Antygomonas incomitata gen. et sp.n. (Cyclorhagida, Kinorhyncha) and its phylogenetic relationships

A new genus and species of Kinorhyncha from the Bay of Vestar (northern Adriatic Sea) is described. The single male specimen was collected from suhtidal medium-grained sand. Autapo-morphies of Antygomonas incomitata gen. ct sp.n. are the occurrence of 32 interstitial placids, three lateral spines on the 10th zonitc, the subdorsal sculpture on the 12th zonitc, two mid-dorsal spines on the 13th zonitc, and a special cuticular formation of the trunk zonites 4-13 which show a mid-ventral articulation zone but no lateral ones. The relationships of Antygomonas incomitata within the Cyclorhagida are discussed. The term zonite (instead of segment), introduced by Zelinka (1928) for the repetitive arrangement of the cuticle, epidermis, nervous system, sense organs, and muscles in Kinorhyncha is discussed.