Figure 4. Shell and opercular valves. A in Molecular analysis reveals a cryptic species of Chthamalus (Crustacea: Cirripedia) in the Cape Verde Islands

Figure 4. Shell and opercular valves. A, Chthamalus sp. from Praia, Cape Verde, top view. B–D, scutum and tergum inner view: B, Chthamalus sp. from Praia, Cape Verde; C, Chthamalus stellatus from Las Palmas, Gran Canaria, Canary Islands; D, C. stellatus from Biarritz, France. E, scutum and tergum outer view, Chthamalus sp. from Praia, Cape Verde.