Alfonso,
Your best bet is to get the original citation and check it yourself.
Failing that, cite them both, including the URL.  It is like citing a
personal communication which you cannot verify, but you give the name of
the source to allow others to decide if they trust that person's
judgement too.  You should also ask the editor of the publication for
which you are writing what their policy is for such a citation.  If you
gave too much information it can always be trimmed as needed.
Allen Aigen
[log in to unmask]

On Thu, 5 Jul 2001 20:31:51 -0400 Alfonso Pina
<[log in to unmask]> writes:
> Hello again,
>
> I will try to be more specific:
>
> I read in CLEMAM database (on-line) that the type species name
> (original
> description) for Simrothiella margaritacea (Koren & Danielsen, 1877)
> is
> Solenopus margaritaceus Koren & Danielssen, 1877 as stated by ICZN
> opinion
> 1185.
>
> When I cite this information, is the source CLEMAM or is ICZN
> opinion 1185?
> Hope my question is clearer now, best regards,
>
> Alfonso Pina
> Malaga
> Spain
>