Trilacuna songyuaesp. 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 G tibia and cymbium, prolateral view H same, details, white arrow shows the spear-like setae. Abbreviations: blo = broom-like outgrowth; cll = cluster of long line-like structure; nls = numerous, long setae; rlo = ribbon-like outgrowth; sso = sector-shaped outgrowth; ssp = sickle-shaped protuberance.