ИСТИНА

We describe two new for science Dendronotus taxa. Fruitful collaboration with divers brings valuable knowledge. Dendronotus keatleyae is a new species from Norway and Northern Ireland. Dendronotus arcticus gartensis from the Trondheimsfjord is a new subspecies with a remarkable similarity to Dendronotus yrjargul, also found in the same area. Dendronotus keatleyae is named after diver Libby Keatley. Diving and underwater photography is valuable for increasing knowledge about nudibranchs.