Lineage tracing at single-cell resolution reveals the presence of mesoteloblasts, the embryonic origin of mesodermal growth zone cells, and diverse cell cycling patterns of these lineages in the 'Polychaete' annelid Platynereis.

A molecular profiling approach to quantify transcripts and proteins from identical samples allows study of molecular effects of maturation, sexual differentiation and the endogenous circalunar clock in a marine worm.

The larvae of an annelid worm use nitric oxide signalling to activate the neural pathways needed to swim away from the harmful ultraviolet light of the sun.

Molecular, cellular and behavioral genetic approaches in Platynereis dumerilii indicate that r-Opsins can act as ancient, light-dependent modulators of mechanosensation, and suggest that light-independent mechanosensory roles of r-Opsins evolved secondarily.

The recently characterized opsin group of xenopsins is likely a major player in animal eye evolution and may have been present in an ancient, highly plastic eye photoreceptor cell type.

A small brain-derived lipid prevents bristle worms from entering maturation and death, challenging current views of hormone evolution and pesticide specificity.

A map of a neuronal circuit in a marine worm reveals how simple networks of neurons can control behavior.

A new method using a motorised ultramicrotome and open-source software allows semi-automatic targeting of regions of interest for electron microscopy.

In a zooplankton larva, ciliary and rhabdomeric photoreceptor cells work antagonistically to form a spectral depth gauge.

Volume-EM reconstruction of a whole-body desmosomal connectome including all muscles and their desmosomal partners in a Platynereis larva provides a detailed view of the organisation of the entire locomotor system in an animal.