Key Position: 5 | Back to (3b) |
5 a. Apertural lip thickened and at an angle of 45-60 degrees with respect to the test; spines absent.
SEE Figure 5-1 |
5 b. Apertural lip thickened and at an angle of 45-60 degrees with respect to the test; spines present. |
FIGURE 5-1
Centropyxis constricta (Ehrenberg 1843) "aerophila" |