APPENDIX 1.

Video of Hogna lenta using compaction burrowing technique. Click on image to run movie.

appendix1 

APPENDIX 2.

Video of Hogna lenta depositing silk on compacted sediment and glass of the terrarium. Click on image to run movie.

appendix2 

APPENDIX 3.

Video of Hogna lenta gathering sediment with silk to form a trapdoor. Click on image to run movie.

appendix3 

APPENDIX 4.

Video of Gorgyrella inermis using silk to gather material into a bundle. Click on image to run movie.

appendix4 

APPENDIX 5.

Video of Gorgyrella inermis gathering silken bundle of sediment and removing it from the burrow. Click on image to run movie.

appendix5 

APPENDIX 6.

Video of Gorgyrella inermis depositing silk along the sides of its burrow. Click on image to run movie.

appendix6 

APPENDIX 7.

Quantitative data for the burrows produced by Aphonopelma chalcodes. All measurements in cm. SR = subvertical ramp.

  A1 A2
Architecture SR SR
     
Surface Openings 1 1
     
Maximum depth 9.5 3.1
     
Total Length 17.9 6.1
     
Maximum width 7.6 3.7
Minumum width 3.6 2.9
Mean width 6.6 3.4
     
Maximum height 6.7 2.4
Minimum height 2.5 1.2
Mean height 5.1 1.9
     
Mean W/H ratio 0.77 0.55
     
Maximum circumference 22.2 10.9
Minimum circumference 11.1 7.1
Mean circumference 19.14 9.46
     
Maximum slope 55° 25°
Minimum slope 25°
Mean slope 27.5° 25°
     
Branching angles NA NA
     
Complexity 3 2
     
Tortuosity 0.52 0.98
     

APPENDIX 8.

Bray-Curtis result matrix for Aphonopelma chalcodes. This matrix displays the comparison of burrows produced by Gorgyrella inermis, Hogna lenta, and A. chalcodes . Cells are filled in black where burrows are compared to themselves. Cells with scores of high (1.0-0.8), moderate (0.7-0.6) to low (0.5-0.3) similarity are filled in blue with increasing lightness. See Table 1 and Appendix 7 for architecture key. (PDF only)

APPENDIX 9.

Quantitative data for the burrows produced by Hadrurus arizonensis. All measurements in cm. SR = subvertical ramp, HB = helical burrow, MW = mazework, UB = U-shaped burrow.

  DHS1 DHS2 DHS3 DHS4 DHS5 DHS6 DHS7 DHS8 DHS9 DHS10 DHS11 DHS12 DHS13 DHS14 DHS15 DHS16 DHS17
Architecture SR SR HB MW MW SR HB MW UB SR SR SR SR SR HB SR SR
                                   
Surface Openings 1 1 1 5 4 1 1 3 2 1 1 1 1 1 1 1 1
                                   
Maximum depth 3.9 2.8 7.2 7.4 6.7 4.3 4.6 8.4 8 3 4.2 3.4 4 4.2 16 5.3 6.8
                                   
Total Length 11 9 27 57 46 7 13 31 30 16 11 19 19 23 76 37 26
                                   
Maximum width 4.3 6 7.7 4.6 6.4 5.9 3.3 7.2 4.2 5.2 4.4 6.5 4.9 6.7 5.3 6.2 5.4
Minumum width 3.2 3 2.8 1.9 2.6 2.9 2.7 2.9 3 3.8 4.1 4.2 3.1 4.1 3.7 3.1 4
Mean width 3.9 4.8 4.5 3.6 4.2 4.2 3.1 4.7 3.6 4.4 4.3 5.2 4.1 4.9 4.5 4.8 4.9
                                   
Maximum height 2.8 1.9 3.2 2.3 3.1 1.6 1.4 2.6 2.5 2.1 2 3.3 2.6 2.3 3.3 2.8 2.2
Minimum height 1 1.1 0.8 0.8 1.4 1 0.6 1.4 1.5 1.3 0.9 1.9 1.8 1.4 1.6 1.7 1.5
Mean height 1.9 1.6 2 1.8 1.9 1.4 1 1.9 2.1 1.8 1.6 2.2 2.2 1.7 2.3 2.4 1.8
                                   
Mean W/H ratio 2.1 3 2.3 2 2.2 3 3.1 2.5 1.7 2.4 2.7 2.4 1.9 2.9 2 2 2.7
                                   
Maximum circumference 12.1 14 18 14.5 17 11.5 10.5 16 11.5 13.6 11.2 16.5 13 15.5 14 15 13
Minimum circumference 10 11.2 6.5 9.5 10.5 6 8.5 9.5 10.5 9.7 6.8 11.5 9.9 10.5 10 11 11.5
Mean circumference 11.2 12.7 14.5 13.1 12.2 9.4 9 12.3 11.3 11.9 10 13.9 11.5 12.5 17.3 12.9 12.6
                                   
Maximum slope 40° 10° 30° 50° 90° 30° 40° 50° 90° 10° 40° 10° 20° 20° 30° 20° 20°
Minimum slope
Mean slope 20° 15° 27° 37° 15° 20° 30° 45° 20° 10° 10° 13°
                                   
Branching angles NA NA NA 75° 75° NA NA 70° NA NA NA NA NA NA NA 65° NA
                                   
Complexity 3 3 3 9 9 3 3 7 4 3 3 3 3 3 3 3 3
                                   
Tortuosity 1.1 1.1 9 1.4 1.8 1.1 3.3 1.1 1.3 1.3 1.5 1.1 1.2 1.4 3.3 1.2 1.2

APPENDIX 10.

Bray-Curtis result matrix for Hadrurus arizonensis,Gorgyrella inermis, and Hogna lenta. Formatting is the same as Appendix 8. See Table 1 and Appendix 9 for architecture key. (PDF only)

APPENDIX 11.

Quantitative data for the burrows produced by Mastigoproctus giganteus. All measurements in cm. SR = subvertical ramp, MW = mazework, UB = U-shaped burrow, VS = vertical shaft.

  WS1 WS2 WS3 WS4 WS5 WS6 WS7 WS8 WS9 WS10 WS11 WS12 WS13 WS14 WS15 WS27 WS28 WS32
Architecture UB MW JS SR VS UB JS UB MW JS SR JS SR VS VS SR VS VS
                                     
Surface Openings 2 2 1 1 1 2 1 2 4 1 1 1 1 1 1 1 1 1
                                     
Maximum depth 7.1 10.6 11 5.6 10.1 4.9 10.7 5.7 12.4 12.5 6.6 7.7 6.1 3.4 8.1 3.3 4.9 5.8
                                     
Total Length 29 39.5 18.5 12.5 10.1 16 16 21 66 26.5 8 17.5 8.5 3.8 10.2 4 5.7 6
                                     
Maximum width 7.6 8.1 4.3 3.9 6.3 3 5 4 6.2 6.6 3.1 6.4 3.2 2.2 4.2 2.6 3.3 3.1
Minumum width 4.5 3.4 2.6 3.4 5.3 2.2 2.4 2.9 3.7 2.6 2.8 2.7 2.8 1.9 2.7 1.6 2.2 2.5
Mean width 5.7 5.4 3.6 3.7 5.8 2.4 3.4 3.4 4.6 4.1 3 4.7 3.1 2.1 3.4 2.1 2.7 2.8
                                     
Maximum height 3.2 4.3 2.8 2.1 2.9 1.7 2.3 2 2 2.4 2.9 2.5 2.1 1.1 4.4 1.9 1.9 1.3
Minimum height 2.5 1.5 2 1.7 1.9 1.3 1.7 1.5 1.7 1.2 2.2 1.9 1.8 0.9 1.5 1.1 1.6 1.2
Mean height 2.8 2.9 2.3 1.9 2.2 1.6 2 1.7 1.9 1.9 2.6 2.2 1.9 1 2.6 1.5 1.7 1.3
                                     
Mean W/H ratio 2 1.9 1.6 1.9 2 1.5 1.7 2 2.4 2.2 1.2 2.1 1.6 2.1 1.3 1.4 1.6 2.2
                                     
Maximum circumference 19 26.5 12 11 17 9.5 12.5 11 14.5 16 12 17 10.5 7.5 14.5 8 9.5 8
Minimum circumference 13.5 10 9.5 10 15.5 7.5 8 9.5 9 7.5 11.5 10.5 9 7 8 6.6 7.5 7.5
Mean circumference 15.9 17 10.9 10.5 16.3 8.3 9.9 10.5 11.3 10.8 11.8 13.9 10 7.3 11 7.3 8.3 7.7
                                     
Maximum slope 70° 90° 80° 30° 90° 50° 70 50° 80° 90° 50° 90° 50° 90° 90° 60° 90° 85°
Minimum slope 40° 10° 90° 40° 50° 50° 70 80° 60° 70° 80°
Mean slope 47° 35° 60° 20° 90° 33° 40° 30° 45° 65° 50° 45 50° 80 85° 60° 80° 83°
                                     
Branching angles NA 90° NA NA NA NA NA NA 80° NA NA 90° NA NA NA NA NA NA
                                     
Complexity 4 7 2 2 2 3 3 3 10 3 2 4 2 2 2 2 2 2
                                     
Tortuosity 2.4 1.7 1.2 1.3 1 1.6 1.3 1.4 1.4 1.3 1.1 1.7 1 1 1.2 1 1 1
                                     

APPENDIX 12.

Bray-Curtis result matrix for Mastigoproctus giganteus , Gorgyrella inermis, and Hogna lenta. Formatting is the same as Appendix 8. See Table 1 and Appendix 11 for architecture key. (PDF only)

APPENDIX 13.

Quantitative data for the burrows produced by Narceus americanus. All measurements in cm unless otherwise noted. SV = subvertical burrow, VS = vertical shaft, HB = helical burrow, OS = O-shaped burrow.

  NA32 NA23 NA25A NA21A NA21B NA28 NA29C NA30A NA30C NA33A NA33C NA29B NA21F NA29A NA26B
Architecture SV SV SV SV SV VS VS VS VS VS HB HB HB OS OS
                               
Surface Openings 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
                               
Maximum depth 4.1 6.7 3 1.9 4 2.4 1.9 2.5 2.3 3.1 2.95 3.4 2.9 3.4 6.9
                               
Total Length 4.3 8.2 9.4 2.34 4.3 3 1.9 2.5 2.6 3.1 6.8 10.7 10 10.6 12.5
                               
Maximum width (mm) 0.93 1.69 1.17 1.30 1.45 1.40 1.17 0.93 1.04 1.20 1.18 1.06 1.65 1.29 1.80
Minumum width (mm) 0.85 0.8 0.78 1.05 1.1 1.4 1.17 0.7 0.93 1.04 0.7 0.74 0.68 0.83 0.74
Mean width (mm) 0.88 1.04 1.02 1.18 1.24 1.40 1.17 0.82 0.99 1.12 0.96 0.84 1.16 1.05 1.09
                               
Maximum height (mm) 0.98 0.95 1.01 1.25 1.23 1.38 0.9 0.88 0.93 1.47 1.17 0.92 1.15 0.96 1.13
Minimum height (mm) 0.86 0.73 0.57 1.18 1.05 0.95 0.9 0.77 0.8 1.11 0.85 0.61 0.8 0.6 0.67
Mean height (mm) 0.92 0.83 0.79 1.22 1.14 1.17 0.90 0.83 0.87 1.29 0.98 0.78 0.97 0.82 0.93
                               
Mean W/H ratio 0.96 1.26 1.31 0.96 1.08 1.24 1.30 0.98 1.14 0.89 0.98 1.10 1.21 1.29 1.17
                               
Maximum circumference 3 4.1 3.7 4.2 4.3 5 3.5 2.8 3.1 4.3 4.3 3 4.3 3.5 4.8
Minimum circumference 2.7 2.7 2.5 3.5 3.3 3.7 3.5 2.4 2.8 3.5 2.3 2.5 2.3 2.7 2.3
Mean circumference 2.8 3.1 3.1 3.9 3.7 4.4 3.5 2.6 3.0 3.9 3.1 2.7 3.4 3.1 3.4
                               
Maximum slope 70° 65° 45° 33° 73° 85° 80° 90° 80° 90° 80° 60° 55° 60° 60°
Minimum slope 70° 50° 25° 33° 70° 85° 80° 90° 80° 90° 50° 60° 15° 60°
Mean slope 70° 38.3° 35° 33° 71.5° 85° 80° 90° 80° 90° 65° 75° 25° 37.5° 60°
                               
Branching angles NA NA NA NA NA NA NA NA NA NA NA 90° NA NA NA
                               
Complexity 2 2 2 2 2 2 2 2 2 2 2 4 4 3 3
                               
Tortuosity 1 1.2 1.7 1 1.1 1.3 1 1 1.1 1 2.3 1.5 1.2 43 39
                               

APPENDIX 14.

Bray-Curtis result matrix for Narceus americanus, Gorgyrella inermis, and Hogna lenta. Formatting is the same as Appendix 8. See Table 1 and Appendix 13 for architecture key. (PDF only)