FIGURE 4 in Upper Pleistocene blow flies (Diptera: Calliphoridae) trapped in fossilized crania of large mammals discovered from gravel pits in the Rhine rift valley from Hesse (Germany)

FIGURE 4. SEM-images of fossil remains (4.1, 4.3, 4.5, 4.7) in comparison of similar parts of the puparia of extant Protophormia terraenovae (4.2, 4.4, 4.6, 4.8). 4.1-2 Segment 1-4 of puparia, 4.3-4 mouth hooks of larvae, 4.5-6 spines of thoracic segment 3 show triangular structure with mainly one or two tips and a broad base, 4.7-8 anal division with six pairs of large papillae (I-VI) and two posterior stigmata of circular structure containing three spiracles.