Hi Olivier,
I agree with you but cannot understand what is it, for example, Conus
textile f. neovicarius?
C. textile neovicarius da Motta, 1982 is described as a subspecies from the
Red Sea. According to the ICZN:104 forms are "Those individuals of a
species or subspecies differing, in a stated way, from other individuals
within the taxon (e.g. larval and adult forms, male and female forms,
ecological forms, and seasonal forms)."
Forms are individuals, not populations as a whole, which can be diagnosed by
statistical shell characteristics. There is no such a form Luria pulchra f.
sinaiensis but there is a subspecies Luria pulchra sinaiensis. It is
interesting to know arguments in the support of the opposite opinion.
Ed
----- Original Message -----
From: "Olivier Caro" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, February 07, 2006 1:52 PM
Subject: Re: Cyp tigris schilderiana vs tigris
> Form instead of subspecies ? Huurgh ! I suppose it's incorrect...
> For me, a form is an extreme variation of one feature, inside a
> population.
> For example, some species of Pectinidae have the brown as average colour,
> but they can also tend to a more reddish colour, or a light pale one.
> A whole red specimen will receive the name "Genus species f. rubra", an
> extreme pale one will receive something like "Genus species f. albicans".
> But, I believe, these are forms and only forms because you can find,
> within
> the same population, all the range from the pure white to the brick red,
> via
> the usual chestnut colour. Right ? Regarding hybrids, I never succeed when
> I
> try to think something. Are we sure they do exist in molluscan fauna ?
> If so, I stop sorting my shells !
>
> Olivier Caro
>
>
>
>
> ----- Original Message -----
> From: "E. Heiman" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, February 07, 2006 11:40 AM
> Subject: Re: Cyp tigris schilderiana vs tigris
>
>
>> Shalom Chris
>> do you mean an article in # 33(1), 2005? I am personally acquainted with
>> the
>> author.
>>
>> People sometimes forget that subspecies, talking about living molluscs,
>> are
>> geographically separated populations, which differ from other populations
>> of
>> the same species by statistical shell characteristics. So if one finds an
>> unusually large shell of C. tigris in Kenya this shell, in my opinion,
>> should be treated as a huge tigris shell and not as C. tigris
>> schilderiana.
>> One can find in the literature curious things when geographical
>> separation
>> is not considered: Cyp. pantherina catulus or hybrid pantherina x tigris
>> from Hurghada, northern Red Sea (the former is a subspecies described
>> from
>> the Gulf of Aden, the only area where tigris and pantherina may meet).
>> There
>> are many other examples.
>> Sometimes a term 'form' is used instead of a term 'subspecies'. Is this
>> correct?
>> Sincerely
>> Ed
>>
>>
>> ----- Original Message -----
>> From: "Chris Takahashi" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Tuesday, February 07, 2006 9:36 AM
>> Subject: Cyp tigris schilderiana vs tigris
>>
>>
>>> Aloha Ed,
>>> In the case of Cypraea tigris schilderiana Cate, 1961 vs Cypraea tigris
>>> Linnaeus, 1758 a very nice article appeared in a recent American
>>> Malacologist magazine addressing this confusion & offered some
>>> resolutions.
>>> CHRIS:)
>>>
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