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    1. Developmental Biology
    2. Evolutionary Biology

    Maternally regulated gastrulation as a source of variation contributing to cavefish forebrain evolution

    Jorge Torres-Paz et al.
    Phenotypic evolution can originate from variations in very precocious developmental events, starting even before fecundation, during the fabrication of the egg in the mother's gonad.
    1. Evolutionary Biology

    Giant extinct caiman breaks constraint on the axial skeleton of extant crocodylians

    Torsten M Scheyer et al.
    The giant caiman Purussaurus from the Miocene of Venezuela is the first recorded member of crown Crocodylia having three sacrals, thus breaking the otherwise strict vertebral constraint of the group.
    1. Cell Biology
    2. Neuroscience

    Speed and segmentation control mechanisms characterized in rhythmically-active circuits created from spinal neurons produced from genetically-tagged embryonic stem cells

    Matthew J Sternfeld et al.
    Stem cell derived ventral-spinal cord excitatory neurons self-assemble into a rhythmically bursting neural network whose speed and intercellular coordination are both instructively modulated by cell-type specific interactions with inhibitory neurons.
    1. Developmental Biology
    2. Evolutionary Biology

    Molecular insights into the origin of the Hox-TALE patterning system

    Bruno Hudry et al.
    Interactions between Hox and TALE genes, which generate bilaterally symmetrical body plans, originated in early multicellular animals.
    1. Developmental Biology

    A gradient of Wnt activity positions the neurosensory domains of the inner ear

    Magdalena Żak, Nicolas Daudet
    Manipulations of Wnt signalling in the chicken embryo reveal how it controls in a dose-dependent manner the formation of the neurosensory territories of the early developing inner ear.
    1. Computational and Systems Biology
    2. Developmental Biology

    Dynamics of BMP signaling and distribution during zebrafish dorsal-ventral patterning

    Autumn P Pomreinke et al.
    Patterning of the dorsal-ventral axis in zebrafish is mediated by a graded source-sink mechanism in which diffusing BMP, produced from a ventrally biased source, is inhibited by dorsally-produced chordin.
    1. Computational and Systems Biology
    2. Developmental Biology

    A re-inducible gap gene cascade patterns the anterior–posterior axis of insects in a threshold-free fashion

    Alena Boos et al.
    The body axis of insects is divided into different fates using a self-regulatory and threshold-free mechanism.
    1. Computational and Systems Biology
    2. Developmental Biology

    Systems biology derived source-sink mechanism of BMP gradient formation

    Joseph Zinski et al.
    Embryo-wide quantitative analysis of BMP signaling in zebrafish embryos, combined with a mathematical model-based computational screen, challenges the prevailing model of an antagonist counter-gradient shaping the gastrula BMP morphogen gradient and supports an antagonist sink with BMP diffusion mechanism.
    1. Developmental Biology

    Fgf4 maintains Hes7 levels critical for normal somite segmentation clock function

    Matthew J Anderson et al.
    Quantification of fluorescently labeled mRNAs reveals that Fgf4 regulates Notch oscillations in the segmentation clock that controls somitogenesis.
    1. Developmental Biology
    2. Evolutionary Biology

    Resegmentation is an ancestral feature of the gnathostome vertebral skeleton

    Katharine E Criswell, J Andrew Gillis
    Shared complexities of backbone segmentation between cartilaginous fishes and tetrapods originate much earlier in vertebrate evolution than previously thought.