Phylum Cephalorhyncha, class Kinorhyncha. In: Buzhinskaja, G.N. (ed.), Illustrated key to the invertebrates of Eurasien Arctic Seas and adjacent deep waters, Vol. 2 Nemertea, Cephalorhyncha, Oligochaeta, Hirudinida, Pogonophora, Echiura, Sipuncula, Phoronida, and Brachiopoda - Adrianov, A. V. (Alaska Sea Grant, University of Alaska Fairbanks, Fairbanks, 2011)