prothorax
Noun
Meaning
The first or anterior segment of the thorax in insects. See Illusts. of Butterfly and Coleoptera.
Source: Webster's dictionarySynonyms
thorax
scutellum
pronotum
thoracic shield
dorsal plate
thoracic carapace
thoracic casing
thoracic covering
thoracic exoskeleton
thoracic plate
thoracic scale
thoracic segment
thoracic sheath
thoracic armor
thoracic integument
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The prothorax is small and is flattened dorsally into a shield-like disc which has two transverse ridges.
They are easily identifiable by their head, which is wider than the prothorax.