Flag for Taxon: Subfamily Physinae
| Flagger | Content Author | Content | Reason | Flag Created | Resolved by | Resolution |
|---|---|---|---|---|---|---|
| thomaseverest | Subfamily Physinae |
New phylogeny updates from molecular work |
May. 21, 2023 00:14:46 +0000 | thomaseverest |
Taxon changes done |
Comments
Barcoding is minimally efficient for physids.
Dear Dr Lepitzki,
Re: "Pooled whole genome sequencing of the endangered Banff Springs Snail, Physella johnsoni, reveals genetic separation to P. gyrina and cryptic micro-geographical genetic structure"
We are delighted to let you know that the above submission, which you co-authored, has been accepted for publication in Conservation Genetics.
Please contact the corresponding author if you would like further details on this decision, including any reviewer feedback.
Thank you for choosing Conservation Genetics and we look forward to publishing your article.
Kind regards,
Editorial Assistant
Conservation Genetics
The following, from Young et al. 2021, also confirms our long-held conclusion of a post-glacial origin and along, with the in press Cons. Genetics paper, further warrants the retention of P. johnsoni as a valid species:
Specimens
identified as P. johnsoni from a spring complex in Alberta also had a diagnostic COI amino acid sequence, but
the nucleotide sequences suggested little divergence from P. gyrina overall (minimum pairwise difference, 0.5%).
This is consistent with recent colonization of this location following continental deglaciation41.
OK I've looked at that paper, and MB has already made the update. So here is what I think we should change:
*1. Reinstate Physella.
*2. Move P. acuta, P. columbiana, P. gyrina, P. johnsoni, P. latchfordi, P. natricina, P. pomilia, P. zonis to Physella.
*3. Move P. marmorata to Stenophysa.
*4. Swap P. ancillaria with P. gyrina.
*5. Split Physa into Physa and Physella, bumping IDs to subfamily where they overlap in North America.
I don't think anyone is actually going to see this comment, but I'll wait a little to see if anyone says anything.
Thanks Thomas,
I would suggest reinstating the species status of Physella wrighti given the inadequacy of barcoding to differentiate taxonomic details in Physidae with the repeated use of limited sequences in GenBank, as shown by the resolution of the issue with P. johnsoni and the current COSEWIC reassessment of the status of the Endangered (COSEWIC assessed and listed under the Canadian Species at Risk Act - search sararegistry.gc.ca) P. wrighti.
Dwayne Lepitzki, Ph.D.
Co-chair Molluscs SSC of COSEWIC
Member IUCN SSC Mollusca SSG
OK I've committed what I detailed above, and updated a few of my IDs where necessary. There may be some new unintended or removed disagreements.
Please let me know if there is similar literature to support P. wrighti. Otherwise we will still follow MolluscaBase per site policy (and would prefer they update first), and unless there are observations this would not be a high priority.
At long last, Young et al. (2021) have presented a preliminary molecular overview of the North American Physinae. Previously, we followed Wethington & Lydeard (2007), with a few adjustments because of community requests. Here are the changes I think we should adopt following the latest research and MolluscaBase:
*1. Reinstate Physella, transferring the following species to that genus: P. pomilia, P. gyrina, P. natricina, P. zionis, P. acuta.
*2. Move most remaining species to Physella as on MB, or leave them as in Wethington & Lydeard (2007).
*3. Swap P. ancillaria and P. johnsoni into P. gyrina.
*4. Split Physa into Physa and Physella, bumping IDs to subfamily where they overlap.
The third point in particular caused contention when we brought it up last time. The evidence still points to P. johnsoni not being a distinct species, but please let me know what you think of this.
@cedric_lee @lepitzkidaw @mws @bernhardhausdorf @susanhewitt @coreyjlange @quinnbirds @brucebennett @johndreynolds @colindjones
Other iNat links:
https://drive.google.com/file/d/1dA-Ean_4Vczv1BKSeprFiubNyIIvFxmg/view
https://www.inaturalist.org/taxon_changes/76342