Table 4 Reconstruction of Cyrtocrinus praenutans based on material from La Pouza
From: Crinoids from the Middle Jurassic (Bajocian–Lower Callovian) of Ardèche, France
Type of ossicle | Total number (see Table 2) | Relation to number of cups |
|---|---|---|
Cups | 2,443 | |
Topmost columnals | 1,814 | 74.2 %: roughly corresponding to cups |
Columnals and topmost columnals | 9,804 | 4 columnals per animal |
Attachment discs | 1,069 | 44 % of cup number |
First primibrachials (5 per animal) | 4,165 | 833 animals, impoverished |
Second primibrachials (5 per animal) | 11,921 | 2,384 animals, corresponding to cups |
Secundibrachials (10 arms per animal) | 58,771 | 5,877 per arm = 2.4 ossicles on each arm of animal (impoverished) |