An opisthognathous head is positioned diagonally, such as species of Blattodea and some Coleoptera.
2.
In an opisthognathous head, it was positioned diagonally, such as species of Blattodea and some Coleopterans.
3.
The mouthparts, along with the rest of the head, can be articulated in at least three different positions : prognathous, opisthognathous and hypognathous.
4.
The mouthparts, along with the rest of the head, can be articulated in at least three different positions : prognathous, opisthognathous, and hypognathous.
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