Fig. 13

A–B. Overview of the raptorial apparatus of Gongylus gongylodes with labelled spine types. The tiltable ds3 is high lightened by a red dot. C–N. Scanning electron microscope images with details of the spines, their bases and sockets. C. Tip of the tibia with ts and avts, lateral view. D. Smoothened ts. E. Detail of the smoothened base of the ts. F. Detail of the contact surface of the ts, lateral view. G. Detail of the base of avts, medial view. H. Detail of the smoothened avts. I. Detail of the base of pvfs, lateral view. J. Smoothened pvfs. K. Smoothened l avfs and s avfs. L. Detail of the base of pvfs, medial view. M. Detail of the lateral side of the tip of s avfs. N. Smoothened ds3 and ds4. Ds 3 is tiltable. Abbreviations: avts, anteroventral tibial spines; ds3, 3rd discoidal spine; ds4, 4th discoidal spine; l avfs, long anteroventral femoral spines; pvfs, posteroventral femoral spines; s avfs, short anteroventral femoral spines; ts, tibial spur.