Message 2002-01-0015: Re: remaining jobs... (Trivial)

Thu, 24 Jan 2002 16:19:28 +0100

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Date: Thu, 24 Jan 2002 16:19:28 +0100
From: David Marjanovic <>
To: PhyloCode mailing list <>
Subject: Re: remaining jobs... (Trivial)

> Even if it fails, there EXIST
> quite 'no-doubt' other fusion organisms, e.g., lichens. It turns out that
> phylogenetic tree is not a strict tree, but a loosely connected digraph
> (although almost tree-like, it has loops).
> PhyloCode should reflect that. What is the opinion of other readers of the
> list?
> Fusion organisms should fall inside both parent clades.

Or we are picky and say "hmm, the fungus of a lichen is a fungus, the "alga"
is a chlorophyte, cyanobacterium, whatever, the mitochondria of both are
alpha-proteobacteria, the chloroplasts are cyanobacteria, and maybe the
cilia and centrosomes are spirochaetes." Of course I think it would be
nonsense to name clades of mitochondria, chloroplasts or suchlike, as their
topologies must be the same as those of their hosts.

BTW, maybe it should not be compulsory to refer every organism that can be
put into a clade to a species. Especially among fossils it is usually
impossible to determine what species are (because only the morphospecies
concept is applicable).


Feedback to <> is welcome!