- echinoderms, and
other aquatic invertebrates. The
excretion of urea is
called ureotelism. Land animals,
mainly amphibians and mammals,
convert ammonia into urea...
- ammonia.
Ureotelism appears to be the
ancestral condition among primitive amniotes, and it is
retained by mammals,
which likely inherited ureotelism from...
- Herbert; Thierauch, Karl-Heinz; Del Pino,
Eugenia M. (January 1992). "
Ureotelism as the
prevailing mode of
nitrogen excretion in
larvae of the marsupial...
- Heidelberg. Denton, D. A.; Reich, M.; Hird, F. J. R. (22
March 1963). "
Ureotelism of
Echidna and Platypus". Science. 139 (3560): 1225. Bibcode:1963Sci....
