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Fig. 25 | Frontiers in Zoology

Fig. 25

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

Fig. 25

Examples showing character states concerned with the origin of the anterior coxa muscle of the 5th pereiopod (character 34) in axial skeletons seen from posterio-dorsal (A–D) and from dorsal (E, F). Note that in the P5-swimmers (E, F), long muscle fibres originate at the median plate, and that there are also shorter fibres originating at the median plate in Thia (C). AntCox P5 5th pereiopod anterior coxa muscle, IntPl 7/8 interopleurite between thoracomeres 7 and 8, IntSt interosternite (with number pair indicating thoracomeres between which it is situated), JP junction plate, MP median plate

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Frontiers in Zoology

ISSN: 1742-9994