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Fig. 24 | Frontiers in Zoology

Fig. 24

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

Fig. 24

Examples showing character states concerned with the origin of the dorsal and ventral basi-ischium muscles of the 4th pereiopod (character 28) in axial skeletons seen from different perspectives. A Varunidae (Thoracotremata), B Matutidae (Calappoidea), C, D Dorippidae (Dorippoidea), E–H Carcinidae (Portunoidea). DorsBas P4 4th pereiopod dorsal basi-ischium muscle, IntPl 6/7 interopleurite between thoracomeres 6 and 7, IntSt interosternite (with number pair indicating thoracomeres between which it is situated), MP median plate, VentrBas P4 4th pereiopod ventral basi-ischium muscle

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Frontiers in Zoology

ISSN: 1742-9994