FIG. 4 in Diagnosis of Arcturopsis Koehler, 1911 and redescription of A. giardi (Bonnier, 1896) (Crustacea, Isopoda, Arcturidae)

FIG. 4. — Arcturopsis giardi (Bonnier, 1896); A-C, (MNHN-Is5690); A, pleopod 1; B, penes (dorsal and ventral views); C, pleopod 2 with appendix masculina; D, pleopod 2 of juvenile with rudimentary appendix masculina (NMV J44928). Scale bars: A, C, D, 0.5 mm; B, 0.2 mm.