I have searched, with electron microscopy, several different mammalian species for a pattern in the RER of protein which might be considered an accumulation – paracrystalline inclusion like thing comparable to what I have seen in guinea pig, ferret and dog, but none seen so far in owl monkey.  Here is a cut and pseudocolored image of a moderately good type II cell from an owl monkey…. taken for another study (anm #1 neg 7160 bl 24060, untreated routine TEM) in 1982. Lamellar bodies are mostly empty in this particular image.

The nucleus is pretty dense, lots of condensed chromatin on the right hand side, and perhaps a portion of the nucleolus is there. There are some dense blue granules (presumed to be glycogen) near the bottom of the type II cell and also scattered elsewhere. (The type II cell was cut out using the eraser tool and lasso tool, and dirt and scratches were removed with the “bandaid” tool in photoshop).