Copulatory apparatus of Biarmifer species. (A) B. cochleatus, adapted from Wieser (1954). (B) B. dayi, adapted from Inglis (1963). (C) B. hopperi, adapted from Sharma & Vincx (1982). (D) B. laminatus, adapted from Wieser (1954). (E) B. madrynensis, adapted from Pastor de Ward (2001). (F) B. punctata, adapted from Jensen (1985).
