From the spectacularly sharp discontinuities observed in the
radio continuum and Lyman-alpha images of several radio
galaxies we have very recently argued that these ellipticals
are surrounded by dusty SUPERDISKS, extended on ~100 Kpc scale.
This NEWLY IDENTIFIED feature can play a crucial role in the
models of radio galaxy formation. ISO offers good prospects of
providing their first ever images in emission, which are
indispensable for understanding this phenomenon. Quite likely,
the reported detection of the z = 3.8 radio galaxy 4C41.17 in
the rest-frame far-infrared using the IRAM and JCMT telescopes
dishes corresponds to the superdisk inferred by us in this very
distant galaxy.
We propose a deep imaging in mid/far-IR of two best superdisk
targets associated with classical radio galaxies at z ~0.1 .