Name rejected vs. Hemiaulus Heiberg 1863 (see ICBN 1988, p. 120, ref. 006921). Two Hemiaulus species are listed in Ehrenberg 1844 (p. 203), H. antarcticus and H.? australis, H. antarcticus is the holotype (the other species being questionably included). Heiberg 1863 (ref. 000471) p. 45 publishes an emended description of the genus Hemiaulus Ehrenberg, and describes three new species, H. proteus, H. hostilis, H. februatus. Hemiaulus Heiberg is a later homonym of Hemiaulus Ehrenberg. The choice of H. polycystinorum as the type by Boyer 1927 (ref. 000155), p. 127, is not admissible, this species not being one of the original species included by Ehrenberg.?