화석명 : 해백합 부표화석(crinoid holdfast or flotation bulb)
학명 : Scyphocrinite sp.
원산지 : Erfoud, Morocco(Djebel Issoumour)
시대 : Upper Silurian
Size : 10cm + 9cm + 7.5cm(가로 + 세로 + 높이)

 

Scyphocrinites sp. crinoid holdfast or flotation bulb

In Silurian loboliths (Camarocrinus, bladder-like root of Scyphocrinites) two morphogenetic types are recognized: an older and previously almost unknown ‘cirrus lobolith’, and the familiar cosmopolitan ‘plate lobolith’. Their functional interpretation as buoys, for the latter type so far mainly based on its unusual form and mode of occurrence, is supported by (1) approximation to the paradigm, (2) buoyancy calculations of the gas contents, and (3) physical-technical considerations based on the optimation involved in the phylogenetic transition from cirrus to plate loboliths.