bioRxiv preprint doi: https://doi.org/10.1101/610295; this version posted April 18, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. The “amphi”-brains of amphipods: New insights from the neuroanatomy of Parhyale hawaiensis (Dana, 1853) Christin Wittfoth, Steffen Harzsch, Carsten Wolff*, Andy Sombke* Christin Wittfoth, University of Greifswald, Zoological Institute and Museum, Dept. of Cytology and Evolutionary Biology, Soldmannstr. 23, 17487 Greifswald, Germany. https://orcid.org/0000-0001-6764-4941,
[email protected] Steffen Harzsch, University of Greifswald, Zoological Institute and Museum, Dept. of Cytology and Evolutionary Biology, Soldmannstr. 23, 17487 Greifswald, Germany. https://orcid.org/0000-0002-8645-3320, sharzsch@uni- greifswald.de Carsten Wolff, Humboldt University Berlin, Dept. of Biology, Comparative Zoology, Philippstr. 13, 10115 Berlin, Germany. http://orcid.org/0000-0002-5926-7338,
[email protected] Andy Sombke, University of Vienna, Department of Integrative Zoology, Althanstr. 14, 1090 Vienna, Austria. http://orcid.org/0000-0001-7383-440X,
[email protected] *shared last authorship ABSTRACT Background Over the last years, the amphipod crustacean Parhyale hawaiensis has developed into an attractive marine animal model for evolutionary developmental studies that offers several advantages over existing experimental organisms. It is easy to rear in laboratory conditions with embryos available year- round and amenable to numerous kinds of embryological and functional genetic manipulations. However, beyond these developmental and genetic analyses, research on the architecture of its nervous system is fragmentary.