[Taxacom] describing species based on DNA sequences alone

Elena Kupriyanova Elena.Kupriyanova at austmus.gov.au
Sun Jan 15 21:09:18 CST 2017


Hi Scott,

I would be interested in reading the first of those papers you listed if I could get a pdf please.
I just sent these two papers to Mark and to the list, plus all my publications are available on Researchgate

Personally I am against the naming of species without a morphological analysis including a differential diagnosis, preferably one that actually works.
Sorry, I have to repeat myself – naming species without a morphological analysis IS NOT THE SAME as actually performing such an analysis and NOT FINDING any useful features that can be included in an actually working differential diagnosis.
I will concede that the fact I work with fossils as well as living taxa probably biases me somewhat as a morphological analysis is the only thing that permits me to include the fossils in the phylogeny, and I do not consider phylogenies particularly useful, or accurate, without the fossils.
Unfortunately some animals just do not have decent fossil record
I do not think it should be done and although I know of plenty of cases where cryptic species were initially identified using molecular evidence including some I later described, once the morphology was done including detailed internal morphology that these so called cryptics were actually not so cryptic.
Exactly what I said before – if it takes a dedicated study that can be performed only by specialist working on the group to reveal very obscure morphological differences, such differences cannot provide a differential diagnosis that actually works. In this case, why not use a working molecular differential diagnosis?

Cheers,
Lena
Cheers, Scott

On Sun, Jan 15, 2017 at 5:35 PM, Elena Kupriyanova <Elena.Kupriyanova at austmus.gov.au<mailto:Elena.Kupriyanova at austmus.gov.au>> wrote:
Hi Karla and everyone,


I think there is some confusing between describing species based on DNA sequences alone and diagnosing newly decsribed species using DNA sequences alone. Two examples of our own papers are given below. We dutifully describe new species, but accept that the only realistic way to tell them apart is to look at  particular fragments of DNA.


Halt, M. N. Kupriyanova, E. K., Cooper, S. J. B. & Rouse G.W. 2009. Naming species with no morphological indicators: species status of Galeolaria caespitosa (Annelida, Serpulidae) inferred from nuclear and mitochondrial gene sequences and morphology. Invertebrate Systematics 23: 205-222.


Sun, Y., Wong, E, Tovar-Hernandez, M., Williamson, J. & Kupriyanova, E.K. 2016. Is Hydroides brachyacantha (Serpulidae, Annelida) a widely-distributed species? Invertebrate Systematics 30, 41-59.


Hope it helps





________________________________
From: Taxacom <taxacom-bounces at mailman.nhm.ku.edu<mailto:taxacom-bounces at mailman.nhm.ku.edu>> on behalf of Karla Shikev <karlashikev at gmail.com<mailto:karlashikev at gmail.com>>
Sent: Sunday, 15 January 2017 11:10 PM
To: taxacom at mailman.nhm.ku.edu<mailto:taxacom at mailman.nhm.ku.edu>
Subject: [Taxacom] describing species based on DNA sequences alone

Dear colleagues,

I'm looking for instances of animal species that have been described based
on DNA sequences alone.

I'd also be very interested in your opinion about this issue.

Sincerely,

Karla
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