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Fig. 6 in Echinococcus multilocularis (Cestoda, Cyclophyllidea, Taeniidae): functional ultrastructure of the penetration glands and nerve cells within the oncosphere
Fig. 6 TEM micrographs of the anterior, somatophore region of the oncosphere of Echinococcus multilocularis. a Pole of the hexacanth showing a bilateral symmetry. Note the presence of the arms of the type 1 penetration gland (PG1A) between the median (MH) and lateral (LH) pairs of oncospheral hooks. b Detail of an oncosphere with the peripheral disposition of a nerve cell process containing neurosecretory granules (nsg). c Enlarged detail of neurosecretory granules (nsg). H oncospheral hook, HM hook musculature, HRM hook region membrane, m mitochondria, OM oncospheral membrane, PG1 type 1 penetration gland, SM somatic musculature
Fig. 1 in Echinococcus multilocularis (Cestoda, Cyclophyllidea, Taeniidae): functional ultrastructure of the penetration glands and nerve cells within the oncosphere
Fig. 1 Schematic diagram illustrating localization of three secretory regions of the egg of Echinococcus multilocularis: two types of the penetration glands (PG1 and PG2) and two nerve cells (NC) of neurosecretory type. Note the oncospheral tegument composed of its peripheral anucleated layer and submerged subepithelial perikaryon and the hook region membrane surrounding the somatophore pole of the hexacanth. To simplify the diagram, some other oncospheral structures or cell types such as somatic and hook muscle systems with their
Fig. 2 in Echinococcus multilocularis (Cestoda, Cyclophyllidea, Taeniidae): functional ultrastructure of the penetration glands and nerve cells within the oncosphere
Fig. 2 Details of two infective hexacanths of Echinococcus multilocularis obtained by means of freeze substitution technique. a TEM micrograph showing the two penetration glands (PG1 and PG2) and a nerve cell (NC). Note: (i) the nucleus (N) of a nerve cell with heterochromatin islands (HCh), (ii) the presence of numerous mitochondria (m) and (iii) the neurosecretory granules (nsg) located in a nerve cell process. b Area of hexacanth with two penetration glands (PG1 and PG2). Note the "rouleau"-shaped assemblages (RA) of secretory granules of the type 1 penetration gland (sg1). H oncospheral hook, HM hook musculature, n nucleolus, OM oncospheral membrane, r ribosomes, sg2 secretory granules of the type 2 penetration gland
Figures 1-4 in Ultrastructural detection of lipids in the cephalic salivary glands of Apis mellifera and Scaptotrigona postica (Hymenoptera: Apidae) workers
Figures 1-4. Lipids, detected using imidazole-osmium, in cephalic salivary gland (CSG) cells of Apis mellifera workers. (1-2) Small droplets of lipid (arrows) dispersed in the cellular cytoplasm of a newly emerged worker (NE), mitochondria (m) of medium electron density and narrow alveolar lumens (l) containing scarce IO-positive secretion (s). (3-4) Gland cells from workers working in the brood comb area (CA). Note lipid droplets dispersed in the cytoplasm (arrows) (1C), heterogeneous granules (gr) (1D) and large amounts of lipid secretion (s) in the alveolar lumen (l). (c) Cuticle, (n) nuclei. Scale bars: 1, 2, 4 = 1 µm, 3 = 3 µm.
Figures 5-8 in Ultrastructural detection of lipids in the cephalic salivary glands of Apis mellifera and Scaptotrigona postica (Hymenoptera: Apidae) workers
Figures 5-8. Imidazole-osmium preparations for lipid detection in gland cells from Apis mellifera workers. (5-6) Gland cells from worker working in the brood comb area (CA) (5) and forager (FO) (6) showing lipid droplets dispersed in the apical region (arrow), infolds (i) of the apical membrane forming channels flanked by mitochondria (m). (6) Note the presence of lipid droplets in the apical channels (arrows). (7-8) Osmium-imidazole-positive dots spread in the cytoplasm (arrows) and vesicles (ve) of forager cellular glands. (c) Cuticle, (s) secretion. Scale bars: 5 = 3 µm, 6 = 2 µm, 7-8 = 1 µm.
Text-fig. Fig. 8. Cercidiphyllaceae. Archeampelos acerifolia (NEWBERRY) MCIVER et BASINGER. 1, 2 Lectotype, from Fort Union, North Dakota. 1. The leaf originally figured as plate 28, fig. 5 by Newberry (1878). USNM 551. 2. Detail of marginal dentition, showing a small gland at each tooth apex (arrows). Scale = 1 cm in 1; 0.5 cm in 2. in Revisions To Roland Brown'S North American Paleocene Flora
Text-fig. Fig. 8. Cercidiphyllaceae. Archeampelos acerifolia (NEWBERRY) MCIVER et BASINGER. 1, 2 Lectotype, from Fort Union, North Dakota. 1. The leaf originally figured as plate 28, fig. 5 by Newberry (1878). USNM 551. 2. Detail of marginal dentition, showing a small gland at each tooth apex (arrows). Scale = 1 cm in 1; 0.5 cm in 2.
Fig. 20 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 20. Light micrographs through gill gland of mature male Bryconadenos tanaothoros, SL 36.6 mm (USNM 352061). A, entire gill gland showing chambers (c) containing some stained material; unmodified gills are seen at the extreme left and right; bar, 100 µm. B, Enlargement of same specimen showing one chamber (c) with tall columnar cells in between reduced secondary lamellae (arrows); bar, 20 µm.
Fig. 19. Light micrographs through gill glands.A in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 19. Light micrographs through gill glands.A, male Attonitus bounites, SL 43.0 mm (USNM 349701), longitudinal section through gill gland showing the ventral epithelium (arrows) that results in the formation of gill gland chambers (c); arrowhead indicates an unmodified gill filament; bar, 200 µm. B, same specimen showing tall columnar cells (arrows) in between reduced secondary lamellae; s, secretory material; bar, 50 µm. C, male A. irisae, SL 46.1 mm (USNM 349698), longitudinal section through immature gill gland showing the epithelium (arrows) covering the gland chambers (c); bar, 200 µm.
Fig. 17 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 17. Scanning electron micrograph of spermatozoon in testis of male Bryconadenos tanaothoros (MCP 30333); arrow indicates point of exit of the flagellum from the cytoplasmic collar; bar, 1 µm.
Fig. 18 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 18. Transmission electron micrographs through spermatozoa from mature male Bryconadenos tanaothoros, SL 50.0 mm (USNM 352061). A-D, successively more posterior transverse sections; E-F, longitudinal sections. Symbols: n, nucleus; m, mitochondrion; p, proximal centriole; d, distal centriole; f, flagellum, arrows, accessory microtubules; arrowheads, cytoplasmic canal of collar. Bars: A-C, 0.2 µm; D, 0.1 µm; E-F, 0.5 µm.
Fig. 14 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 14. Knodus sp., MZUSP 38004. Inseminating species. Caudal-fin squamation. Male, SL 34.0 mm, lateral view left side, portraying scales moderately extended out onto caudalfin rays. Note: lateral line incomplete and not present in region shown. Brazil: Minas Gerais, riacho near Fazenda Poderosa, tributary to ribeirão Jaboticatubas, tributary to rio das Velhas, Campo Alegre.
Fig. 16 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 16. Light micrographs through mature ovaries of the three species of Attonitus; arrows, spermatozoa; bar, 10 µm. A, Attonitus ephimeros, SL 33.1 mm (USNM 349696). B, A. irisae, SL 36.6 mm (USNM 349704). C, A. bounites, SL 43.0 mm (USNM 349701).
Fig. 12. Bryconamericus iheringii, USNM 285884 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 12. Bryconamericus iheringii, USNM 285884. Non-inseminating species. Caudal-fin squamation. Male, SL 53.2 mm, lateral view left side, portraying scales confined to caudal-fin base. Brazil: Rio Grande do Sul, Arroio Garupá, tributary to rio Quaraí, tributary of rio Uruguay. Road: Uruguaiana-Quaraí, locality between Uruguaiana and Quaraí.
Fig. 7 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 7. Bryconadenos tanaothoros, new species, USNM 352061, paratype, SL 36.6 mm, adult male. Lateral view of left side of anterior region of anal fin illustrating glandular organ. Brazil: Mato Grosso: tributary to rio Suiazinho, near Ribeirão Cascalheira.
Fig. 1 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 1. Bryconadenos tanaothoros, two live adult male specimens in aquaria. Originally collected in Brazil: Mato Grosso; tributary to rio Suiazinho near Ribeirão Cascalheira. The reflective green shown especially by the lower specimen of the two sexually active males displays only weakly this color of the body sides. The position of the anal-fin gland can be seen as a pale gray-white oval area just posterior to the proximal end of the white pigment along the anterior border of the anal fin, especially in the upper male in the picture. Both males display the lateral-line pores and tubes outlined in black as occurs in live specimens.
Fig. 5 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 5. Bryconadenos tanaothoros, new species, paratype. USNM 352061, SL 34.7 mm, adult male. Lateral view of left side of anterior region of anal fin showing fusion of pterygiophores and respective medial radials of anterior five branched rays. Note that the pterygiophores lack anterior and posterior median blades for the origin of the erectors and depressors anales muscles. Brazil: Mato Grosso; tributary to rio Suiazinho near Ribeirão Cascalheira.
Fig. 4 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 4. Bryconadenos tanaothoros, new species, MZUSP 85852, SL 41.3 mm, adult male, holotype. Brazil: Mato Grosso, Serra do Roncador, tributary of rio Suiá-Missu, rio Xingu drainage.
Fig. 9 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 9. Bryconadenos tanaothoros, new species, USNM 352061, paratype, SL 33.7 mm, adult male. Jaws and dentition lateral view, left side. Brazil: Mato Grosso: tributary to rio Suiazinho, near Ribeirão Cascalheira.
Fig. 3 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 3. Bryconadenos tanaothoros, new species, MCP 30516, SL 32.0 mm, adult female. Brazil: Mato Grosso, córrego Tatu, on the road MT-423, GPS coordinates 11°28'36"S 54°58'47"W. Adult female freshly fixed in formalin. The dark chromatophores of this specimen associated with the lateral line are displayed almost evenly throughout the lateral line's length. The anal fin shows no evidence of a gland.
Fig. 2 in Putative relationships among inseminating and externally fertilizing characids, with a description of a new genus and species of Brazilian inseminating fish bearing an anal-fin gland in males (Characiformes: Characidae)
Fig. 2. Bryconadenos tanaothoros, new species, MCP 29476, SL 43.5 mm, adult male. Brazil: Mato Grosso, rio Ferro on the road between Novo Mato Grosso and Nova Ubiratã, about 25 km SW of Novo Mato Grosso, upper rio Xingu basin, GPS coordinates 13°3'32"S 55°2'12"W. Sexually active male specimen freshly fixed in formalin. The dark chromatophores of this specimen associated with the lateral line are contracted and barely visible anteriorly and do not show at all posteriorly. The position of the anal-fin gland can be seen as a yellowish brown oval area just posterior to the proximal end of the white pigment along the anterior border of the anal fin.
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