Archive image from page 18 of Differential growth in three ichthyosaurs Differential growth in three ichthyosaurs : Ichthyosaurus communis, I. breviceps, and Stenopterygius quadriscissus (Reptilia, Ichthyosauria) differentialgrow00mcgo Year: 1973 FUNCTIONAL MORPHOLOGY OF THE ICHTHYOSAUR TAIL Although excellent accounts of tail function in fishes are already available (see Alexander, 1967, 1968), it would be useful to outline some important points. Most swimming problems can be resolved in terms of the properties of inclined planes. When a bony fish with a homocercal tail sweeps its tail from
Archive image from page 18 of Differential growth in three ichthyosaurs Differential growth in three ichthyosaurs : Ichthyosaurus communis, I. breviceps, and Stenopterygius quadriscissus (Reptilia, Ichthyosauria) differentialgrow00mcgo Year: 1973 FUNCTIONAL MORPHOLOGY OF THE ICHTHYOSAUR TAIL Although excellent accounts of tail function in fishes are already available (see Alexander, 1967, 1968), it would be useful to outline some important points. Most swimming problems can be resolved in terms of the properties of inclined planes. When a bony fish with a homocercal tail sweeps its tail from side to side the water resistance deflects the tail (Fig. 8a) about the peduncle, and the whole tail acts as an inclined plane moving at an acute angle of attack to the direction of motion of the tail (Fig. 8c), giving a resultant forward thrust (upthrust in Fig. 8d). Superimposed upon this direction of motion
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