Hello,
depends how one sees this complex species:
as for me, the ones from the Mediterranean and the Canary Islands ones,
shallow, are very much the same. However, I dived already at 25 m deep
typical shells of the form cascabullorum: white base, smaller, more globose,
different spotting.
When one goes south to the Cape Verde Islands, the result of the findings is
very different: you get populations very much as the normal thing found in
the Mediterranean, but also populations from the sanctahelenae form, which
is close to the acicularis from the Caribbean. But in one batch, one will
find slender and triangular shaped shells, but all with a white base. Some
hard to distinguish from acicularis...
Guido
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> From: Alfonso Pina <[log in to unmask]>
> Reply-To: Conchologists of America List <[log in to unmask]>
> Date: Wed, 30 Jan 2002 11:05:27 +0100
> To: [log in to unmask]
> Subject: Re: (2-3) Erosaria spurca
>
> Hola Victoriano,
>
> Erosaria spurca extends its range from the Mediterranean Sea to Angola all
> along the West African coast, including Canaries and Cabo Verde Islands.
>
> According to Lorenz (2000), 'verdensium' (Melvill, 18888) must be considered
> an Atlantic form of E. spurca, because differences between them are not too
> constant. ('verdensium' presenting more dense spotting, thicker teeth and
> narrower aperture)
>
> 'cascabullorum' (Talavera et al., 1986) is regarded as a variety (i. e. less
> than a form) of E. spurca, more tiny and living deeper.
>
> Best regards,
>
> Alfonso
>
> ----- Original Message -----
> From: Victoriano Meneses Sores <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, January 29, 2002 8:24 PM
> Subject: (2-3) Erosaria spurca
>
>> Dear all I have three questions so I have written 3 emails to the
>> Conch_L users.
>>
>> The second question: I have Erosaria spurca from 3 Mediterranean places:
>>
>> -- Benisafuller, Menorca, Islas Baleares, Espaρa
>> -- Calahiguera, Almeria, Espaρa
>> -- San Roque, Cαdiz, Espaρa (!)
>>
>> and now I have received some specimens from Canary Is. how Erosaria spurca
>> cascabullorum, others like Erosaria spurca verdesium and others without
>> clasificated in a subespecies o in a form.
>>
>> I have visited many Urls and I have read all that I have about these
>> species but I still don΄t know what are the diferences between my
>> Mediterranean specimens and my Canarian specimens. I have consulted other
>> beginners and we are know more get involved. So the questions are:
>>
>> --Are valid the subspecies or we have to consider only forms?
>> --And what are the differences between Erosaria spurca spurca and the
>> others subspecies or forms?! :D
>>
>> Thanks to all in advance again.
>>
>>
>> Victoriano, Cαdiz, Espaρa (Spain)
>>
>> e-mail: [log in to unmask]
>> Url: www.eureka.ya.com/aaaron25
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