Clasification,Cladification & Extiction

[kike@xxxxxxxxxxxxxxxxxxxxxxx (Enrique Bernardez Rodriguez)]

Concerning the debate on classification and extiction I think:
1.- Aves are dinosauria in exactly the same way mans are bacteria. Moreover
Aves have a long precedence in definition over dinosauria, thus, even in a
cladistic way, the correct asumption is to say tath some previously
considered dinosaurs are in reality aves.
2.- Paraphiletic groups arent real ok. Monophyletic, poliphyletic and
holophyletic (the correct spell for tath cladists call monophyletic) also
arent real. Only individuals and systems are real, sets, as taxa are, are
mental constructs. Clasifications (and cladifications) dont exists
independently from classifiers.
3.- Dinosauria arent extinct, ok, but trilobitomorpha, conodontophorida,
pteraspidomorpha etc  also arent stinct. Extinction is a biological
process. Biological (and physical and chemical) processes are state changes
in systems. Taxa (even species) are sets, not systems, and thus can not
experience any state change. Strictly speaking only populations (and
individuals in another sense) could become extinct. Thus cladistic analisis
or even any phylogenetic analisys havent any relevance to extinction
analisys.
                Sorry for the bad engish
                                E. Bernardez