Waclaw Tworzydlo received his PhD from the Jagiellonian University in 2006 and is currently Associate Professor in zoology and developmental biology at the Jagiellonian University in Krakow. Szczepan M. Bilinski received his PhD from the Jagiellonian University in 1975 and is currently Secretary General of the Polish Academy of Arts and Sciences and Professor of zoology, cell and developmental biology at the Jagiellonian University in Krakow.

• Part I. Theoretical Background.- Reflections on Model Organisms in Evolutionary Developmental Biology.- Hourglass or Twisted Ribbon?.- Ambulacrarians and the Ancestry of Deuterostome Nervous Systems.- Part II. New and Emerging Model Systems in Evo-Devo Research.- Oikopleura Dioica: An Emergent Chordate Model to Study the Impact of Gene Loss on the Evolution of the Mechanisms of Development.- Neuropeptides, Peptide Hormones, and Their Receptors of a Tunicate, Ciona Intestinalis.- Emergence of Embryo Shape during Cleavage Divisions.- Sex Determination, Sexual Development, and Sex Change in Slipper Snails.- The Cricket Gryllus Bimaculatus: Techniques for Quantitative and Functional Genetic Analyses of Cricket Biology.- The Rove Beetle Creophilus Maxillosus as a Model System to Study Asymmetric Division, Oocyte Specification, and the Germ-Somatic Cell Signaling.- Cell Biology of the Tardigrades – Current Knowledge and Perspectives.- Development of Xenoturbellida.- Cellular and Molecular Mechanisms of Hydra Regeneration.- Paramecium Biology.- Part III. Evo-Devo in Comparative Context.- Insights into Germline Development and Differentiation in Molluscs and Reptiles: The Use of Molecular Markers in the Study of Non-Model Animals.- Molecular Markers in the Study of Non-model Vertebrates: Their Significant Contributions to the Current Knowledge of Tetrapod Glial Cells and Fish Olfactory Neurons.- Embryogenesis of Marsupial Frogs (Hemiphractidae), and the Changes that Accompany Terrestrial Development in Frogs.- Evolution and Regulation of Limb Regeneration in Arthropods.- Viviparity in Two Closely Related Epizoic Dermapterans Relies on Disparate Modifications of Reproductive Systems and Embryogenesis.- Morphology of Ovaries and Oogenesis in Chelicerates.- Reproduction, Gonad Structure and Oogenesis in Tardigrades.- Architecture and Life History of Female Germ-Line Cysts in Clitellate Annelids.