caa a22 4500 465803067 CHVBK 20180323112057.0 cr unu---uuuuu 170327e19901001xx s 000 0 eng 10.1007/BF02207381 doi (NATIONALLICENCE)springer-10.1007/BF02207381 Wilkinson Mark Department of Geology, University of Bristol, Wills Memorial Building Queen Street, BS8 IRJ, Bristol, England aut A commentary on Ridley's cladistic solution to the species problem [Elektronische Daten] [Mark Wilkinson] The cladistic species concept proposed by Ridley (1989) rests on an undefined notion of speciation and its meaning is thus indeterminate. If the cladistic concept is made determinate through the definition of speciation, then it reduces to a form of whatever species concept is implicit in the definition of speciation and fails to be a truly alternative species concept. The cladistic formalism advocated by Ridley is designed to ensure that species are ‘monophyletic', that they are objectively real entities, and that they are individuals. It is argued that species need not be monophyletic in order to be real entities, and that ancestor-descendant relations are not the only relations that confer individuality on entities. The species problem is recast in terms of a futile quest for a definition of that single kind of entity to which the term species should uniquely apply. Kluwer Academic Publishers, 1990 Species nationallicence cladistics nationallicence monophyly nationallicence Biology and Philosophy Kluwer Academic Publishers 5/4(1990-10-01), 433-446 0169-3867 5:4<433 1990 5 10539 https://doi.org/10.1007/BF02207381 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02207381 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Wilkinson Mark Department of Geology, University of Bristol, Wills Memorial Building Queen Street, BS8 IRJ, Bristol, England aut NATIONALLICENCE 773 0- Biology and Philosophy Kluwer Academic Publishers 5/4(1990-10-01), 433-446 0169-3867 5:4<433 1990 5 10539 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer