Table 1.

Morphological similarity and disparity of antennae and labia between phytophagous and predatory stink bugs.

Morphological Characters	Similarity	Disparity
Antennal morphology	Five segments, including a proximal scape, a subdivided pedicel forming two segments, a basiflagellomere, and a distiflagellomere	N.A.
Antennal sensilla type and arrangement	Mainly four types, antennal sensilla chaetica, sensilla trichodea, sensilla basiconica, and sensilla coeloconica	A higher density of sensilla basiconica is observed on distiflagellomere in predatory Eocanthecona furcellata than in phytophagous species
Labial morphology	Tubular; straight; and segmented into four, namely labial segment I to IV from base to distal end	Slender in phytophagous species while stout in predators
Labial sensilla complex and arrangement	Mainly two types, labial sensilla trichodea and sensilla basiconica	Labial sensillum basiconica is the main type in phytophagous species (except for Erthesina fullo), while both sensillum trichodea and basiconica are the two main types in predators.
Labial cuticular projections	Present in phytophagous and predatory species	Short and slightly branched in phytophagous species, while long and multi-branched in predators
Mandibular stylet shape	With scale-like patterns, several central teeth, and lateral teeth; and the central teeth are flattened, rounded, and broad in phytophagous and predatory species	The lateral teeth are short, blunted, and symmetrically aligned in phytophagous species, while predators possess elongated and hook-like lateral teeth irregularly arranged on the mandible
Maxillary stylet shape	Left–right asymmetrical, with one stylet narrower than the other on the distal end	With short and sharp tipped barbs exclusively on the maxillae of predatory species