Re: Apisto Groupings

["Bob Crosby" <rtcrosby@charter.net>]

Mike & Diane,

When attempting to go to http://user.mc.net~warewolf/apisto.html, one gets a
page error. Hopefully this is a transient problem.

Bob


----- Original Message -----
From: "Mike & Diane Wise" <apistowise@bewellnet.com>
To: <apisto@listbox.com>
Sent: Saturday, January 27, 2001 10:39 AM
Subject: Re: Apisto Groupings


> Edison,
>
> The reason we split the genus into groups and complexes is because we now
> recognize nearly 200 different forms of Apistogramma. Certainly, many will
be
> found to be geographic populations of other forms (species), but we won't
be sure
> which are which without a lot of lab and field study. With so many forms
out
> there, breaking the genus down into various more closely related
groups/complexes
> greatly simplifies identifying species/forms. Now if only the books put
showed
> their fish in a similar fashion, but that's another story.
>
> Let me expand on David Soares' abbreviated description with a little
history.  In
> 1965 Hermann Meinken originally grouped the dozen or so then known apisto
species
> by using eye diameter/snout length ratio and shape of the dorsal and
caudal fins.
> This was a totally artificial system, but since there were so few species
no one
> tried to improve on it for 15 years. In 1980 Kullander published his first
> monograph on Brazilian and Peruvian species. In it he suggested a better
means of
> grouping the species in the genus, then about 40 in number. He had 7
> species-groups. Koslowski was the first to subdivide groups into
> species-complexes in his 1985 book. Since then the number of
> species-groups/complexes has expanded along with the number of new
species/forms.
> Probably the most recent published revision is mine that can be read on
the
> Apistogramma Study Groups web page:
http://user.mc.net~warewolf/apisto.html. It
> lists 11 species-groups with 14 species-complexes. This article is several
years
> old now and more new species have increased the number of species-groups.
I now
> recognize 15 species-groups and 26 species-complexes.
>
> The regani-group is the most species-rich in the genus. I recognize 10
> species-complexes containing 83 different species/forms. Regani-group
species can
> be recognized by:
> 1. relatively deep (high backed), laterally compressed body;
> 2. do NOT show a lateral spot;
> 3. low to moderate, even to very slightly serrated, dorsal fin (males);
> 4. round caudal fin (males), sometimes truncate (squared off) with small
> extensions of the outer rays;
> 5. vertical flank bars often visible, especially when stressed;
> 6. casually monogamous to casually polygamous.
>
> Mike Wise
>
> "Edison C. Yap" wrote:
>
> > Is there anyone on the list knows which Apistos belong to the Regani
Group?
> >  Also what are the different groups of Apistos and what Apistos belong
to
> > those Group?  Why are Apistos need to be grouped?
> >
> > Thanks,
> >
> > Edison C. Yap
> > Philippines
> >
>
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