The attitrion of taxonomic expertise

A. Contreras-Ramos atilano at IBIOLOGIA.UNAM.MX
Fri Oct 18 12:52:12 CDT 1996

>The "best fit" part is circular; the data that are used to choose the tree
>that provides the best fit are used to test homology (the data).

nature (raw data)   --->   proposed homologies (analysis)   --->
obtained (not chosen) tree(s) with hypothesized synapomorphies   --->
additional information (e.g., more characters), new assumptions, new
sources of characters (= testing of proposed phylogenetic relationships
and so of supporting synapomorphies)

where is the circularity?

Atilano Contreras-Ramos
Inst. Biologia, Depto. Zoologia; U.N.A.M.;
Apdo. Postal 70-153; 04510 Mexico, D.F.; MEXICO.
(525) 622-5705,06,12; exts. 286,287 (oficina)
(525) 550-0164 (fax); (525) 568-0213 (casa)
atilano at
species at

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