FIGURE 10. Aphonopelma chalcodes burrow casts. 1 in Neoichnology of tarantulas (Araneae: Theraphosidae): Criteria for recognizing spider burrows in the fossil record

FIGURE 10. Aphonopelma chalcodes burrow casts. 1, Side view of a subvertical tunnel with a series of parallel ridges along the tunnel wall (at arrow) (AC3). 2, Side view of a subvertical tunnel with a vertical entrance shaft and a laterally expanded terminal chamber (AC7). 3, Top view of a subvertical tunnel (AC1). 4-5, Side and top views of a subvertical tunnel with a changing slope along its length (AC8). 6-7, Oblique and side views of a helical burrow with a series of parallel ridges along the tunnel wall (at arrow) and a laterally expanded terminal chamber (AC6).