Deliberations on the External Morphology and Modification of the Labial Segments in the Nepomorpha (Heteroptera: Insecta) with Notes on the Phylogenetic Characteristics
Shapes of the labial segments of the Nepidae (Nepinae). (a)-(b). Borborophyes mayri. (a) Dorsal view (D) of the labium, shapes of the II, III, and IV segments are visible, the stylet groove (gr) is opened, the articulation of the dorsal condyle (cd) between the II and III segments on the dorsal side, intercalary sclerites (is) on the III segment. (b) The shape of the first segment is visible, the base of the second (II) segment in narrower than the base of the first (I) segment, the midventral condyles (cv) on the distal edge of the first segment (I) and third segments are present, the oval apical plate and the intersegmental membranes are present. Mxp: maxillary plates.
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