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PlanMine 3.0—improvements to a mineable resource of flatworm biology and biodiversity
A gene prediction set that now assign existing transcripts to defined genomic coordinates is provided, and a phylogeny-aware interface that makes evolutionary species comparisons accessible to non-experts is provided.
Developmental diversity in free-living flatworms
A thorough overview of the embryonic development of the different groups of free-living (turbellarian) platyhelminths, including the Catenulida, Macrostomorpha, Polycladida, Lecithoepitheliata, Proseriata and Tricladida are presented, and their main features under a consensus phylogeny of the phylum are discussed.
A Broad Genomic Survey Reveals Multiple Origins and Frequent Losses in the Evolution of Respiratory Hemerythrins and Hemocyanins
It is demonstrated that the current distribution of respiratory proteins is due to several events of lateral gene transfer and/or massive gene loss, and that the last common metazoan ancestor had at least two hemerythrin domains, one hemocyanin M domain, and six tyrosinase domains.
The larval nervous system of the penis worm Priapulus caudatus (Ecdysozoa)
This study characterize the nervous system of the hatching larva and first lorica larva of the priapulid worm Priapulus caudatus by immunolabelling against acetylated and tyrosinated tubulin, pCaMKII, serotonin and FMRFamide, and helps illuminate the course of nervous system evolution in the Ecdysozoa.
The developmental basis for the recurrent evolution of deuterostomy and protostomy
It is proposed that the developmental relationships of mouth and blastoporal openings are secondary by-products of variations in axial and mesoderm development, which challenges the previous evolutionary emphasis on extant blastopora behaviours to explain the origin and diversification of bilaterian animals.
Clustered brachiopod Hox genes are not expressed collinearly and are associated with lophotrochozoan novelties
The shared and specific expression of Hox genes, together with Arx, Zic, and Notch pathway components in chaetae and shell fields in brachiopods, mollusks, and annelids provide molecular evidence supporting the conservation of the molecular basis for these lophotrochozoan hallmarks.
Evolution, divergence and loss of the Nodal signalling pathway: new data and a synthesis across the Bilateria.
Nodal expression is asymmetric in a number of spiralian lineages, indicating a possible ancestral role of the Nodal/Pitx cascade in the establishment of asymmetries across the Bilateria.