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Fig. 19 | Frontiers in Zoology

Fig. 19

From: New insights into the evolution of portunoid swimming crabs (Portunoidea, Heterotremata, Brachyura) and the brachyuran axial skeleton

Fig. 19

Examples showing character states concerned with the origin of the anterior coxa muscle of the 2nd pereiopod (character 25; A, B, D) and the shape of the anterior coxa muscle of the 3rd pereiopod (C) in axial skeletons seen from different perspectives. Note that in Liocarcinus depurator, for example, both muscles have a branch running along but not attaching at the medial side of the junction plate and originating at interopleurite 4/5 and 5/6, respectively (A, C). AntCox P2 2nd pereiopod anterior coxa muscle, AntCox P3 3rd pereiopod anterior coxa muscle, IntPl interopleurite (with number pair indicating thoracomeres between which it is situated), IntSt interosternite (with number pair indicating thoracomeres between which it is situated), JP junction plate, MP median plate, P2 proximal 2nd pereiopod podomeres, P3 proximal 3rd pereiopod podomeres, ST sella turcica

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