TABLE 1. Terrestrial arthropod species studied in these experiments, range of lengths of the specimens, the geographic locations and environments that the species inhabit, and the experimental parameters used for each species including terrarium size (in liters), sediment content, and sediment moisture. Sediment components include organic matter (OM), clay (CL), and sand (SA).
| Species | Type | Length (cm) | Location | Environment | Terrarium Size (L) | Sediment | Moisture (%) |
| Scolopendra viridis | Centipede | 5–8 | North America | Temperate forest | 38, 76 | OM, CL, SA | 50 |
| Scolopendra polymorpha | Centipede | 6–8 | North America | Semi-arid desert | 55, 85 | OM, CL, SA | 20 |
| Hemiscolopendra marginata | Centipede | 5–7 | North America | Temperate forest | 55, 85 | OM, CL, SA | 60 |
| Hadrurus arizonensis | Scorpion | 10–13 | North America | Semi-arid desert | 38, 76, 212 | CL, SA | 20 |
| Smeringurus mesaensis | Scorpion | 5–10 | North America | Semi-arid desert | 38, 76 | CL, SA | 20 |
| Uroctonus mordax | Scorpion | 5–10 | North America | Temperate forest | 38, 76 | OM, CL | 35 |
| Heterometrus spinifer | Scorpion | 10–14 | Asia | Tropical forest | 38, 76, 212 | OM, CL | 50 |
| Pandinus imperator | Scorpion | 11–16 | Africa | Tropical forest | 38, 76, 212 | OM, CL, SA | 50 |
| Mastigoproctus giganteus | Whip scorpion | 3–8 | North America | Semi-arid desert | 19, 38, 76, 212 | OM, CL, SA | 45 |
| Hogna lenta | Spider | 2–3 | North America | Temperate forest | 38, 76 | OM, CL | 35 |
| Gorgyrella inermis | Spider | 3–5 | Africa | Semi-arid grassland | 76, 114 | OM, CL, SA | 55 |
| Myrmekiaphilia sp. | Spider | 0.3–0.8 | North America | Temperate forest | 38, 76 | OM, CL | 35 |
| Aphonopelma chalcodes | Spider | 6–7 | North America | Semi-arid desert | 114, 212, 246 | CL, SA | 20 |
| Hysterocrates gigas | Spider | 6–8 | Africa | Subtropical forest | 114, 212, 246 | OM, CL | 60 |
| Pelinobius muticus | Spider | 2–4 | Africa | Subtropical grassland | 114, 212, 246 | OM, CL | 40 |
TABLE 2. The number of burrow casts collected for each studied arthropod species and the number and type of architectures produced. VS = vertical shaft, JB = J-shaped burrow, UB = U-shaped burrow, YB = Y-shaped burrow, ST = subhorizontal tunnel, HB = helical burrow, BB = branched burrow, MW = mazework.
| Species | Type | # Casts | # Architectures | Architectures |
| Scolopendra viridis | Centipede | 14 | 2 | VS, UB |
| Scolopendra polymorpha | Centipede | 29 | 6 | VS, ST, JB, UB, BB, MW |
| Hemiscolopendra marginata | Centipede | 98 | 7 | VS, ST, JB, UB, YB, BB, MW |
| Hadrurus arizonensis | Scorpion | 17 | 4 | ST, HB, UB, MW |
| Smeringurus mesaensis | Scorpion | 8 | 1 | ST |
| Uroctonus mordax | Scorpion | 6 | 1 | ST |
| Heterometrus spinifer | Scorpion | 6 | 2 | ST, HB |
| Pandinus imperator | Scorpion | 15 | 3 | ST, HB, BB |
| Mastigoproctus giganteus | Whip scorpion | 42 | 6 | VS, JB, UB, YB, BB, MW |
| Hogna lenta | Spider | 19 | 2 | VS, YB |
| Gorgyrella inermis | Spider | 27 | 2 | VS, JB |
| Myrmekiaphilia sp. | Spider | 5 | 3 | VS, ST, BB |
| Aphonopelma chalcodes | Spider | 10 | 2 | ST, HB |
| Hysterocrates gigas | Spider | 9 | 2 | VS, BB |
| Pelinobius muticus | Spider | 8 | 2 | VS, BB |
