ZooCELL brings together leading researchers across Europe to explore how cellular diversity emerges and evolves, shaping the complexity of animal life.

All animals need to sense their environments. The ability to detect light, temperature, chemicals, sound, vibrations and other stimuli depends on an extraordinary range of sensory cell types. The diversity and relationships between these receptor cells across the animal phyla, how they have been adapted, reused, tweaked and sometimes lost, is little known but is crucial for understanding how animals survive and thrive in diverse environments. Most sensory cells are characterised by complex shapes and molecular machinery, first discovered by meticulous electron microscopy in the past decades. More recently, this has been complemented by genetic studies of their development and differentiation in various animal models.

These two research programmes have, however, largely remained separate, and a unified morphological and molecular understanding of how the diversity of animal sensory cells has evolved is lacking. Our aim in ZooCELL is to create a comprehensive view of sensory cell type evolution based on the discovery of recurrent patterns of genetic and subcellular structure across a wide range of new animal models. To this end, we will combine single-cell genomics, correlative light and electron microscopy,