Table 2.
Morphological characters used in the morphometric analysis of ten populations of M. paucispinus and three populations of M. concinnus occurring in the Chapada Diamantina, Brazil
| Characters | M. paucispinus | M. concinnus |
|---|---|---|
| Stems | ||
| 01. Length (mm) | 69·21 ± 14·27 (21·00–133·10) | 84·07 ± 14·65 (34·10–107·30) |
| 02. Width (mm) | 155·41 ± 20·15 (16·80–201·10) | 129·96 ± 9·90 (84·10–146·90) |
| Ribs | ||
| 03. Number | 9·64 ± 0·77 (8·0–15·0) | 8·52 ± 0·71 (8·0–11·0) |
| 04. Height (mm) | 15·36 ± 8·44 (0·40–39·30) | 24·70 ± 8·56 (9·60–42·30) |
| 05. Width at 1/4 (mm)* | 43·46 ± 5·79 (27·60–61·40) | 46·40 ± 5·34 (30·0–56·0) |
| 06. Width at 2/4 (mm) | 37·16 ± 4·94 (22·10–50·40) | 37·09 ± 5·58 (19·30–50·30) |
| 07. Width at 3/4 (mm) | 29·99 ± 4·85 (5·0–46·20) | 26·10 ± 4·75 (14·80–35·90) |
| 08. Number of areoles | 5.33 ± 0·75 (3·0–9·0) | 6·66 ± 0·74 (5·0–8·0) |
| Spines (mean of four areoles of different ribs) | ||
| 09. Lower number of radials | 4·21 ± 0·90 (3·0–6·0) | 5·98 ± 0·99 (5·0–7·0) |
| 10. Higher number of radials | 4·52 ± 0·75 (3·0–6·0) | 6·42 ± 0·91 (5·0–7·0) |
| 11. Length of right radial (mm) | 20·26 ± 3·30 (11·36–28·65) | 20·60 ± 2·40 (16·88–26·98) |
| 12. Length of lower radial (mm) | 22·36 ± 3·61 (12·45–33·28) | 22·91 ± 3·38 (15·65–30·30) |
| 13. Length of left radial (mm) | 20·52 ± 4·70 (12·78–60·60) | 21·04 ± 2·45 (16·83–28·20) |
| 14. Diameter of the lower radial (mm) | 1·77 ± 0·99 (1·0–17·0) | 1·43 ± 1·39 (1·0–12·20) |
| 15. Angle between right and left radials | 166·32 ± 14·28 (111·0–182·0) | 160·41 ± 15·73 (130·0–188·0) |
| Cephalium | ||
| 16. Length (mm) | 32·18 ± 15·00 (4·90–78·20) | 33·97 ± 16·40 (8·70–68·10) |
| 17. Width (mm) | 70·75 ± 10·41 (18·60–97·30) | 70·87 ± 16·06 (29·40–102·50) |
Values shown are means ± s.d., with minimum and maximum recorded values in brackets.
*
Width of ribs at one-, two- and three-quarters along their length.