[Taxacom] Paraphyletic species and paraphyletic higher taxa

Rob Smissen SmissenR at landcareresearch.co.nz
Tue Dec 14 02:31:05 CST 2010

Greetings taxacomers

In response to Richard Zander, Curtis Clark wrote:

An evolutionary cladist would say "Species are the smallest units of
phylogeny, and anybody who thinks paraphyletic species justify
paraphyletic higher taxa is a dogmatist."
I'm not sure if Curtis is an evolutionary cladist or not, but if so he and Willi Hennig are both wrong - sometimes the smallest units of phylogeny are higher taxa than species. The extent of tokogeny is considerable... at least among the daisies (the largest family of flowering plants, don't believe a word they say about orchids). Taxa with hybrid origins may not in themselves be a problem, but if their ancestors don't go extinct they leave one hell of a mess.


Please consider the environment before printing this email
Warning: This electronic message together with any attachments is confidential. If you receive it in error: (i) you must not read, use, disclose, copy or retain it; (ii) please contact the sender immediately by reply email and then delete the emails.
The views expressed in this email may not be those of Landcare Research New Zealand Limited. http://www.landcareresearch.co.nz

More information about the Taxacom mailing list