Date: February 23, 2018
Source: Utah State University
Summary:
Caecilian, Siphonops annulatus, a limbless amphibian found throughout Brazil,
has a concentration of enlarged mucous glands in its head region and a
concentration of enlarged poison glands in its posterior region. These
concentration appear to have evolved from different selective pressures: the
ability to tunnel into the ground and to defend oneself from predators.
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