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Figure 5 in Larval morphology of the genus Hydrocassis Fairmaire (Coleoptera: Hydrophilidae)

Figure 5. Head appendages of Hydrocassis jengi Satô, second instar. (A) Right antenna, dorsal view; (B,C) mandibles, dorsal view; (D) right maxilla, dorsal view; (E) right maxilla, ventral view; (F) labium, dorsal view; (G) labium, ventral view. Black square indicates additional sensilla.

Figure 3 in Larval morphology of the genus Hydrocassis Fairmaire (Coleoptera: Hydrophilidae)

Figure 3. Primary chaetotaxy of head appendages of Hydrocassis lacustris Sharp, first instar. (A) Right antenna, dorsal view; (B) left mandible, dorsal view; (C) left maxilla, dorsal view; (D) left maxilla, ventral view; (E) labium, dorsal view; (F) labium, ventral view. Black square indicates additional sensilla.

Figure 2 in Larval morphology of the genus Hydrocassis Fairmaire (Coleoptera: Hydrophilidae)

Figure 2. Primary chaetotaxy of head capsule of Hydrocassis lacustris Sharp, first instar. (A) Dorsal view; (B) ventral view; (C) detail of anterior margin of head capsule, dorsal view.

Figure 8 in Larval morphology of the genus Hydrocassis Fairmaire (Coleoptera: Hydrophilidae)

Figure 8. Scanning electron micrographs of Hydrocassis lacustris Sharp, first instar. (A) Head, dorsal view; (B) head, lateral view; (C) head capsule, dorsal view; (D) head appendages, dorsal view.

Figure 1 in Larval morphology of the genus Hydrocassis Fairmaire (Coleoptera: Hydrophilidae)

Figure 1. Habitus of Hydrocassis larvae, dorsal and ventral views. (A) Hydrocassis lacustris Sharp, third instar; (B) Hydrocassis jengi Satô, second instar; (C) Hydrocassis uncinata Ji et Schödl, third instar.

Figure 10 in Larval morphology of the genus Hydrocassis Fairmaire (Coleoptera: Hydrophilidae)

Figure 10. Hydrocassis uncinata Ji et Schödl, third instar, dorsal view. (A) Whole larva; (B) head; (C) clypeolabrum; (D) spiracular atrium; (E) tubercular pattern of thoracic and abdominal segments. Abbreviations see Figure 4.

Figure 6 in Larval morphology of the genus Hydrocassis Fairmaire (Coleoptera: Hydrophilidae)

Figure 6. Hydrocassis lacustris Sharp, third instar, dorsal view. (A) Whole larva; (B) head; (C) clypeolabrum; (D) spiracular atrium; (E) tubercular pattern of thoracic and abdominal segments. Abbreviations see Figure 4.

Figure 4 in Larval morphology of the genus Hydrocassis Fairmaire (Coleoptera: Hydrophilidae)

Figure 4. Hydrocassis jengi Satô, second instar, dorsal view. (A) Whole larva; (B) head; (C) clypeolabrum; (D) spiracular atrium; (E) tubercular pattern of thoracic and abdominal segments. Abbreviations: T3, metathorax; A1, 2, 6, 7, abdominal segments 1, 2, 6 and 7.

Figure 9 in Larval morphology of the genus Hydrocassis Fairmaire (Coleoptera: Hydrophilidae)

Figure 9. Scanning electron micrographs of Hydrocassis lacustris Sharp, third instar, dorsal view. (A) Head; (B) head capsule; (C) head appendages; (D) prothorax and mesothorax.

FIGURES 1–4 in The immature stages of Tropisternus (Pleurhomus) sahlbergi (Sharp) (Coleoptera: Hydrophilidae), with considerations on the primary chaetotaxy of Tropisternus Solier

FIGURES 1–4. Tropisternus sahlbergi, (1) egg case, lateral view, constructed under a leaf of Lemna sp.; (2) first-instar larva: habitus, dorsal view; (3) pupa, dorsal view; (4) pupa, ventral view. Scale bars = 1 mm.

FIGURES 10–12 in The immature stages of Tropisternus (Pleurhomus) sahlbergi (Sharp) (Coleoptera: Hydrophilidae), with considerations on the primary chaetotaxy of Tropisternus Solier

FIGURES 10–12. Tropisternus sahlbergi, first-instar larva: (10) left antenna, dorsal view; (11) left maxilla, dorsal view; (12) right maxilla, ventral view. Scale bars = 0.10 mm.

FIGURES 7–9 in The immature stages of Tropisternus (Pleurhomus) sahlbergi (Sharp) (Coleoptera: Hydrophilidae), with considerations on the primary chaetotaxy of Tropisternus Solier

FIGURES 7–9. Tropisternus sahlbergi, first-instar larva: (7) frontoclypeus, dorsal view; (8) left mandible, dorsal view; (9) right mandible, dorsal view. Scale bars = 0.10 mm.

FIGURES 17–21 in The immature stages of Tropisternus (Pleurhomus) sahlbergi (Sharp) (Coleoptera: Hydrophilidae), with considerations on the primary chaetotaxy of Tropisternus Solier

FIGURES 17–21. Tropisternus sahlbergi, third-instar larva: (17) left antenna and mandible, dorsal view; (18) labium, dorsal view; (19) right maxilla, dorsal view; second-instar larva: (20) nasale, ventral view, arrows show anteroventral teeth; (21) prothoracic leg, posterior view. Scale bars = 0.10 mm.

FIGURES 5–6 in The immature stages of Tropisternus (Pleurhomus) sahlbergi (Sharp) (Coleoptera: Hydrophilidae), with considerations on the primary chaetotaxy of Tropisternus Solier

FIGURES 5–6. Tropisternus sahlbergi, first-instar larva: (5) head capsule, dorsal view; (6) head capsule, ventral view. Scale bars = 0.10 mm.

FIGURES 13–14 in The immature stages of Tropisternus (Pleurhomus) sahlbergi (Sharp) (Coleoptera: Hydrophilidae), with considerations on the primary chaetotaxy of Tropisternus Solier

FIGURES 13–14. Tropisternus sahlbergi, first-instar larva: (13) labium, dorsal view; (14) labium, ventral view. Scale bar = 0.10 mm.

FIGURES 15–16 in The immature stages of Tropisternus (Pleurhomus) sahlbergi (Sharp) (Coleoptera: Hydrophilidae), with considerations on the primary chaetotaxy of Tropisternus Solier

FIGURES 15–16. Tropisternus sahlbergi, first-instar larva: (15) prothoracic leg, anterior view; (16) prothoracic leg, posterior view. See Material and Methods for explanation on the abbreviations for the groups of setae. Scale bar = 0.10 mm.

Figure 6 in Karyotypes of water scavenger beetles (Coleoptera: Hydrophilidae): new data and review of published records

Figure 6. Karyotypes of the Hydrophilini. A–C, Hydrophilus, mitotic karyotype from embryo (A–B, Hydrophilus piceus; C, Hydrophilus pistaceus). D–H, Hydrochara: (D–F) Hydrochara caraboides, mitotic karyotype, embryo; (G–H) Hydrochara flavipes, mitotic karyotype, midgut. I–J, Sternolophus solieri (I, male mitotic karyotype; J, meiotic first metaphase from testes). A, C, D, G, I, without treatment. B, E, F, H, C-banded. Habitus figures: (K) Sternolophus solieri; (L) Hydrochara caraboides; (M) Hydrophilus piceus, from Short & Fikáček (2013).

Figure 5 in Karyotypes of water scavenger beetles (Coleoptera: Hydrophilidae): new data and review of published records

Figure 5. Karyotypes of the Hydrobiusini. A–D, Limnohydrobius convexus: (A–B) mitosis, midgut; (C–D): testis, prometaphase. F–J, Limnoxenus niger: (F–H) midgut; (I–J) meiotic metaphase I, testes. A–C, E–F, I, without treatment. D, G, H, J, C-banded. Habitus figures: (E) Limnohydrobius convexus; (K) Limnoxenus niger.

Figure 3 in Karyotypes of water scavenger beetles (Coleoptera: Hydrophilidae): new data and review of published records

Figure 3. Karyotypes of the Laccobiini, without treatment. A–H, Paracymus: (A–B) Paracymus aeneus, mitotic metaphase from midgut; (C–D) Paracymus scutellaris (C, spermatogonial mitosis, metaphase; D, mitotic metaphase from midgut.); (E–G) meiotic metaphase I from testes (E, Paracymus aeneus; F–G, Paracymus scutellaris). I–M, Tormus, mitotic metaphase from midgut: (I, K) Tormus posticalis; (J, L) Tormus helmsi. Habitus figures: (G) Paracymus scutellaris; (M) Tormus helmsi, from Fikáček et al. (2013).

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.