Can anyone think of a filter feeding terrestrial invertebrate?
2) Dispersing stages of offspring during development, terrestrial invertebrates usually remain sedentary during development (NOT SESSILE)-although spiders offer a strange exception here too with their ballooning habits. For small animals living in an aquatic enviroment, they are subject to very low REYNOLDS numbers. Reynolds numbers are essentially a ratio of inertial to viscous forces. What this means is that small swimming organisms never glide to a stop. When they stop propulsion-they stop moving. This means that water moves around bristly appendages instead of through them. You will observe bristle-like or rake-like appendages in many small microscopic invertebrates. These appendages function like a solid paddle. That means they are CRUMMY for filtering food. Physical selection pressures are very different on small marine animals than large ones is the bottom line. This is true for terrestrial invertebrates as well. Ever wonder why there are no large insects? Ill answer that questi
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