[Copepoda] Plan of copepod body organization (tagmosis) in which the major body articulation is located between the fifth pedigerous somite (Pd5) (= sixth thoracic somite), primitively bearing the P5, and the genital somite (Gns) (Fig. Co.6.1A, Fig. Co.1a , Structure of Calanoid body). Gymnoplean tagmosis is typically for Order Calanoida and Order Platycopioida — the latter is not treated in this volume) (cf. podoplean tagmosis).