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I did a numerical taxonomy and a numerical biostratigraphy of Middle Cambrian trilobites many years ago. I found the results ambiguous but helpful: that is, the trilobite taxonomy was more-or-less logical, and much better than the pre-existing classification, the the cophenetic coefficients were rather low and therefore the validity was questionable. Conversely, the biostratigraphy worked very well and I recommend numerical methods for such. I can cite the work: Schwimmer, D.R. 1975, Quantitative taxonomy and biostratigraphy of Middle Cambrian trilobites from Montana and Wyoming. Mathematical Geology, 7(2):149-166. > Received: from SpoolDir by CCMAIN (Mercury 1.21); 1 Jun 95 13:37:40 EST > Return-path: <paleonet-owner@nhm.ac.uk> > Received: from nhm.ac.uk by mercury.csg.peachnet.edu (Mercury 1.21); > 1 Jun 95 13:37:26 EST > Received: (from root@localhost) by nhm.ac.uk (8.6.9/8.6.9) id JAA26895 for paleonet-outgoing; Thu, 1 Jun 1995 09:35:48 +0100 > Received: from plearn.edu.pl (plearn.edu.pl [148.81.18.1]) by nhm.ac.uk (8.6.9/8.6.9) with SMTP id JAA26880 for <paleonet@NHM.AC.UK>; Thu, 1 Jun 1995 09:35:35 +0100 > Message-Id: <199506010835.JAA26880@nhm.ac.uk> > Received: from PLEARN.EDU.PL by plearn.edu.pl (IBM VM SMTP V2R1) > with BSMTP id 5065; Thu, 01 Jun 95 10:34:41 CET > Received: from PLEARN.BITNET (NJE origin RUDYSTA@PLEARN) by PLEARN.EDU.PL > (LMail V1.2a/1.8a) with BSMTP id 2672; Thu, 1 Jun 1995 10:34:41 +0200 > Date: Thu, 01 Jun 95 10:30:56 CET > From: Tomasz Slomczynski <RUDYSTA%PLEARN.BITNET@PLEARN.EDU.PL> > To: paleonet@nhm.ac.uk > Sender: owner-paleonet@nhm.ac.uk > Precedence: bulk > Reply-To: paleonet@nhm.ac.uk > X-PMFLAGS: 34603136 > > > > To all Paleoneters > > What you think about numerical taxonomy ? > It works or not ? What would you say about results ? > Is it good method ? Maybe mistake ? Do you use it? > > So, send your answer. > David Schwimmer Dep't of Chemistry & Geology Columbus College, Columbus GA 31907-5645 Schwimmer_David@Mercury.csg.Peachnet.edu --please note that the underline in the name field is mandatory, yes, its a nuisance :-(
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