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Figure 1


Fig. 1. Odontodactylus scyllarus raptorial appendage. (A) A resting peacock mantis shrimp with the raptorial appendage circled. Raptorial appendages are used either for stabbing (dactyl open and extended) or for hammering (dactyl folded in and bulbous heel exposed, as shown here). (B) Lateral view of an isosurface rendering of segmented CT scan data of the left raptorial appendage. Each skeletal element has been pseudocolored to increase contrast. The isosurface threshold has been optimized for each element to illustrate the morphology and spatial relationships. (C) Ventral view of a shadowless volume rendering of left merus (m). Shading corresponds to degree of radio-opacity (mineralization), with lighter colors corresponding to greater mineralization and darker to poorly mineralized areas. Note the unmineralized region adjacent to the highly mineralized ventral bar (vb) extending proximally from the base of the meral-V. This unmineralized region may permit dorso-proximal flexion of the meral-V (v). (D) Lateral view of the merus using the same rendering technique as in C. s, saddle; c, carpus; p, propodus; d, dactyl. Scale bars, 4 mm.





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