ARTHROPODA (II): General features (cont.) (Crustacea study images,
other arthropod study images;
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b) the image is actually a composite of many separate spots of light; but the eye cannot be focused
c) multiple evolutionary origins seem likely because details of ommatidium form vary among groups
d) many arthropods also have 'extra' median simple eyes (all groups except myriapods)
b) terrestrial (depend upon diffusion aided by inhalation/exhalation):
Copyright (c) 2017 by A. Richard Palmer. All rights reserved.
(revised Dec. 19, 2016)