Multiple spectral classes of photoreceptors in the retinas of gonodactyloid stomatopod crustaceans

摘要: 1. We examined the compound eyes of 2 species gonodactyloid stomatopods, Gonodactylus oerstedii and Pseudosquilla ciliata, using end-on microspectrophotometry frozen sections dark-adapted retinas. 2. The cornea crystalline cones both were virtually transparent from 350 to 700 nm. Primary screening pigment granules in retinular cells had broad absorption spectra typical ommochromes. Colored vesicles, unknown function, also found cytoplasm cells. The intrarhabdomal filters appeared act as long-pass spectral filters, maximum optical densities situ 0.94 11.1. 3. A variety visual pigments species, each a specific retinal region. Their peaked at wavelengths 400 nm well beyond 530 nm. 4. Spectral sensitivity functions all regions estimated. In 4 most dorsal ommatidial rows central band pair narrow sensitivitity curves, usually separated by 50 75 These pairs covered spectrum below 650 other identical, functions. Spectral sensitivities peripheral ommatidia but different any region band. 5. These stomatopod have retained crustacean layered rhabdoms retina ventral band, converted photoreceptors into many 8 narrowly tuned classes. This design could serve high-quality hue discrimination system.