[Taxacom] species inquirenda or nomen dubium?

[Kenneth Kinman]

Hi Stephen,
      If the type specimen of Aus Bus lacks diagnostic characters, I
would call it a nomen dubium. 
     Species inquirenda, on the other hand, does not address a lack of
diagnostic characters, but whether the diagnostic characters it
possesses are sufficient to indicate separate species status.  At least
that is my understanding of the difference.   The diagnostic characters
could indicate a separate species, separate subspecies, or just some
other infraspecific variation (even oddball freaks).  
   ----My two cents worth,
                   Ken         
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Stephen wrote:
       yes, but I still do not have a clear understanding of the
difference between these two terms! 
what if a name, Aus bus, has a type specimen lacking diagnostic
characters (according to some author)? 
Should Aus bus be listed as a species inquirenda or as a nomen dubium? 
we refer to taxa by use of names, so I cannot keep the two issues apart
clearly 
________________________________ 
From: Barry Roth <barry_roth at yahoo.com> 
To: taxacom at mailman.nhm.ku.edu 
Sent: Sun, 12 June, 2011 12:26:40 PM 
Subject: Re: [Taxacom] species inquirenda or nomen dubium? 
The first has to do with the status of a taxon, the second pertains to
the status of a name. 
Barry Roth 
On Jun 11, 2011, at 4:59 PM, Stephen Thorpe <stephen_thorpe at
yahoo.co.nz> wrote: 
> I do not have a clear understanding of the difference >between these
two terms 
> ... can anyone explain?