Functional adaptation of spiriferide brachiopod morphology.

摘要: It has been suggested that spiriferide morphologies have evolved to adapt a variety of environmental conditions. Through computational fluid dynamics approach, we examined how the original form was optimized for lotic condition, specifically addressing functionalization Devonian brachiopod Paraspirifer bownockeri generate passive feeding flows. The results using four models, each which differed in development shell depression, i.e. sulcus, showed deeper sulcus functions create strong spiral flows so as align on organ inside shell. Among sulcus-developed only mimic natural could comparative slow with stable inflow area. fossil record spiriferides shows morphological trade-off between and wing form. We concluded shells such combination produce various strategies, resulting diversification.