Trilacuna simianshansp. n., male, SEM. A left palp, prolateral view B embolus system, prolateral view C left palp, retrolateral view D embolus system, retrolateral view E left palp, dorsal view F embolus system, dorsal view. Abbreviations: cp = circular projection; mp = membranous projection; ogr1 = outgrowth 1; ogr2 = outgrowth 2; rp = rectangular projection; spr = small projection.