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29 results for “Tropisternus”
Figure 2 in Morphology of the male reproductive tract in the water scavenger beetle Tropisternus collaris Fabricius, 1775 (Coleoptera: Hydrophilidae)
Figure 2 Histology of the male reproductive tract of T. collaris. (A) Longitudinal section of a testis showing the follicles (f); growth (a), maturation (b), and differentiation (c) zones; and vas efferens (ve) opening (arrow) into a vas deferens (vd) with lumen full of spermatozoa (asterisk). (B) Longitudinal section showing detail of the vasa efferentia (ve) in the confluence zone (black arrow) with the vas deferens (vd). The white arrow points to sperm bundles in the vas efferens. The asterisk indicates the lumen of a vas deferens with dissociated bundles. The arrowhead points to the epithelial of the vas deferens. (C and D) Details of the stages of spermatogenesis, showing zones of cell growth (a), maturation (b), and differentiation (c). The arrow points to a sperm bundle. Bars: A and B = 600 µm, C and D = 200 µm.
FIGURES 1–2 in Three new species of Neotropical Tropisternus Solier (Coleoptera: Hydrophilidae)
FIGURES 1–2. Dorsal view of the aedeagus of Tropisternus. 1: T. phyllisae sp. n. (paratype), 2: T. richmondi sp. n. (paratype) Scale bar=0.5 mm.
FIGURES 30–32 in Description of the preimaginal stages of three species of the genus Tropisternus Solier, subgenus Strepitornus Hansen (Coleoptera: Hydrophilidae), with emphasis on morphometry and chaetotaxy
FIGURES 30–32. Developmental times of immature stages: 30, T. scutellaris; 31, T. collaris; 32, T. parananus. L1, L2, L3 = first-, second- and third-instar larva, respectively.
FIGURES 22–27 in Description of the preimaginal stages of three species of the genus Tropisternus Solier, subgenus Strepitornus Hansen (Coleoptera: Hydrophilidae), with emphasis on morphometry and chaetotaxy
FIGURES 22–27. Tropisternus scutellaris, third-instar larva: 22, habitus, dorsal view; 23, left mandible, dorsal view; 24, right mandible, dorsal view; 25, labium, dorsal view; 26, left maxilla, dorsal view; 27, left antenna, dorsal view. Scale bars: Fig. 22 = 1.0 mm, Figs. 23–24 = 0.5 mm, Figs. 25–27 = 0.1 mm.
FIGURES 28–29 in Description of the preimaginal stages of three species of the genus Tropisternus Solier, subgenus Strepitornus Hansen (Coleoptera: Hydrophilidae), with emphasis on morphometry and chaetotaxy
FIGURES 28–29. Tropisternus scutellaris, pupa: 28, dorsal view; 29, ventral view. Scale bar = 1.0 mm.
FIGURES 7–13 in Description of the preimaginal stages of three species of the genus Tropisternus Solier, subgenus Strepitornus Hansen (Coleoptera: Hydrophilidae), with emphasis on morphometry and chaetotaxy
FIGURES 7–13. Tropisternus scutellaris, first-instar larva: 7, left mandible, dorsal view; 8, right mandible, dorsal view; 9, left maxilla, dorsal view; 10, right maxilla, ventral view; 11, left antenna, dorsal view; 12, labium, dorsal view; 13, labium, ventral view. Scale bars = 0.1 mm.
FIGURES 14–18 in Description of the preimaginal stages of three species of the genus Tropisternus Solier, subgenus Strepitornus Hansen (Coleoptera: Hydrophilidae), with emphasis on morphometry and chaetotaxy
FIGURES 14–18. Tropisternus scutellaris, legs: 14, prothoracic leg of first-instar larva, anterior view; 15, detail of the same; 16, prothoracic leg of first-instar larva, posterior view; 17, prothoracic leg of third-instar larva, anterior view; 18, prothoracic leg of third-instar larva, posterior view. Scale bars = 0.1 mm.
FIGURES 19–21 in Description of the preimaginal stages of three species of the genus Tropisternus Solier, subgenus Strepitornus Hansen (Coleoptera: Hydrophilidae), with emphasis on morphometry and chaetotaxy
FIGURES 19–21. Head capsule of third-instar larvae of Tropisternus, dorsal view: 19, T. scutellaris; 20, T. collaris; 21, T. parananus. Scale bar = 0.5 mm.
FIGURES 1–3 in Description of the preimaginal stages of three species of the genus Tropisternus Solier, subgenus Strepitornus Hansen (Coleoptera: Hydrophilidae), with emphasis on morphometry and chaetotaxy
FIGURES 1–3. Egg cases of Tropisternus: 1, T. scutellaris; 2, T. collaris; 3, T. parananus. Scale bar = 2.0 mm.
FIGURES 4–6 in Description of the preimaginal stages of three species of the genus Tropisternus Solier, subgenus Strepitornus Hansen (Coleoptera: Hydrophilidae), with emphasis on morphometry and chaetotaxy
FIGURES 4–6. Tropisternus scutellaris, first-instar larva: 4, head capsule, dorsal view; 5, head capsule, ventral view; 6, frontoclypeus, dorsal view. Scale bars: Figs. 4–5 = 0.2 mm, Fig. 6 = 0.1 mm.
FIGURES 1–6 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms
FIGURES 1–6. Egg cases and larva of Tropisternus. 1, T. latus, egg case with mast; 2, T. latus, egg case without mast; 3, T. ovalis, egg case with larva emerging; 4, T. laevis, third instar larva, anterior aspect in dorsal view; 5, T. laevis, egg case showing the globular mast; 6, T. laevis, floating egg case as found in nature. Scale bars = 5 mm for figs. 1, 2, 5 and 6; 2 mm for fig. 3; 1 mm for fig. 4.
FIGURES 32–38. Tropisternus laevis, first instar larva. 32 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms
FIGURES 32–38. Tropisternus laevis, first instar larva. 32, Head capsule, dorsal view; 33, Head capsule, ventral view; 34, Frontoclypeus, dorsal view; 35, Labium, dorsal view; 36, Labium, ventral view; 37, Left mandible, dorsal view; 38, Right mandible, dorsal view. Scale bars = 0.1 mm.
FIGURES 18–21. Tropisternus pupae. 18, T in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms
FIGURES 18–21. Tropisternus pupae. 18, T. latus, habitus, dorsal view; 19, T. latus, habitus, ventral view; 20, T. ovalis, habitus, dorsal view; 21, T. ovalis, habitus, ventral view. Scale bars = 1 mm.
FIGURES 29–31. Tropisternus ovalis, first instar larva. 29 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms
FIGURES 29–31. Tropisternus ovalis, first instar larva. 29, Left antenna, dorsal view; 30, Left maxilla, dorsal view; 31, Right maxilla, ventral view. Scale bars = 0.1 mm.
FIGURES 13–17. Tropisternus latus, first instar larva. 13 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms
FIGURES 13–17. Tropisternus latus, first instar larva. 13, Left antenna, dorsal view; 14, Left maxilla, dorsal view; 15, Right maxilla, ventral view; 16, Left mandible, dorsal view; 17, Right mandible, dorsal view. Scale bars = 0.1 mm.
FIGURES 22–28. Tropisternus ovalis, first instar larva. 22 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms
FIGURES 22–28. Tropisternus ovalis, first instar larva. 22, Head capsule, dorsal view; 23, Head capsule, ventral view; 24, Frontoclypeus, dorsal view; 25, Labium, dorsal view; 26, Labium, ventral view; 27, Left mandible, dorsal view; 28, Right mandible, dorsal view. Scale bars = 0.1 mm.
FIGURES 7–12. Tropisternus latus, first instar larva. 7 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms
FIGURES 7–12. Tropisternus latus, first instar larva. 7, Head capsule, dorsal view; 8, Head capsule, ventral view; 9, Head capsule, right lateral view; 10, Labium, dorsal view; 11, Labium, ventral view; 12, Frontoclypeus, dorsal view. Scale bars = 0.1 mm.
FIGURES 39–41. Tropisternus laevis, first instar larva. 39 in Description of immatures of the genus Tropisternus Solier, subgenus Pristoternus Orchymont (Coleoptera: Hydrophilidae), with emphasis on the chaetotaxy and morphometry of larval forms
FIGURES 39–41. Tropisternus laevis, first instar larva. 39, Left antenna, dorsal view; 40, Left maxilla, dorsal view; 41, Right maxilla, ventral view. Scale bars = 0.1 mm.
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.
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