Description of Acrobeloides arctowskii sp. n. (Rhabditida: Cephalobidae) from King George Island, Antarctica

摘要

A new species of Acrobeloides, A. arctowskii sp. n., is described from soil around roots of Deschampsia antarctica on King George Island, South Shetland Islands, Antarctica. The new species adds to the Antarctic terrestrial nematode fauna and resembles most closely A. arenicola Abolafia & Perm-Santiago, 2003 by having acute labial probolae, five incisures in lateral field and an acute conoid tail. It differs from A. arenicola in its longer body (L = 804-1101 um vs L = 476-729 mu m), longer post-vulval uterine branch (4.3-6.5 mu m vs 24-40 mu m), strongly protruding vulval lips (vs continuous with body contour), longer spicules (41-48 um vs 24-27 mu m) and longer gubemaculum (21-27 um vs 14-1.5 mu m).