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Conchologists of America List <[log in to unmask]>
Subject:
R: terminology
From:
"Maurizio A. PERINI" <[log in to unmask]>
Date:
Tue, 23 May 2000 20:39:44 +0200
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Conchologists of America List <[log in to unmask]>
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Tuesday   May 23, 2000   08:38 PM

Dear Linda

Monophyly: the derivation of a taxon through one or more 
lineages from one immediately ancestral taxon of the same
or lower rank.

Polyphyletic: a term applied to a composite taxon derived from
two or more ancestral sources; not of a single immediate
line of descent.

from: "Principles of Systematic Zoology", E.Mayr.

Maurizio.

-----Messaggio originale-----
Da:     Linda Bush [SMTP:[log in to unmask]]
Inviato:        marted́ 23 maggio 2000 19.21
A:      [log in to unmask]
Oggetto:        terminology

To Dave and others-
         Will you please explain the terms "monophyletic,"  "polyphyletic," and so forth.  I am supposing that they refer to the ancestry of a genus or other level taxon.
                        Thanks,
                                Linda Bush

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