Geographical variation of prementum size in Iberian Cordulegaster boltonii (Odonata: Cordulegastridae) populations Author Hernández, M. Ángeles Departamento de Biología Ambiental, Facultad de Ciencias, Universidad de Navarra, mahermin@unav.es Author Casanueva, Patricia Departamento de Ciencias Experimentales, Universidad Europea Miguel de Cervantes, Author Nunes, Luisa Instituto Politécnico de Castelo Branco - Escola Superior Agrária. Qta Sra Mercules, & Centre for Applied Ecology Prof. Baeta Neves (CEABN-InBIO), School of Agriculture, University of Lisbon, Tapada da Ajuda, Lisbon, 1349 - 017, Portugal Author Santamaría, Tomás Universidad Católica de Ávila, Calle Canteros s / n, 05005 Ávila, Spain Author Sánchez-Sastre, Luis Fernando Área de Ingeniería Cartográfica, Departamento CMeIM / EGI / ICGF / IM / IPF, EIFAB, Universidad de Valladolid, 42004 Soria, Spain Author Ferreras-Romero, Manuel Departamento de Sistemas Físicos, Químicos y Naturales, Universidad Pablo de Olavide, A- 376 km 1, Author Campos, Francisco Departamento de Ciencias Experimentales, Universidad Europea Miguel de Cervantes, text International Journal of Odonatology 2022 2022-03-14 25 56 61 https://doi.org/10.48156/1388.2022.1917169 journal article 10.48156/1388.2022.1917169 2159-6719 15576131

Table 2. Sample sizes (N) and mean values ± SD (mm) of four measurements in male and female exuviae of Cordulegaster boltonii from 18 Iberian populations analysed. He: head width. ML, W+, W-: maximum length, maximum width, and minimum width of the prementum. N: sample size.

			Males					Females
River	N	He	ML	W-	W+	N	He	ML	W-	W+
1. Cova	14	8.06±0.19	6.78±0.24	2.54±0.08	6.68±0.19	13	8.63±0.24	7.27±0.18	2.70±0.07	7.18±0.26
2. Sabor	35	7.86±0.17	6.39±0.20	2.40±0.09	6.34±0.19	37	8.45±0.19	6.93±0.20	2.60±0.06	6.88±0.21
3. Eria	20	7.78±0.28	6.59±0.20	2.35±0.06	6.24±0.20	21	8.45±0.17	7.10±0.19	2.59±0.09	6.79±0.14
4. Curueño	27	7.93±0.15	6.32±0.21	2.37±0.09	6.21±0.16	33	8.49±0.18	6.85±0.27	2.59±0.08	6.80±0.20
5. Lazán	42	7.75±0.19	6.17±0.17	2.32±0.09	6.06±0.16	40	8.36±0.20	6.70±0.19	2.55±0.08	6.58±0.19
6. Sedanillo	31	7.97±0.21	6.60±0.18	2.46±0.06	6.30±0.16	40	8.48±0.26	7.09±0.26	2.67±0.10	6.84±0.20
7. Arlanzón	50	7.96±0.35	6.46±0.27	2.39±0.12	6.33±0.30	26	8.27±0.20	6.72±0.16	2.51±0.09	6.60±0.18
8. Zêzere	14	7.93±0.20	6.71±0.18	2.42±0.07	6.36±0.14	21	8.66±0.23	7.38±0.24	2.68±0.09	7.06±0.24
9. Frío	34	7.99±0.28	6.67±0.29	2.43±0.10	6.47±0.26	53	8.59±0.24	7.24±0.26	2.71±0.18	7.10±0.26
10. Francia	55	7.88±0.22	6.48±0.27	2.41±0.08	6.40±0.21	55	8.53±0.24	7.12±0.27	2.63±0.11	7.01±0.27
11. Barbellido	58	7.97±0.16	6.42±0.15	2.37±0.06	6.42±0.15	50	8.63±0.18	6.99±0.21	2.61±0.09	7.00±0.20
12. Gama	29	7.91±0.28	6.59±0.18	2.34±0.06	6.22±0.17	34	8.54±0.21	7.11±0.21	2.56±0.07	6.73±0.19
13. Alberche	83	7.88±0.18	6.38±0.19	2.33±0.07	6.22±0.16	75	8.49±0.22	6.99±0.24	2.56±0.09	6.78±0.22
14. Eresma	231	7.96±0.20	6.59±0.20	2.39±0.07	6.27±0.16	245	8.54±0.20	7.15±0.22	2.60±0.08	6.83±0.18
15. Cega	136	7.85±0.18	6.46±0.20	2.38±0.07	6.21±0.15	118	8.43±0.19	7.00±0.22	2.59±0.08	6.73±0.19
16. Júcar	36	8.28±0.19	7.09±0.17	2.63±0.09	6.63±0.13	24	8.80±0.21	7.59±0.22	2.81±0.08	7.08±0.16
17. Bejarano	51	8.09±0.20	7.13±0.21	2.54±0.07	6.65±0.19	52	8.82±0.19	7.82±0.19	2.81±0.08	7.34±0.18
18. Monachil	52	8.03±0.14	6.82±0.14	2.48±0.07	6.46±0.14	50	8.54±0.16	7.39±0.17	2.66±0.09	6.94±0.18