Resolving Difficult Phylogenetic Questions: Why More Sequences Are Not Enough
Three recent large-scale phylogenomics studies, which deal with the early diversification of animals, produced highly incongruent findings despite the use of considerable sequence data, suggesting that merely adding more sequences is not enough to resolve the inconsistencies.
Phylogenomics Revives Traditional Views on Deep Animal Relationships
Molecular phylogeny of Demospongiae: implications for classification and scenarios of character evolution.
Improved Phylogenomic Taxon Sampling Noticeably Affects Nonbilaterian Relationships
This work recovers monophyletic Porifera as the sister group to all other Metazoa and suggests that the basal position of the fast-evolving Ctenophora proposed by Dunn et al. was due to LBA and that broad taxon sampling is of fundamental importance to metazoan phylogenomic analyses.
Sponge paraphyly and the origin of Metazoa
- C. Borchiellini, M. Manuel, E. Alivon, N. Boury‐Esnault, J. Vacelet, Y. Le Parco
- BiologyJournal of Evolutionary Biology
- 1 January 2001
The polymerase chain reaction is used to amplify almost the entire nucleic acid sequence of the 18S rDNA from several hexactinellid, demosponge and calcareous sponge species to suggest that sponges are paraphyletic, the Calcarea being more related to monophyletic Eumetazoa than to the siliceous spongees.
A Large and Consistent Phylogenomic Dataset Supports Sponges as the Sister Group to All Other Animals
Are Hox Genes Ancestrally Involved in Axial Patterning? Evidence from the Hydrozoan Clytia hemisphaerica (Cnidaria)
The phylogenetic analyses do not support an origin of ParaHox and Hox genes by duplication of an ancestral ProtoHox cluster, and reveal a diversification of the cnidarian HOX9-14 genes into three groups called A, B, C.
Somatic stem cells express Piwi and Vasa genes in an adult ctenophore: ancient association of "germline genes" with stemness.
Molecular phylogenetics of Thecata (Hydrozoa, Cnidaria) reveals long-term maintenance of life history traits despite high frequency of recent character changes.
Hypotheses of species selection are proposed to explain the apparent long-term stability of these life history traits despite a high frequency of character change in hydrozoan cnidarians.
Phylogeny and evolution of calcareous sponges: monophyly of calcinea and calcaronea, high level of morphological homoplasy, and the primitive nature of axial symmetry.
- M. Manuel, C. Borchiellini, E. Alivon, Y. Le Parco, J. Vacelet, N. Boury‐Esnault
- BiologySystematic Biology
- 1 June 2003
The phylogeny implies that characters of the skeleton architecture are highly homoplastic, as areCharacters of the aquiferous system, however, axial symmetry seems to be primitive for all Calcispongia, a conclusion that has potentially far-reaching implications for hypotheses of early body plan evolution in Metazoa.