Re: Hubers killidata

[Doug Karpa-Wilson <dkarpawi at indiana_edu>]

> Can anyone tell me if
> the text explains how and why the new classifications have been arrived
> at. I know it's based on new DNA techniques, but does killidata explain
> specifically, for example, the reasons why Cynolebias has been split
> into 4 genera, or does it just state that this is so?
> 	All the best,
> 			Guy.

Hey,

I don't know the specifics of Cynolebias, but usually genera get split
because they contain multiple separate groups which are not that closely
related to each other, or at least not more closely realted to each other
than they are to other genera.  There's a big move to make sure that each
genus consists of species descended from a single ancestor and all the
descendents of that ancestor(i.e. make them monophyletic).  IF there are
other genera that are also descended from the common ancestor of all the
old cynolebias, one is left with a choice of splitting up the genus into
monophyletic groups or sinking all the other genera descended from the
common ancestor into a huge genus. in many cases you end up with very
different things put together when you do that.  Thus, the splits.  Look
for more major movements as better phylogenies get published.

Doug


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References:

• Hubers killidata
• From: Guy Wren <killies at guyonet_free-online.co.uk>

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