P3Y4G2I1D2I1A1
14 points
PYGIDIA is validvalid
PYGIDIUM, the posterior region of certain invertebrates
PYGIDIUM, in trilobites, the posterior division of the body, formed by fusion of the telson with one or more posterior pleurae
PYGIDIUM, the posterior region of certain invertebrates
PYGIDIUM, in trilobites, the posterior division of the body, formed by fusion of the telson with one or more posterior pleurae