A non-exhaustive list of data showing similar qualitative behavior of photoreceptors across different taxa.

Citation numbers are in square brackets, and the relevant figures for each follow in parentheses. In the third column of references, the specified value for W is the measured power law fit of the Weber-Fechner law. In the case of the Limulus response, data showing a distinct saddle (‘camel hump’) in the flash response are indicated by an asterisk (*). In the last column, data not showing band-passing characteristics are marked “NoBP.” We mention in passing that the flash response overshoot in insect photoreceptors is slight compared to that recorded in cells immediately post-synaptic to them, the laminar monopolar cells [70], [71]; we expect that a variant of the DA model applies to these laminar cells.