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n. pl. py·gid·i·a (-ē-ə)
The posterior body region or segment of certain invertebrates.

[New Latin, from Greek pugidion, diminutive of pugē, buttocks.]

py·gid′i·al (-ē-əl) adj.


(paɪˈdʒɪdɪəm; -ˈɡɪd-)
n, pl -ia (-ɪə)
(Zoology) the terminal segment, division, or other structure in certain annelids, arthropods, and other invertebrates
[C19: from New Latin, from Greek pugē rump]
pyˈgidial adj


(paɪˈdʒɪd i əm)

n., pl. -gid•i•a (-ˈdʒɪd i ə)
any of various structures or regions at the caudal end of the body in certain invertebrates.
[1840–50; < Greek pȳg(ḗ) rump + -idium]
py•gid′i•al, adj.
References in periodicals archive ?
websteri exhibit a high degree of morphological plasticity in the palp pigmentation pattern, the shape of the anterior edge of the prostomium, the shape of the major spines on chaetiger 5, and the shape of the pygidium.
Pygidium with anus surrounded by several terminal lobes and with two large ventral cirri (Figs.
Then, the male held the female with the pairs of legs, and positioned the posterior part of its body next to the female pygidium and inserted the aedeagus to begin copulation.
Para la confirmacion de la especie se tomo en cuenta el pygidium (Figura 3c) el cual presento el dorso esclerotizado en un patron reticulado, con un par de lobulos medios redondeados bien separados y un par de setas marginales entre ellos.
The correlations analysis of Spearman's shows that rainfall acts negatively on reproductive activity (P = 0,0132, Ratio= -0,68) by preventing the theft of the adult males on lemon-tree, (P = 0,060, Ratio= -0,55) for the sliding of the females towards the party inferior of the buckler, to display their pygidium to the coupling on the orange-tree.