SEM illustrations of structural features of body parts of Geocharidius species. A–C head, dorsal aspect: A G. balini B G. zullinii CG. andersoni.D–F right half of pronotum, dorsal aspect: D G. balini E G. zullinii F G. andersoni. G–I basal part of right elytron: G G. balini H G. zullinii I G. andersoni Legend: bm – basal margin; cl – clypeus; ft – frontal tubercle; lb – labrum; mp3 – maxillary palpomere 3; mp4 – maxillary palpomere 4. Scale = 0.05mm.