Hi Emilio and John,
The Mississippi delta is a natural biological barrier, almost impossible to cross for species at direct development and living in relatively clean waters such Volutidae. If a Texas population exists, the genetic exchange with the Florida/Alabama populations must be rare, and the genetic drift between them shall lead (in theory of course!) to obvious differences…That's why I open the question.
In fact, it seems that we have two populations only: the Florida/Alabama and the Yucatan, each populations having their own variants.
Genus Scaphella is a true puzzle and the researcher needs aspirin to continue..
Patrice Bail
2 square La Fontaine 75016 Paris
Tel:+33(1)45253330
Mob:+33(6)32692180
> Le 11 nov. 2015 à 01:12, Emilio F Garcia <[log in to unmask]> a écrit :
>
> Hi John,
>
> Good to hear from you. I am sure that the S. junonia from Mexico come from Yucatán, a well-known locality.
>
> I think that Pat Bail wants reliable data on Scaphella junonia from Texas. Although Encyclopedia of Texas Seashells has it listed, the data is not-at-all reliable. I am one of the authors for the huge Texas A & M publication on the Gulf of Mexico biota of which you speak; however, we did not include Texas in the geographic distribution of S. junonia because we are yet to find reliable data.
>
> Cordially,
>
> Emilio
>
> ----- Original Message -----
> From: [log in to unmask]
> To: [log in to unmask]
> Sent: Tuesday, November 10, 2015 4:53:49 PM
> Subject: Re: [CONCH-L] Scaphella juniona
>
> Dear Emilio,
>
> The shell auction site shellauction.net had three S. junonia from
> Mexico offered for sale in the last auction. Maybe Pat would like to
> look there for data? I cannot vouch for the accuracy.
>
> John
>
> ----- Original Message -----
> From: "Conchologists List" <[log in to unmask]>
> To:<[log in to unmask]>
> Cc:
> Sent:Tue, 10 Nov 2015 12:38:07 -0600
> Subject:Re: [CONCH-L] Scaphella juniona
>
> Hi Pat,
>
> I have never collected Scaphella junonia in Texas. The farthest west
> was one specimen at 28º00.86'N, 92º27,56"W, which is still
> Louisiana. It has a very interesting orange coloration (i.e., S. j.
> form johnstoneae to the max) but it was collected dead. I will be glad
> to send you an image if you think it will be of interest.
>
> Emilio
>
> ----- Original Message -----
> From: "Patrice BAIL" <[log in to unmask]>
> To: [log in to unmask]
> Sent: Tuesday, November 10, 2015 10:34:02 AM
> Subject: [CONCH-L] Scaphella juniona
>
> Hi Volutist fellows,
> Are they reliable records of Scaphella juniona living in the Texas
> and east Louisiana waters?
> In the other way, does it cross through the Mississipi delta ?
> Thanks. If this eastern population exists, photos of specimens will
> be highly appreciated.
> Patrice Bail
> 2 square La Fontaine 75016 Paris
> Tel:+33(1)45253330
> Mob:+33(6)32692180
>
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