<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">E.O. Wiley III</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Are Monotypic Genera Paraphyletic</style></title><secondary-title><style face="normal" font="default" size="100%">Systematic Zoology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Chordata: general and systematic - Pisces</style></keyword><keyword><style  face="normal" font="default" size="100%">Ecology: environmental biology - Water research and fishery biology 62510</style></keyword><keyword><style  face="normal" font="default" size="100%">Evolution 07517</style></keyword><keyword><style  face="normal" font="default" size="100%">General biology - Taxonomy</style></keyword><keyword><style  face="normal" font="default" size="100%">nomenclature and terminology 01500</style></keyword><keyword><style  face="normal" font="default" size="100%">Osteichthyes [85206] Evolution and Adaptation Systematics and Taxonomy Pisces Vertebrata Chordata Animalia 00504</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1977</style></year></dates><number><style face="normal" font="default" size="100%">3</style></number><volume><style face="normal" font="default" size="100%">26</style></volume><pages><style face="normal" font="default" size="100%">352-355</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Platnick (1976) suggested that in a phylogenetic classification it is not possible to have monotypic genera under any condition other than an unresolved tri- or polychotomy, and that &quot;monotypic genera seem impossible as they must always exclude at least 1 other species that is a descendant of the most recent ancestor (i.e., they must always be paraphyletic).&quot; A logical extension of Platnick's reasoning that other monotypic supraspecific taxa (e.g., families, orders, etc.) are also paraphyletic, is contested and arguments are presented in support based on the evolution of Lepisosteus and the Actinopterygii.</style></abstract><notes><style face="normal" font="default" size="100%">Article</style></notes></record></records></xml>