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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. Expand
Phylogenomics Revives Traditional Views on Deep Animal Relationships
It is shown that the sponges (Porifera) are monophyletic and not paraphyletic as repeatedly proposed, thus undermining the idea that ancestral metazoans had a sponge-like body plan and that the most likely position for the ctenophores is together with the cnidarians in a "coelenterate" clade. Expand
Slow mitochondrial DNA sequence evolution in the Anthozoa (Cnidaria)
Slow evolution and unique characteristics may be common in primitive metazoans, suggesting that patterns of mtDNA evolution in these organisms differ from that in other animal systems. Expand
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. Expand
Oxygen isotope fractionation in marine aragonite of coralline sponges
Oxygen isotope values of the extant Caribbean coralline sponge Ceratoporella nicholsoni are compared with published temperatures and δ18O of water calculated from salinities. The measured values fromExpand
Deep metazoan phylogeny: when different genes tell different stories.
The accuracy of phylogenetic inference may be substantially improved by selecting genes that evolve slowly across the Metazoa and applying more realistic substitution models, as well as modifying gene sampling and the taxonomic composition of the outgroup. Expand
Calcium isotope fractionation in calcite and aragonite
Abstract Calcium isotope fractionation was measured on skeletal aragonite and calcite from different marine biota and on inorganic calcite. Precipitation temperatures ranged from 0 to 28°C. CalciumExpand
Low variation in partial cytochrome oxidase subunit I (COI) mitochondrial sequences in the coralline demosponge Astrosclera willeyana across the Indo-Pacific
COI data presented here do not support the hypothesis of at least two sibling species belonging to genus Astrosclera in the Pacific, and add to the growing evidence of a general mtDNA conservation in sponges. Expand
The reef cave dwelling ultraconservative coralline demospongeAstrosclera willeyanaLister 1900 from the Indo-Pacific
The choanosome, contiguous with the ectosome but with a more-or-less sharp transition, comprises the major part of the living tissue inAstrosclera, characterized by small choanocyte chambers and a high density of bacterial symbionts. Expand
Developmental expression of transcription factor genes in a demosponge: insights into the origin of metazoan multicellularity
It is demonstrated that members of a range of transcription factor gene classes are expressed during the development of the demosponge Reniera, including ANTP, Pax, POU, LIM‐HD, Sox, nuclear receptor, Fox (forkhead), T‐box, Mef2, and Ets genes. Expand