Место издания:Sociedad Enomologica Aragonesa (SEA) Zaragoza, Spain
Первая страница:177
Последняя страница:196
Аннотация:An assessment of two main questions of the artropod phylogeny: 1) the position of the Arthropoda in the metazoan phylogenetic tree; 2) the phylogenetic relationships of the main groups within the Arthropoda was performed basing on the analysis of the 18S rRNA gene sequences data. Molecular synapomorphies for subphyla were found in the primary structure of 18S rRNA, but not in the secondary one. Pantopoda, Chelicerata and Myriapoda appear to retain a complex of symplesiomorphic characters, wich may cause erroneous clustering of these groups in phylogenetic trees inferred by traditional algorithms. Each of Pantopoda + Chelicerata or Manibulata group have as low as a few clear synapomorphic nucleotide substitutions, and hence monophyly of these groups will not be strongly proved by comparison of 18S rRNA gene sequences only.