Cnidarian immunity : a tale of two barriers / René Augustin and Thomas C.G. Bosch -- Gastropod immunobiology / Eric S. Loker -- Bivalve immunity / Linsheng Song [and others] -- Earthworm immunity / Martin Bilej [and others] -- Leech immunity : from brain to peripheral responses / Aurélie Tasiemski and Michel Salzet -- Innate immunity in C. elegans / Ilka Engelmann and Nathalie Pujol -- Immunocompetent molecules and their response network in horseshoe crabs / Shun-ichiro Kawabata -- Tick innate immunity / Petr Kopáček [and others] -- Beetle immunity / Ji-Won Park [and others] -- Immunity in Lepidopteran insects / Haobo Jiang, Andreas Vilcinskas, and Michael R. Kanost -- Fly immunity : recognition of pathogens and induction of immune responses / Shoichiro Kurata -- Mosquito immunity / Julián F. Hillyer -- Crustacean immunity / Lage Cerenius [and others] -- Echinoderm immunity / L. Courtney Smith [and others] -- Urochordate immunity barriers / Masaru Nonaka and Honoo Satake