FIGURE 9. Pelinobius muticus burrow casts. 1-3 in Neoichnology of tarantulas (Araneae: Theraphosidae): Criteria for recognizing spider burrows in the fossil record

FIGURE 9. Pelinobius muticus burrow casts. 1-3, Side views of vertical, sinuous burrows with a laterally expanded terminal chamber (PM6, PM1, PM3, respectively). 4-5, Oblique and side views of a large diameter, vertical sinuous burrow ending with a horizontal tunnel (PM5). 6-7, Side and top views of a vertical burrow terminating in a horizontal tunnel (PM4). The burrow ends with two bifurcating tunnels. 8, Vertical, branching burrow (PM2). 9-10, Oblique and side view of a vertical, sinuous burrow with two branching tunnels (PM7).