[The distribution of catecholamine-containing neurons in the brain of Pagurus middendorffii and Paralithodes camtschaticus (Anomura, Decapoda)].

Immunocytochemical methods using an antibody raised against tyrosine hydroxylase (TH) were investigated the distribution of catecholamine-containing neurons in the brain of two species of crustacean Pagurus middendorffii and Paralithodes camtschaticus. Morphologically different types of TH-immunoreactive neurons are found in the cell clusters in the protocerebrum, deutocerebrum, and tritocerebrum of divisions the brain in both species studied crustaceans. The similarities and differences in topography, numbers and morphology of TH-positive neurons in the different structures of the brain in the hermit crab and king crab are discussed.