You have heard all I know thus far.

To that I reiterate the cited Jean Andrews
observation and the time-worn caveat: "Don't
believe everything you read in books."

Harry


At 12:10 PM 10/9/2009, you wrote:
>Harry et al,
>
>Regarding I. recurvum, I would be interested in hearing more about
>those northern records, ie Cape Cod or thereabouts.
>
>It has never been found in New York to my knowledge,  at least not
>recently, so I am curious if anybody knows what the actual northern
>records are.
>
>On 10/9/09, Harry G. Lee <[log in to unmask]> wrote:
> > Team,
> >
> > Maybe it would be salutary to pool our resources
> > and assemble ranges for each of the three mussels in the recent discussion:
> >
> > Geukensia demissa (Dillwyn, 1817): Gulf of St.
> > Lawrence, Canada (Abbott, 1974: 437) - the
> > northeasternmost part thereof [39º; Rosenberg,
> > 2009] to Lake Worth Lagoon, Palm Beach Co., FL (Marshall, 2009).
> >
> > Geukensia granosissima (G.B. Sowerby III, 1914):
> > FL Keys (Mikkelsen and Bieler, 2008: 84-85) to
> > Yucatan, S.E. Mexico (Andrews, 1971: 156, but not
> > Vokes and Vokes, 1984). In my allotted hour, I
> > could find no records S. of TX except for
> > "Caribbean Central America, South America
> > (Venezuela)" (Mikkelsen and Bieler, 2008: 84-85).
> >
> > Ischadium recurvum (Rafinesque, 1820): Cape Cod
> > (Abbott, 1974: 430, but not Gould, 1870) to
> > somewhat north of the city of Campeche, S.E.
> > Mexico (Vokes and Vokes, 1984: viii; 36; pl. 34,
> > fig. 3), including the FL Keys (Mikkelsen and
> > Bieler, 2008: 84-85). Puerto Rico (Warmke and
> > Abbott, 1961: 162). Caribbean Central America
> > (Mikkelsen and Bieler, 2008: 84-85; I cannot confirm).
> >
> > The above discordances in the limits of range for
> > all these estuarine species may due at least in
> > part to climatic conditions like drought (Andrews, 1971: 157). Comments??
> >
> > Abbott, R.T., 1974. American Seashells (Second
> > Edition). Van Nostrand Rheinhold Co., New York.
> > Pp. 1-663, 24 pl., numerous text figs.
> > Andrews, J., 1971.  Sea shells of the Texas
> > coast. Univ. Texas, Austin, xvii + pp. 3-298 incl. numerous text figs.
> > Gould, A. A. [W. G. Binney, ed.], 1870. Report on
> > the Invertebrata of Massachusetts second edition,
> > comprising the Mollusca. Wright and Potter,
> > Boston. vii + 1-524 + pls. XVI to XXVII with    facing plate explanations.
> > Marshall, C., 2009. Personal communication [Conch-L], 6 Oct..
> > Mikkelsen, P. M. and R. Bieler. 2008. Seashells
> > of Southern Florida. Living marine mollusks of
> > the Florida keys and adjacent regions. Bivalves.
> > Princeton University Press, Princeton, NJ.      Pp. 1-503.
> > Rosenberg, G., 2009. Malacolog 4.1.1: A Database
> > of Western Atlantic Marine Mollusca. [WWW
> > database (version 4.1.1)] URL http://www.malacolog.org/.
> > Vokes, H.E. and E.H. Vokes, 1984 [“1983”].
> > Distribution of shallow-water marine Mollusca,
> > Yucatan Peninsula, Mexico. Mesoamerican
> > Ecological Institute, Monograph 1, Middle
> > American    Research Institute, Publication
> 54: i-viii + 1-183 incl. 50 pls.
> > Warmke G.L. and R.T. Abbott, 1961. Caribbean
> > Seashells. Livingstone Publishing Co., Narberth,
> > PA, xx + pp. 1-348, incl. 44 pls.
> >
> > Harry

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