re:
[Taxacom] Type
localities
(was: Bionomina 13 published)
To:
"taxacom at mailman.nhm.ku.edu"
<taxacom at mailman.nhm.ku.edu>
Received: Friday, 28 December, 2018, 3:15
PM
> to answer
your
question, I
wouldn't
think type
localities would
be of much
importance at all for a common, widespread uniform
species.
Oh,
really? Except for the most common
situation in shallow-water
marine
invertebrates. Once
one actually bothers to look more or less carefully at
this "common, widespread uniform species" and
discovers a huge species complex beyond the façade of
this "common" or even "cosmopolitan
species", the importance of the type localities
somehow becomes crystal clear.
Dr.
Elena
Kupriyanova
Senior
Research Scientist
Marine
Invertebrates
Associate
Editor,
Records of
the
Australian Museum
Australian Museum Research
Institute
1
William
Street Sydney NSW
2010
Australia
t 61 2
9320
6340 m
61402735679 f 61 2 9320 6059
Visit:
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Nurturing Nuance while Assaulting Ambiguity for 31 Some Years, 1987-2018.
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