regarding the associated query,  I think this species may only occur
in  water with some amount of salt and tidal influence, at least
that's the case of the Hudson River population I know around here.
The saline component  wouldn't be present in the Great Lakes. So that
may explain why it doesn't appear to have been reported thusfar from
the Great Lakes (?)

On 1/6/23, [log in to unmask]
<[log in to unmask]> wrote:
> Hi Dale for Fred,
>
>
>
> Send snail mail details and I'll send samples of those I reported from the
> Indian River Lagoon.  If you want more than 2-3, it’ll have to wait until
> I’m in the field again.
>
>
>
> [log in to unmask] <mailto:[log in to unmask]>
>
>
>
> -----Original Message-----
> From: Conchologists List <[log in to unmask]> On Behalf Of Frederick
> W. Schueler
> Sent: Friday, January 6, 2023 3:11 PM
> To: [log in to unmask]
> Subject: Re: [CONCH-L] A new year, a new presentation
>
>
>
> On 06-Jan-23 10:06 a.m., Dale Snyder wrote:
>
>
>
> Mytilopsis leucophaeata
> <https://olram9.wixsite.com/letstalkseashells/copy-of-template-576>
>
>
>
>> Hmm, I wouldn't be surprised if these haven't joined the Quagga and Zebra
>> mussels in the Great Lakes. Ship ballast brought those other two to Lake
>> Erie (the only one of the Great Lakes I've visited), and I found a few
>> mussels that resemble this among the thousands of the others that I
>> shoveled up and brought home
>
>
>
> * thank you for this - I was totally unaware of this range expansion.
>
> Todd Morris points out that "Mytilopsis was considered as part of the
>
> 2012 Canadian Dreissenid risk assessment undertaken by DFO (
> <https://waves-vagues.dfo-mpo.gc.ca/library-bibliotheque/348700.pdf>
> https://waves-vagues.dfo-mpo.gc.ca/library-bibliotheque/348700.pdf).
>
> The risk assessment focused on fresh waters and it was determined that the
> risk of invasion was low given the salinity requirements of Mytilopsis. It
> is unlikely that this species would be in the Great Lakes however the risk
> to estuarine habitats was not considered as part of the
>
> 2012 risk assessment."
>
>
>
> I wonder if someone could send me a small bagfull of Mytilopsis shells so I
> can calibrate myself to recognize them in the Great Lakes or along the St
> Lawrence or Bay of Fundy this summer? I could send some eastern Ontario
> Unionids, or Chinese Mystery Snails, or a copy of our book about Lake
> Ontario or Terrestrial Gastropods in return.
>
>
>
> fred schueler
>
> Research Curator
>
>
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