Projected phase space diagram (PPSD) for SBGs (blue), MSGs (green), QINGs (red), and other Hydra members not in the HαIr sample (gray). Hexagons are early-type galaxies, and crosses are late-type galaxies. Yellow-filled markers indicate HI detections. Black curves delimit the escape velocity region, blue curves represent the stripping limit, and the vertical dashed line is the virial radius. The area within these curves traces four distinct regions: the stripping region (yellow), where galaxies are being heavily stripped of their gas content; the virialized region (red) where virialized galaxies lie; the central infalling region (blue) where galaxies with higher velocity are probably in their initial orbits while the rest are already settled inside the cluster; and the backsplashing region (gray) where galaxies start falling into the cluster or backsplashed.