Serotonin (5-hydroxytryptamine, 5-HT) is acknowledged as a major neuromodulator of
nervous systems in both invertebrates and vertebrates. It has been proposed for several …

Cilia and flagella are fundamental units of motion in cellular biology. These beating, hair-like
organelles share a common basic structure but maintain widely varying functions in systems …

Brains contain networks of interconnected neurons and so knowing the network architecture
is essential for understanding brain function. We therefore mapped the synaptic-resolution …

Animal bodies are composed of cell types with unique expression programs that implement
their distinct locations, shapes, structures, and functions. Based on these properties, cell …

Pelagic larval stages are widespread across animals, yet it is unclear whether larvae were
present in the last common ancestor of animals or whether they evolved multiple times due …

Ciliated organisms are present in virtually every branch of the eukaryotic tree of life. In
diverse systems, cilia operate in a coordinated manner to drive fluid flows, or even propel …

Nervous systems coordinate effectors across the body during movements. We know little
about the cellular-level structure of synaptic circuits for such body-wide control. Here we …

Neurosecretory centers in animal brains use peptidergic signaling to influence physiology
and behavior. Understanding neurosecretory center function requires mapping cell types …

Among non-bilaterian animals, a larval apical sensory organ with integrated neurons is only
found in cnidarians. Within cnidarians, an apical organ with a ciliary tuft is mainly found in …

Abstract The Nereid Platynereis dumerilii (Audouin and Milne Edwards (Annales des
Sciences Naturelles 1: 195–269, 1833) is a marine annelid that belongs to the Nereididae, a …