Probably, but not necessarily all syntypes are the MCZ No xxxyyy & xxxyyy.
There is a possibility that some of the syntypes were donated to another
museum (or swapped) in the past. A lectotype selection -if not done in the
meantime- would be suitable for stability of nomenclature, and in my
opinion one of the MCZ specimens would be most suitable, as it is mentioned
in Clench's catalogue.

Gijs

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> Van: Kevin Lamprell <[log in to unmask]>
> Aan: [log in to unmask]
> Onderwerp: Re: More question on syntypes or cotypes
> Datum: zondag 4 juli 1999 7:05
>
> In a recent publication (A Revision of the Scaphopoda from Australian
> Waters) we encountered numerous old co-types lodged in an Australian
> museum for various species which had been named and lodged in this
> museum. We treated these lots as syntype lots and from them selected a
> lectotype the others in the same lot becoming paralectotypes.
>
> Achatina blainiana Poey 1851, cotypes MCZ No xxxyyy & xxxyyy would
> probably then be syntypes and if a lectotype has not been selected then
> it remains for some worker to do so.
>
> Kev