Table 1. Numbers and percentages of Calloria inconspicua and Notosaria nigricans displaying shell colouration in the fossil locality in the Wanganui Basin, New Zealand. Equivalent data for the Recent population of Calloria inconspicua from Portobello Harbour are also presented (Notosaria nigricans is absent from this locality).
|
Calloria inconspicua |
||||
| Wanganui Basin (80 ka) | Portobello Harbour (Recent) | |||
|
Total Number of shells |
Number(%) Coloured |
Total Number of shells |
Number(%)Coloured |
|
| Surface |
54 |
36 (67%) |
281 |
160 (57%) |
| Subsurface |
323 |
261 (81%) |
321 |
148 (46%) |
|
Notosaria nigricans |
||||
| Wanganui Basin (80 ka) | ||||
|
Total Number of shells |
Number(%) Coloured |
|||
| Surface |
23 |
5 (22%) |
- |
- |
| Subsurface |
179 |
75 (42%) |
- |
- |
