1: Andreas Schmidt-Rhaesa, Steffen Harzsch and Günter Purschke: Introduction
2: Adrian Horridge: Perspective - How to write an Invertebrate Anatomy Book
3: Sally P. Leys and Nathan Farrar: Porifera
4: Detlev Arendt: Perspective - Evolution of neural cell types
5: Thomas Leitz: Cnidaria
6: David K. Simmons and Mark Q. Martindale: Ctenophora
7: Andreas Hejnol: Acoelomorpha
8: Thomas Stach: Xenoturbella
9: Heinrich Reichert and Nadia Riebli: Perspective -The first brain
10: Volker Hartenstein: Free living Plathelminthes
11: Natalia M. Biserova: Neodermata
12: Andreas Schmidt-Rhaesa: Gnathostomulida
13: Rick Hochberg: Rotifera
14: Henrike Semmler Le: Acanthocephala
15: Andreas Schmidt-Rhaesa and Birgen H. Rothe: Gastrotricha
16: Pat Beckers and Jörn van Döhren: Nemertini
17: Andreas Wanninger: Kamptozoa (Entoprocta)
18: Julia D. Sigwart and Lauren H. Sumner-Rooney: Mollusca: Caudofoveata, Monoplacophora, Polyplacophora, Scaphopoda, Solenogastres
19: Andreas Wanninger: Mollusca: Bivalvia
20: Elena E. Voronezhskaya and Roger P. Croll: Mollusca: Gastropoda
21: Tim Wollesen: Mollusca: Cephalopoda
22: Conrad Helm and Christoph Bleidorn: Annelida: Myzostomida
23: Alen Kristof and Anastassya S. Maiorova: Annelida: Sipuncula
24: Günter Purschke: Annelida: Basal groups and Pleistoannelida
25: Stefan Richter, Thomas Stach and Andreas Wanninger: Perspective - Nervous system development in bilaterian larvae - testing the concept of 'primary larvae'
26: Alexander Gruhl: Bryozoa (Ectoprocta)
27: Carsten Lüter: Brachiopoda
28: Elena Temereva: Phoronida
29: Ricardo Neves: Cycliophora
30: Andreas Schmidt-Rhaesa and Birgen Rothe: Cycloneuralia
31: Corinna Schulze and Dennis Persson: Tardigrada
32: Georg Mayer: Onychophora
33: Gerhard Scholtz: Perspective - Heads and Brains in Arthropods: 40 years after the 'endless dispute'
34: Jürgen Rybak: Perspective - Brain Atlases for studying neuronal circuitry in arthropods
35: Georg Brenneis: Pycnogonida (Pantopoda)
36: Barbara Battelle, Andy Sombke and Steffen Harzsch: Xiphosura
37: Harald Wolf: Scorpiones
38: Steffen Harzsch, Andy Sombke, Elisabeth Lipke, Peter Michalik, Roland Melzer: Arachnida (exkl. Scorpiones)
39: Andi Sombke and Jörg Rosenberg: Myriapoda
40: Angelika Stollewerk: Perspective - Evolution of neurogenesis in arthropods - open questions and future directions
41: D.C. Sandeman, J.L. Benton and B.S. Beltz: Research Spotlight - Adult neurogenesis in the decapod crustacean brain: The immune system supplies neural progenitors
42: Martin Stegner and Stephan Richter: Cephalocarida
43: Martin Fritsch and Stephan Richter: Maxillopoda and Branchiopoda
44: Torben Stemme and Steffen Harzsch: Remipedia
45: Manfred Schmidt: Malacostraca
46: Wolfgang Stein, Carola Städele and Carmen R. Smarandache-Wellmann: Perspective - Evolutionary aspects of motor control and coordination: the central pattern generators in the crustacean stomatogastric and swimmeret systems
47: Gabriella Wolff and Nicholas J. Strausfeld: Research Spotlight - The brain of Hexapoda
48: Silke Sachse and Bill S. Hansson: Research Spotlight - Olfactory coding in Drosophila melanogaster
49: Eric Warrant and Uwe Homberg: Research Spotlight - Insect polarisation vision: peripheral and central mechanisms
50: Steffen Harzsch, Ivan Perez and Carsten H.G. Müller: Chaetognatha
51: Vladimir Mashanov, Olga Zueva, Tamara Rubilar, Lucia Epherra and Jose E. García-Arrarás: Echinodermata
52: Thomas Stach: Hemichordata
53: Lucia Manni and Roberta Pennati: Tunicata
54: Thurston Lacalli and Thomas Stach: Acrania
55: Thurston Lacalli: Perspective - The Origin of Vertebrate Neural Organization

Andreas Schmidt-Rhaesa studied biology at the universities in Gießen and Göttingen, Germany, where he received his PhD in 1996, working on the ultrastructure and phylogeny of horsehair worms (Nematomorpha). As postdoc, he worked in Jim Garey´s lab at the Duquesne University in Pittsburgh and at the University of South Florida in Tampa, USA on molecular systematics of nematomorphs. Between 1998 and 2004 he was scientific assistant in the working group of Thomas Bartolomaeus at the University of Bielefeld, where he then did a postdoc between 2004 and 2007. Since April 2007 he has been Curator for Lower Invertebrates at the Zoological Museum of the University of Hamburg. His research interests include animal morphology and systematics, with particular interest in the taxa Nematomorpha, Gastrotricha and Priapulida.

Steffen Harzsch obtained his PhD from the University of Bielefeld, Germany in 1995 working on neurogenesis in crustacean larvae at the Department of Neurobiology and in the lab of Klaus Anger at the Marine Biological Station on the island of Helgoland in the North Sea. After a postodc at Wellesley College, Massachusetts, and a Heisenberg Fellowship of the German Research Foundation, he worked from 2007 to 2008 as a group leader for neuroanatomy in the Department of Evolutionary Neuroethology at the Max Planck Institute for Chemical Ecology in Jena, Germany. In 2009, he received tenure as a full Professor of Cytology and Evolutionary Biology at the Ernst Moritz Arndt University of Greifswald, Germany. His expertise is in studies on neurophylogeny and NeuroEvoDevo of arthropods and Chaetognatha.

Günter Purschke, Professor at the University of Osnabrueck, Germany, is working on morphology, systematics, phylogeny and evolution of Annelida and related taxa. His research interests currently focus on evolution and diversity of photoreceptor cells and eyes, of the central nervous system and body wall musculature. He studied biology and chemistry at the University of Göttingen, and earned his PhD in Zoology in 1984. He was subsequently assistant at the University of Osnabrueck to the chair of Systematic Zoology (Prof. W. Westheide). After having received the venia legendi for Zoology (1997) he was appointed as extraordinary professor in 2002. Since 2004 he has been working with the chair of Zoology and Developmental Biology (Professor A. Paululat).


Contributors:
- Detlev Arendt, European Molecular Biology Laboratory, Heidelberg, Germany
- Barbara Batelle, University of Florida, Whitney Laboratory for Marine Bioscience, Florida, USA
- Patrick Beckers, University of Bonn, Institute of Evolutionary Biology and Ecology, Bonn, Germany
- Barbara S .Beltz, Wellesley College, Wellesley, USA
- Jeannie Benton, Wellesley College, Wellesley, USA
- Natalia M. Biserova, Moscow State University, Faculty of Biology, Moscow, Russia
- Christoph Bleidorn, University of Leipzig, Molecular Evolution and Animal Systematics, Leipzig, Germany
- Georg Brenneis, Humboldt-University Berlin, Institute for Biology, Berlin, Germany
- Roger P. Croll, Dalhousie University, Department of Physiology & Biophysics, Halifax, Canada
- Lucia Epherra, Centro Nacional Patagónico (CENPAT), Puerto Madryn, Argentina
- Farrar, Nathan University of Alberta, Edmonton, Canada
- Martin Fritsch, University of Vienna, Department of Integrative Zoology, Vienna, Austria
- Jose E.García-Arrarás, University of Puerto Rico, Department of Biology, San Juan, Puerto Rico
- Alexander Gruhl, Max-Planck-Institute for Marine Microbiology, Department of Symbiosis, Bremen, Germany
- Bill S. Hanson, Max-Planck-Institute for Chemical Ecology, Department for Evolutionary Neuroethology, Jena, Germany
- Volker Hartenstein, University of California, Department of Molecular, Cell, and Developmental Biology, Los Angeles, USA
- Steffen Harzsch, Ernst-Moritz-Arndt University Greifswald, Zoological Institute and Museum, Greifswald, Germany
- Andreas Hejnol, University of Bergen, Sars International Centre for Marine Molecular Biology, Bergen, Norway
- Conrad Helm, University of Leipzig, Molecular Evolution and Animal Systematics, Leipzig, Germany
- Rick Hochberg, University of Massachusetts, Lowell, USA
- Uwe Homberg, Philipps-University Marburg, Faculty of Biology, Marburg, Germany
- Adrian Horridge, Australian National University, Canberra, Australia
- Alen Kristof, University of Vienna, Department of Integrative Zoology, Vienna, Austria
- Thurston Lacalli, University of Victoria, Biology Department, Victoria, Canada
- Thomas Leitz, Technical University Kaiserslautern, Kaiserslautern, Germany
- Sally P. Leys, University of Alberta, Edmonton, Canada
- Elisabeth Lipke, Ernst-Moritz-Arndt University Greifswald, Zoological Institute and Museum, Greifswald, Germany
- Carsten Lüter, Museum für Naturkunde (Natural History Museum), Berlin, Germany
- Anastassya S. Maiorova, Far Eastern Federal University, A. V. Zhirmunsky Institute for Marine Biology, Vladivostok, Russia
- Lucia Manni, University of Padova, Department of Biology, Padova, Italy
- Mark Q. Martindale, The Whitney Laboratory for Marine Bioscience, St. Augustine, Florida, USA
- Vladimir Mashanov, University of Puerto Rico, Department of Biology, San Juan, Puerto Rico
- Georg Mayer, University Leipzig, Institute for Biology, Leipzig, Germany
- Roland Melzer, Zoologische Staatssammlung, München, Germany
- Peter Michalik, Ernst-Moritz-Arndt University Greifswald, Zoological Institute and Museum, Greifswald, Germany
- Carsten H.G. Müller, University of Arizona, Department of Neuroscience, Tucson, USA
- Ricardo Neves, University of Basel, Biozentrum, Basel, Switzerland
- Roberta Pennati, University of Milan, Department of Biosciences, Milan, Italy
- Yvan Perez, Aix-Marseille Université, Institut Méditerranéen de Biodiversité et d'Ecologie, Marseille, France
- Dennis Persson, Natural History Museum of Denmark, Copenhagen, Denmark
- Günter Purschke, University Osnabrueck, Department Biology/Chemistry, Osnabrück, Germany
- Heinrich Reichert, University of Basel, Biozentrum, Basel, Switzerland
- Stefan Richter, University Rostock, Allgemeine & Spezielle Zoologie, Rostock, Germany
- Nadia Riebli, University of Basel, Biozentrum, Basel, Switzerland
- Jörg Rosenberg, Soest, Germany
- Birgen Holger Rothe, Halle, Germany
- Tamara Rubilar, Centro Nacional Patagónico (CENPAT), Puerto Madryn, Argentina
- Jürgen Rybak, Max-Planck-Institute for Chemical Ecology, Department for Evolutionary Neuroethology, Jena, Germany
- Silke Sachse, Max-Planck-Institute for Chemical Ecology, Department for Evolutionary Neuroethology, Jena, Germany
- David C.Sandeman, Wellesley College, Wellesley, USA
- Manfred Schmidt, Georgia State University, Neuroscience Institute, Atlanta, USA
- Andreas Schmidt-Rhaesa, University Hamburg, Centrum für Naturkunde, Hamburg, Germany
- Gerhard Scholtz, Humboldt-University Berlin, Institute for Biology, Berlin, Germany
- Corinna Schulze, Hanau, Germany
- Thomas Schwaha, University of Vienna, Department of Integrative Zoology, Vienna, Austria
- Henrike Semmler Le, Natural History Museum of Denmark, Copenhagen, Denmark
- Julia D. Sigwart, Queen's University Belfast, Marine Laboratory, Portaferry, N. Ireland
- David K. Simmons, The Whitney Laboratory for Marine Bioscience, St. Augustine, Florida, USA
- Carmen R.Smarandache-Wellmann, University of Cologne, Zoological Institute, Cologne, Germany
- Andy Sombke, Ernst-Moritz-Arndt University Greifswald, Zoological Institute and Museum, Greifswald, Germany
- Thomas Stach, Humboldt-University Berlin, Institute for Biology, Berlin, Germany
- Carola Städele, Ulm University, Institute of Neurobiology, Ulm, Germany
- Martin Stegner, University Rostock, Allgemeine & Spezielle Zoologie, Rostock, Germany
- Wolfgang Stein, Illinois State University, School of Biological Sciences, Normal, USA
- Torben Stemme, University of Veterinary Medicine Hannover, Division of Cell Biology, Hannover, Germany
- Angelika Stollewerk, Queen Mary University of London, School of Biological and Chemical Sciences, London, UK
- Nicholas J.Strausfeld, University of Arizona, Department of Neuroscience, Tucson, USA
- Lauren H. Sumner-Rooney, Queen's University Belfast, Marine Laboratory, Portaferry, N. Ireland
- Elena Temereva, Moscow State University, Invertebrate Zoology, Moscow, Russia
- Jörn Von Döhren, University of Bonn, Institute of Evolutionary Biology and Ecology, Bonn, Germany
- Elena E.Voronezhskaya, Russian Academy of Sciences, Department of Developmental Neurobiology, Moscow, Russia
- Andreas Wanninger, University of Vienna, Department of Integrative Zoology, Vienna, Austria
- Eric Warrant, University of Lund, Lund Vision Group, Department of Biology, Lund, Sweden
- Harald Wolf, Ulm University, Institute of Neurobiology, Ulm, Germany
- Gabriella Wolff, University of Arizona, Department of Neuroscience, Tucson, USA
- Tim Wollesen, University of Vienna, Department of Integrative Zoology, Vienna, Austria
- Olga Zueva, University of Puerto Rico, Department of Biology, San Juan, Puerto Rico