Figure 1 in Karyotypes of water scavenger beetles (Coleoptera: Hydrophilidae): new data and review of published records

Figure 1. Tissues of hydrophiloid beetles used for chromosome preparations (as dissected, without any additional treatment, (B–E) in dorsal view; (A) Helophorus grandis; (B, C, I) Laccobius bipunctatus; (D–H) Coelostoma orbiculare). A, egg with a developing embryo. B–C, internal organs of the same male specimen in translucent light (B) and on black background (C). D, internal organs of a female with digestive system pulled aside. E, internal organs of male specimen. F, details of ovarioles and associated accessory glands. G–I, detail of midgut structure on black background (G) and in translucent light (H, I). Abbreviations: accg, accessory glands; aed, aedeagus; hg, hindgut; mg, midgut; Mt, Malpighian tubes; oo, ovarioles; ovi, ovipositor; rc, regeneration crypts; tes, testes. Not to scale.