Variation for selected characters of morphologically similar species of Amerotyphlops from Brazil. Values displayed in the table represent (in this sequence) range (mm), mean, standard deviations and available sample size.
| Character . | Sex . | A. arenensis . | A. brongersmianus . | A. martis . | A. montanum . | A. caetanoi . | A. illusorium . |
|---|---|---|---|---|---|---|---|
| ED | ♂ | 0.9 ± 0.13 (0.61–1.05) 12 | 0.99 ± 0.27 (0.40–1.69) 39 | 0.76 ± 0.21 (0.63–1.16) 4 | 1.03 ± na (1.02) 1 | - | 0.72 ± 0.01 (0.71–0.72) 2 |
| ♀ | 0.94 ± 0.14 (0.78–1.21) 9 | 1.03 ± 0.26 (0.61–1.72) 63 | - | - | 0.56 ± na (0.56) 1 | 0.77 ± na (0.77) 1 | |
| HR | ♂ | 2.98 ± 0.13 (2.73–3.13) 12 | 3.56 ± 0.55 (2.77–4.78) 39 | 2.30 ± 0.17 (2.61–3.05) 4 | 3.88 ± na (3.88) 1 | - | 3.03 ± 0.57 (2.63–3.43) 2 |
| ♀ | 3.24 ± 0.18 (2.97–3.50) 9 | 3.80 ± 0.56 (2.87–5.39) 63 | - | - | 2.86 ± na (2.86) 1 | 3.78 ± na (3.78) 1 | |
| HWE | ♂ | 5.04 ± 0.41 (4.37–5.54) 12 | 5.75 ± 0.99 (4.10–8.17) 39 | 3.24 ± 0.12 (3.84–4.10) 4 | 6.64 ± na (6.64) 1 | - | 4.66 ± 0.65 (4.20–5.12) 2 |
| ♀ | 5.52 ± 0.43 (4.80–6.06) 9 | 6.12 ± 1.02 (4.45–8.62) 63 | - | - | 4.44 ± na (4.44) 1 | 5.75 ± na (5.75) 1 | |
| IN | ♂ | 2.41 ± 0.19 (2.08–2.65) 12 | 2.77 ± 0.45 (1.84–3.59) 39 | 1.68 ± 0.13 (1.89–2.22) 4 | 2.63 ± na (2.63) 1 | - | 2.32 ± 0.18 (2.19–2.45) 2 |
| ♀ | 2.63 ± 0.22 (2.35–3.00) 9 | 2.92 ± 0.45 (2.16–4.14) 63 | - | - | 2.16 ± na (2.16) 1 | 2.82 ± na (2.82) 1 | |
| INORB | ♂ | 3.25 ± 0.17 (2.87–3.45) 12 | 3.55 ± 0.6 (2.73–4.97) 39 | 2.08 ± 0.17 (2.31–2.68) 4 | 4.09 ± na (4.09) 1 | - | 3.00 ± 0.57 (2.60–3.40) 2 |
| ♀ | 3.45 ± 0.25 (3.00–3.83) 9 | 3.68 ± 0.57 (2.72–5.11) 63 | - | - | 2.90 ± na (2.90) 1 | 3.90 ± na (3.9) 1 | |
| RL | ♂ | 2.76 ± 0.23 (2.26–3.09) 12 | 3.22 ± 0.54 (2.27–4.37) 39 | 1.95 ± 0.19 (2.23–2.66) 4 | 3.15 ± na (3.15) 1 | - | 2.61 ± 0.25 (2.44–2.79) 2 |
| ♀ | 3.11 ± 0.26 (2.71–3.54) 9 | 3.37 ± 0.53 (2.47–4.80) 63 | - | - | 2.51 ± na (2.51) 1 | 3.12 ± na (3.12) 1 | |
| RW1 | ♂ | 1.63 ± 0.09 (1.44–1.77) 12 | 1.76 ± 0.27 (1.27–2.37) 39 | 1.12 ± 0.09 (1.23–1.44) 4 | 1.88 ± na (1.88) 1 | - | 1.33 ± 0.16 (1.22–1.44) 2 |
| ♀ | 1.77 ± 0.18 (1.56–2.13) 9 | 1.89 ± 0.30 (1.34–1.2.70) 63 | - | - | 1.29 ± na (1.29) 1 | 1.54 ± na (1.54) 1 | |
| MBD | ♂ | 6.82 ± 1.11 (4.81–7.86) 12 | 8.14 ± 1.99 (5.03–14.47) 39 | 3.83 ± 0.44 (4.09–5.13) 4 | 7.12 ± na (7.12) 1 | - | 5.01 ± 0.14 (4.92–5.11) 2 |
| ♀ | 8.03 ± 1.03 (5.93–8.98) 9 | 8.87 ± 2.15 (5.82–14.76) 63 | - | - | 6.21 ± na (6.21) 1 | 8.29 ± na (8.29) 1 | |
| INORB/HWE | ♂ | 0.65 ± 0.03 (0.61–0.71) 12 | 0.62 ± 0.04 (0.55–0.71) 39 | 0.51 ± 0.02 (0.60–0.66) 4 | 0.72 ± na (0.72) 1 | - | 0.64 ± 0.03 (0.62–0.66) 2 |
| ♀ | 0.62 ± 0.02 (0.58–0.66) 9 | 0.60 ± 0.04 (0.53–0.69) 63 | - | - | 0.66 ± na (0.66) 1 | 0.68 ± na (0.68) 1 | |
| NE/HWE | ♂ | 0.41 ± 0.02 (0.38–0.44) 12 | 0.38 ± 0.02 (0.35–0.41) 39 | 0.33 ± 0.04 (0.36–0.46) 4 | 0.49 ± na (0.49) 1 | - | 0.39 ± 0.01 (0.39–0.40) 2 |
| ♀ | 0.41 ± 0.02 (0.39–0.44) 9 | 0.39 ± 0.03 (0.33–0.47) 63 | - | - | 0.39 ± na (0.39) 1 | 0.42 ± na (0.42) 1 |
| Character . | Sex . | A. arenensis . | A. brongersmianus . | A. martis . | A. montanum . | A. caetanoi . | A. illusorium . |
|---|---|---|---|---|---|---|---|
| ED | ♂ | 0.9 ± 0.13 (0.61–1.05) 12 | 0.99 ± 0.27 (0.40–1.69) 39 | 0.76 ± 0.21 (0.63–1.16) 4 | 1.03 ± na (1.02) 1 | - | 0.72 ± 0.01 (0.71–0.72) 2 |
| ♀ | 0.94 ± 0.14 (0.78–1.21) 9 | 1.03 ± 0.26 (0.61–1.72) 63 | - | - | 0.56 ± na (0.56) 1 | 0.77 ± na (0.77) 1 | |
| HR | ♂ | 2.98 ± 0.13 (2.73–3.13) 12 | 3.56 ± 0.55 (2.77–4.78) 39 | 2.30 ± 0.17 (2.61–3.05) 4 | 3.88 ± na (3.88) 1 | - | 3.03 ± 0.57 (2.63–3.43) 2 |
| ♀ | 3.24 ± 0.18 (2.97–3.50) 9 | 3.80 ± 0.56 (2.87–5.39) 63 | - | - | 2.86 ± na (2.86) 1 | 3.78 ± na (3.78) 1 | |
| HWE | ♂ | 5.04 ± 0.41 (4.37–5.54) 12 | 5.75 ± 0.99 (4.10–8.17) 39 | 3.24 ± 0.12 (3.84–4.10) 4 | 6.64 ± na (6.64) 1 | - | 4.66 ± 0.65 (4.20–5.12) 2 |
| ♀ | 5.52 ± 0.43 (4.80–6.06) 9 | 6.12 ± 1.02 (4.45–8.62) 63 | - | - | 4.44 ± na (4.44) 1 | 5.75 ± na (5.75) 1 | |
| IN | ♂ | 2.41 ± 0.19 (2.08–2.65) 12 | 2.77 ± 0.45 (1.84–3.59) 39 | 1.68 ± 0.13 (1.89–2.22) 4 | 2.63 ± na (2.63) 1 | - | 2.32 ± 0.18 (2.19–2.45) 2 |
| ♀ | 2.63 ± 0.22 (2.35–3.00) 9 | 2.92 ± 0.45 (2.16–4.14) 63 | - | - | 2.16 ± na (2.16) 1 | 2.82 ± na (2.82) 1 | |
| INORB | ♂ | 3.25 ± 0.17 (2.87–3.45) 12 | 3.55 ± 0.6 (2.73–4.97) 39 | 2.08 ± 0.17 (2.31–2.68) 4 | 4.09 ± na (4.09) 1 | - | 3.00 ± 0.57 (2.60–3.40) 2 |
| ♀ | 3.45 ± 0.25 (3.00–3.83) 9 | 3.68 ± 0.57 (2.72–5.11) 63 | - | - | 2.90 ± na (2.90) 1 | 3.90 ± na (3.9) 1 | |
| RL | ♂ | 2.76 ± 0.23 (2.26–3.09) 12 | 3.22 ± 0.54 (2.27–4.37) 39 | 1.95 ± 0.19 (2.23–2.66) 4 | 3.15 ± na (3.15) 1 | - | 2.61 ± 0.25 (2.44–2.79) 2 |
| ♀ | 3.11 ± 0.26 (2.71–3.54) 9 | 3.37 ± 0.53 (2.47–4.80) 63 | - | - | 2.51 ± na (2.51) 1 | 3.12 ± na (3.12) 1 | |
| RW1 | ♂ | 1.63 ± 0.09 (1.44–1.77) 12 | 1.76 ± 0.27 (1.27–2.37) 39 | 1.12 ± 0.09 (1.23–1.44) 4 | 1.88 ± na (1.88) 1 | - | 1.33 ± 0.16 (1.22–1.44) 2 |
| ♀ | 1.77 ± 0.18 (1.56–2.13) 9 | 1.89 ± 0.30 (1.34–1.2.70) 63 | - | - | 1.29 ± na (1.29) 1 | 1.54 ± na (1.54) 1 | |
| MBD | ♂ | 6.82 ± 1.11 (4.81–7.86) 12 | 8.14 ± 1.99 (5.03–14.47) 39 | 3.83 ± 0.44 (4.09–5.13) 4 | 7.12 ± na (7.12) 1 | - | 5.01 ± 0.14 (4.92–5.11) 2 |
| ♀ | 8.03 ± 1.03 (5.93–8.98) 9 | 8.87 ± 2.15 (5.82–14.76) 63 | - | - | 6.21 ± na (6.21) 1 | 8.29 ± na (8.29) 1 | |
| INORB/HWE | ♂ | 0.65 ± 0.03 (0.61–0.71) 12 | 0.62 ± 0.04 (0.55–0.71) 39 | 0.51 ± 0.02 (0.60–0.66) 4 | 0.72 ± na (0.72) 1 | - | 0.64 ± 0.03 (0.62–0.66) 2 |
| ♀ | 0.62 ± 0.02 (0.58–0.66) 9 | 0.60 ± 0.04 (0.53–0.69) 63 | - | - | 0.66 ± na (0.66) 1 | 0.68 ± na (0.68) 1 | |
| NE/HWE | ♂ | 0.41 ± 0.02 (0.38–0.44) 12 | 0.38 ± 0.02 (0.35–0.41) 39 | 0.33 ± 0.04 (0.36–0.46) 4 | 0.49 ± na (0.49) 1 | - | 0.39 ± 0.01 (0.39–0.40) 2 |
| ♀ | 0.41 ± 0.02 (0.39–0.44) 9 | 0.39 ± 0.03 (0.33–0.47) 63 | - | - | 0.39 ± na (0.39) 1 | 0.42 ± na (0.42) 1 |
Abbreviations: ED, eye diameter; HR, head radius; HWE, head width; IN, internasal distance; INORB, interorbital distance; RL, rostral length; RW1, rostral width; MBD, midbody diameter.
Variation for selected characters of morphologically similar species of Amerotyphlops from Brazil. Values displayed in the table represent (in this sequence) range (mm), mean, standard deviations and available sample size.
| Character . | Sex . | A. arenensis . | A. brongersmianus . | A. martis . | A. montanum . | A. caetanoi . | A. illusorium . |
|---|---|---|---|---|---|---|---|
| ED | ♂ | 0.9 ± 0.13 (0.61–1.05) 12 | 0.99 ± 0.27 (0.40–1.69) 39 | 0.76 ± 0.21 (0.63–1.16) 4 | 1.03 ± na (1.02) 1 | - | 0.72 ± 0.01 (0.71–0.72) 2 |
| ♀ | 0.94 ± 0.14 (0.78–1.21) 9 | 1.03 ± 0.26 (0.61–1.72) 63 | - | - | 0.56 ± na (0.56) 1 | 0.77 ± na (0.77) 1 | |
| HR | ♂ | 2.98 ± 0.13 (2.73–3.13) 12 | 3.56 ± 0.55 (2.77–4.78) 39 | 2.30 ± 0.17 (2.61–3.05) 4 | 3.88 ± na (3.88) 1 | - | 3.03 ± 0.57 (2.63–3.43) 2 |
| ♀ | 3.24 ± 0.18 (2.97–3.50) 9 | 3.80 ± 0.56 (2.87–5.39) 63 | - | - | 2.86 ± na (2.86) 1 | 3.78 ± na (3.78) 1 | |
| HWE | ♂ | 5.04 ± 0.41 (4.37–5.54) 12 | 5.75 ± 0.99 (4.10–8.17) 39 | 3.24 ± 0.12 (3.84–4.10) 4 | 6.64 ± na (6.64) 1 | - | 4.66 ± 0.65 (4.20–5.12) 2 |
| ♀ | 5.52 ± 0.43 (4.80–6.06) 9 | 6.12 ± 1.02 (4.45–8.62) 63 | - | - | 4.44 ± na (4.44) 1 | 5.75 ± na (5.75) 1 | |
| IN | ♂ | 2.41 ± 0.19 (2.08–2.65) 12 | 2.77 ± 0.45 (1.84–3.59) 39 | 1.68 ± 0.13 (1.89–2.22) 4 | 2.63 ± na (2.63) 1 | - | 2.32 ± 0.18 (2.19–2.45) 2 |
| ♀ | 2.63 ± 0.22 (2.35–3.00) 9 | 2.92 ± 0.45 (2.16–4.14) 63 | - | - | 2.16 ± na (2.16) 1 | 2.82 ± na (2.82) 1 | |
| INORB | ♂ | 3.25 ± 0.17 (2.87–3.45) 12 | 3.55 ± 0.6 (2.73–4.97) 39 | 2.08 ± 0.17 (2.31–2.68) 4 | 4.09 ± na (4.09) 1 | - | 3.00 ± 0.57 (2.60–3.40) 2 |
| ♀ | 3.45 ± 0.25 (3.00–3.83) 9 | 3.68 ± 0.57 (2.72–5.11) 63 | - | - | 2.90 ± na (2.90) 1 | 3.90 ± na (3.9) 1 | |
| RL | ♂ | 2.76 ± 0.23 (2.26–3.09) 12 | 3.22 ± 0.54 (2.27–4.37) 39 | 1.95 ± 0.19 (2.23–2.66) 4 | 3.15 ± na (3.15) 1 | - | 2.61 ± 0.25 (2.44–2.79) 2 |
| ♀ | 3.11 ± 0.26 (2.71–3.54) 9 | 3.37 ± 0.53 (2.47–4.80) 63 | - | - | 2.51 ± na (2.51) 1 | 3.12 ± na (3.12) 1 | |
| RW1 | ♂ | 1.63 ± 0.09 (1.44–1.77) 12 | 1.76 ± 0.27 (1.27–2.37) 39 | 1.12 ± 0.09 (1.23–1.44) 4 | 1.88 ± na (1.88) 1 | - | 1.33 ± 0.16 (1.22–1.44) 2 |
| ♀ | 1.77 ± 0.18 (1.56–2.13) 9 | 1.89 ± 0.30 (1.34–1.2.70) 63 | - | - | 1.29 ± na (1.29) 1 | 1.54 ± na (1.54) 1 | |
| MBD | ♂ | 6.82 ± 1.11 (4.81–7.86) 12 | 8.14 ± 1.99 (5.03–14.47) 39 | 3.83 ± 0.44 (4.09–5.13) 4 | 7.12 ± na (7.12) 1 | - | 5.01 ± 0.14 (4.92–5.11) 2 |
| ♀ | 8.03 ± 1.03 (5.93–8.98) 9 | 8.87 ± 2.15 (5.82–14.76) 63 | - | - | 6.21 ± na (6.21) 1 | 8.29 ± na (8.29) 1 | |
| INORB/HWE | ♂ | 0.65 ± 0.03 (0.61–0.71) 12 | 0.62 ± 0.04 (0.55–0.71) 39 | 0.51 ± 0.02 (0.60–0.66) 4 | 0.72 ± na (0.72) 1 | - | 0.64 ± 0.03 (0.62–0.66) 2 |
| ♀ | 0.62 ± 0.02 (0.58–0.66) 9 | 0.60 ± 0.04 (0.53–0.69) 63 | - | - | 0.66 ± na (0.66) 1 | 0.68 ± na (0.68) 1 | |
| NE/HWE | ♂ | 0.41 ± 0.02 (0.38–0.44) 12 | 0.38 ± 0.02 (0.35–0.41) 39 | 0.33 ± 0.04 (0.36–0.46) 4 | 0.49 ± na (0.49) 1 | - | 0.39 ± 0.01 (0.39–0.40) 2 |
| ♀ | 0.41 ± 0.02 (0.39–0.44) 9 | 0.39 ± 0.03 (0.33–0.47) 63 | - | - | 0.39 ± na (0.39) 1 | 0.42 ± na (0.42) 1 |
| Character . | Sex . | A. arenensis . | A. brongersmianus . | A. martis . | A. montanum . | A. caetanoi . | A. illusorium . |
|---|---|---|---|---|---|---|---|
| ED | ♂ | 0.9 ± 0.13 (0.61–1.05) 12 | 0.99 ± 0.27 (0.40–1.69) 39 | 0.76 ± 0.21 (0.63–1.16) 4 | 1.03 ± na (1.02) 1 | - | 0.72 ± 0.01 (0.71–0.72) 2 |
| ♀ | 0.94 ± 0.14 (0.78–1.21) 9 | 1.03 ± 0.26 (0.61–1.72) 63 | - | - | 0.56 ± na (0.56) 1 | 0.77 ± na (0.77) 1 | |
| HR | ♂ | 2.98 ± 0.13 (2.73–3.13) 12 | 3.56 ± 0.55 (2.77–4.78) 39 | 2.30 ± 0.17 (2.61–3.05) 4 | 3.88 ± na (3.88) 1 | - | 3.03 ± 0.57 (2.63–3.43) 2 |
| ♀ | 3.24 ± 0.18 (2.97–3.50) 9 | 3.80 ± 0.56 (2.87–5.39) 63 | - | - | 2.86 ± na (2.86) 1 | 3.78 ± na (3.78) 1 | |
| HWE | ♂ | 5.04 ± 0.41 (4.37–5.54) 12 | 5.75 ± 0.99 (4.10–8.17) 39 | 3.24 ± 0.12 (3.84–4.10) 4 | 6.64 ± na (6.64) 1 | - | 4.66 ± 0.65 (4.20–5.12) 2 |
| ♀ | 5.52 ± 0.43 (4.80–6.06) 9 | 6.12 ± 1.02 (4.45–8.62) 63 | - | - | 4.44 ± na (4.44) 1 | 5.75 ± na (5.75) 1 | |
| IN | ♂ | 2.41 ± 0.19 (2.08–2.65) 12 | 2.77 ± 0.45 (1.84–3.59) 39 | 1.68 ± 0.13 (1.89–2.22) 4 | 2.63 ± na (2.63) 1 | - | 2.32 ± 0.18 (2.19–2.45) 2 |
| ♀ | 2.63 ± 0.22 (2.35–3.00) 9 | 2.92 ± 0.45 (2.16–4.14) 63 | - | - | 2.16 ± na (2.16) 1 | 2.82 ± na (2.82) 1 | |
| INORB | ♂ | 3.25 ± 0.17 (2.87–3.45) 12 | 3.55 ± 0.6 (2.73–4.97) 39 | 2.08 ± 0.17 (2.31–2.68) 4 | 4.09 ± na (4.09) 1 | - | 3.00 ± 0.57 (2.60–3.40) 2 |
| ♀ | 3.45 ± 0.25 (3.00–3.83) 9 | 3.68 ± 0.57 (2.72–5.11) 63 | - | - | 2.90 ± na (2.90) 1 | 3.90 ± na (3.9) 1 | |
| RL | ♂ | 2.76 ± 0.23 (2.26–3.09) 12 | 3.22 ± 0.54 (2.27–4.37) 39 | 1.95 ± 0.19 (2.23–2.66) 4 | 3.15 ± na (3.15) 1 | - | 2.61 ± 0.25 (2.44–2.79) 2 |
| ♀ | 3.11 ± 0.26 (2.71–3.54) 9 | 3.37 ± 0.53 (2.47–4.80) 63 | - | - | 2.51 ± na (2.51) 1 | 3.12 ± na (3.12) 1 | |
| RW1 | ♂ | 1.63 ± 0.09 (1.44–1.77) 12 | 1.76 ± 0.27 (1.27–2.37) 39 | 1.12 ± 0.09 (1.23–1.44) 4 | 1.88 ± na (1.88) 1 | - | 1.33 ± 0.16 (1.22–1.44) 2 |
| ♀ | 1.77 ± 0.18 (1.56–2.13) 9 | 1.89 ± 0.30 (1.34–1.2.70) 63 | - | - | 1.29 ± na (1.29) 1 | 1.54 ± na (1.54) 1 | |
| MBD | ♂ | 6.82 ± 1.11 (4.81–7.86) 12 | 8.14 ± 1.99 (5.03–14.47) 39 | 3.83 ± 0.44 (4.09–5.13) 4 | 7.12 ± na (7.12) 1 | - | 5.01 ± 0.14 (4.92–5.11) 2 |
| ♀ | 8.03 ± 1.03 (5.93–8.98) 9 | 8.87 ± 2.15 (5.82–14.76) 63 | - | - | 6.21 ± na (6.21) 1 | 8.29 ± na (8.29) 1 | |
| INORB/HWE | ♂ | 0.65 ± 0.03 (0.61–0.71) 12 | 0.62 ± 0.04 (0.55–0.71) 39 | 0.51 ± 0.02 (0.60–0.66) 4 | 0.72 ± na (0.72) 1 | - | 0.64 ± 0.03 (0.62–0.66) 2 |
| ♀ | 0.62 ± 0.02 (0.58–0.66) 9 | 0.60 ± 0.04 (0.53–0.69) 63 | - | - | 0.66 ± na (0.66) 1 | 0.68 ± na (0.68) 1 | |
| NE/HWE | ♂ | 0.41 ± 0.02 (0.38–0.44) 12 | 0.38 ± 0.02 (0.35–0.41) 39 | 0.33 ± 0.04 (0.36–0.46) 4 | 0.49 ± na (0.49) 1 | - | 0.39 ± 0.01 (0.39–0.40) 2 |
| ♀ | 0.41 ± 0.02 (0.39–0.44) 9 | 0.39 ± 0.03 (0.33–0.47) 63 | - | - | 0.39 ± na (0.39) 1 | 0.42 ± na (0.42) 1 |
Abbreviations: ED, eye diameter; HR, head radius; HWE, head width; IN, internasal distance; INORB, interorbital distance; RL, rostral length; RW1, rostral width; MBD, midbody diameter.
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