Comparison between Lioberus ligneus (Reeve, 1858) and Lioberus agglutinans (Cantraine, 1835). A, B Lioberus ligneus, NHMW–MO-112930/LM/0173, Karpaz Peninsula, Turkish Republic of Northern Cyprus, Cyprus: right valve outer (A) and left valve inner (B) views C, D L. ligneus, Dahab, Egypt (H. Blatterer coll.): right valve outer (C) and left valve inner (D) views E, F Lioberus agglutinans, Olhão, Ilha da Barretta, Algarve, Portugal: right valve outer (E) and left valve inner (F) views G, H L. agglutinans, Tavira, off Cabanas, Algarve, Portugal: right valve outer (G) and left valve inner (H) views. Scale bars: 5 mm.