Thermocheres pacificus sp. nov., male A habitus, dorsal B urosome, ventral C rostrum D antennule (open circles indicate insertions of aesthetascs on opposite surface) E antenna F oral siphon G mandible and maxillule H maxilla I distal part of maxilla. Scale bars: 0.1 mm (A, B, F); 0.05 mm (C, D, G, H); 0.02 mm (E, I).