Phylogenetic analyses and description of a new species of black widow spider of the genus Latrodectus Walckenaer (Araneae, Theridiidae) from Mexico; one or more species?
Author
Valdez-Mondragón, Alejandro
05A30CA0-DD93-48CC-BC04-E7042E691FFA
Colección de Aracnología (CARCIB), Programa Académico de Planeación Ambiental y Conservación (PLAYCO), Centro de Investigaciones Biológicas del Noroeste (CIBNOR), S. C. Km 1 Carretera a San Juan de La Costa ́ El Comitán », La Paz, Baja California Sur, C. P. 23205, Mexico
lat_mactans@yahoo.com.mx
Author
Cabrera-Espinosa, Luis A.
F6547011-EA5E-482B-B84C-0CD4596E916A
Colección de Aracnología (CARCIB), Programa Académico de Planeación Ambiental y Conservación (PLAYCO), Centro de Investigaciones Biológicas del Noroeste (CIBNOR), S. C. Km 1 Carretera a San Juan de La Costa ́ El Comitán », La Paz, Baja California Sur, C. P. 23205, Mexico
alejandrocabrera91@gmail.com
text
European Journal of Taxonomy
2023
2023-10-04
897
1
56
https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/2293/9923
journal article
10.5852/ejt.2023.897.2293
6ce49ff3-917a-45e5-964c-7e88d414455b
2118-9773
8405868
A340BD2E-094A-4C84-88B3-5B4ED220F476
Table 5. Average linear measurements (mm) analyzed of female specimens from the putative species of Latrodectus Walckenaer, 1805 in Mexico recorded in this study. Values in parentheses represent minimums and maximums. “ T ” = Length/Width of the Cephalothorax. “TT” = Tibia-Patella length of legs I or IV. | | | Females | | |
|---|
| L. mactans | L. occidentalis sp. nov. | Latrodectus sp. 1 | Latrodectus sp. 2 | L. hesperus |
|---|
| Carapace length | 4.11 (3.8–4.45) | 4.03 (3.68–4.5) | 3.56–3.96 | 4.18 (3.81–4.87) | 4.04 (3.43–4.56) |
|---|
| Carapace width | 3.53 (3.16–3.76) | 3.6 (3.2–3.95) | 3.062–3.36 | 3.76 (3.2–4.55) | 3.56 (2.96–4.2) |
|---|
| T coefficient | 1.13 (1.1–1.67) | 1.11 (0.98–1.22) | 1.162–1.178 | 1.09 (0.98–1.22) | 1.13 (1.01–1.22) |
|---|
| Sternum length | 2.15 (2.07–2.31) | 2.22 (2.02–2.4) | 1.84–2 | 2.21 (1.9–2.5) | 2.18 (1.77–2.5) |
|---|
| Sternum width | 1.94 (1.82–2.02) | 1.87 (1.7–2.12) | 1.62–1.82 | 1.96 (1.7–2.32) | 1.88 (1.6–2.3) |
|---|
| Sternum coefficient | 1.13 (1.06–1.21) | 1.18 (1.1–1.3) | 1.136–1.099 | 1.11 (1.03–1.19) | 1.15 (1.07–1.29) |
|---|
| Tibia-Patella I length | 7.08 (6.56–7.8) | 7.96 (6.4–9.1) | 6.96–6.88 | 7.06 (6.06–8.4) | 7.56 (6.48–8.7) |
|---|
| Tibia-Patella I width | 0.72 (0.68–0.76) | 0.68 (0.64–0.75) | 0.675–0.725 | 0.68 (0.6–0.76) | 0.69 (0.6–0.8) |
|---|
| Tibia-Patella I coefficient | 10.01 (9.37–10.54) | 11.67 (10.16–12.71) | 10.311–9.49 | 9.82 (9.04–10.23) | 10.88 (9.77–12) |
|---|
| Femur I length | 6.49 (5.68–7.04) | 7.74 (6.24–9.1) | 6.4–6.48 | 6.22 (5.81–6.88) | 7.09 (6.08–8.1) |
|---|
| Femur I width | 0.85 (0.78–0.9) | 0.81 (0.76–0.86) | 0.8–0.838 | 0.9 (0.76–1.06) | 0.87 (0.74–1.02) |
|---|
| Femur I coefficient | 7.7 (7.52–8) | 9.79 (8.85–11.06) | 7.642–8.1 | 6.87 (6.36–7.64) | 8.06 (7.51–8.86) |
|---|
| TT1 coefficient | 1.69 (1.65–1.73) | 2 (1.56–2.36) | 1.737–1.955 | 1.71 (1.51–2) | 1.85 (1.63–1.97) |
|---|
| Tibia–Patella IV length | 6.12 (6–6.32) | 6.63 (6.06–7.2) | 5.75–5.875 | 6.14 (5.31–7.04) | 6.41 (5.12–7.52) |
|---|
| Tibia–Patella IV width | 0.82 (0.74–0.9) | 0.81 (0.64–0.96) | 0.75–0.875 | 0.82 (0.74–0.96) | 0.82 (0.64–0.98) |
|---|
| Tibia–Patella IV coefficient | 7.41 (7.02–7.77) | 8.16 (7.44–9.35) | 7.581–7.667 | 7.49 (6.78–8.63) | 7.9 (7.5–8.38) |
|---|
| Femur IV length | 6.06 (5.75–6.32) | 6.83 (5.44–7.9) | 5.875–5.938 | 6.14 (5.43–7.44) | 6.59 (5.6–7.6) |
|---|
| Femur IV with | 0.82 (0.74–0.88) | 0.81 (0.64–0.96) | 0.762–0.812 | 0.87 (0.74–1.04) | 0.85 (0.7–1) |
|---|
| Femur IV coefficient | 7.51 (7.09–7.93) | 8.45 (7.52–9.37) | 7.231–7.787 | 6.79 (6.38–7.34) | 7.66 (6.76–8.47) |
|---|
| TT4 coefficient | 1.47 (1.42–1.59) | 1.66 (1.47–1.95) | 1.484–1.615 | 1.49 (1.3–1.68) | 1.61 (1.49–1.7) |
|---|
| Angle of the spermathecae | 25.67 (18.88–34.83) | 32.99 (18.86–44.19) | 44.036–46.79 | 31.93 (26.61–38.20) | 30.2 (20.4–38.08) |
|---|
| Genital opening length | 0.207 (0.2–0.21) | 0.25 (0.2–0.31) | 0.232–0.233 | 0.25 (0.21–0.28) | 0.22 (0.19–0.28) |
|---|
| Genital opening width | 0.63 (0.53–0.70) | 0.73 (0.64–0.85) | 0.614–0.615 | 0.67 (0.65–0.69) | 0.64 (0.59–0.71) |
|---|
| Genital opening coefficient | 0.33 (0.28–0.4) | 0.35 (0.26–0.43) | 0.377–0.379 | 0.37 (0.31–0.41) | 0.33 (0.3–0.36) |
|---|