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18 results for “Saxidromidae”
FIGURE 3 in Fine Structure Of The Male Genital Systems, Spermatophores And Unusual Sperm Cells Of Saxidromidae (Acari, Actinotrichida)
FIGURE 3: TEM micrographs of vas deferens and ejaculatory duct of Bovidromus roussouwi. (a) – Composed figure showing complex structure of ejaculatory duct in cross section. Note large synspermium in dorsal chamber lined by peculiar cuticle. Arrow points to eugenital (primary) genital opening. Scale bar: 20 µm. (b) – Vas deferens. Note flat epithelium. Scale bar: 20 µm. (c) – Detail of epithelium of vas deferens with irregularly shaped microvilli. Cells contain many mitochondria and are underlain by a muscular layer. Scale bar: 2 µm. (d) – Dorsal chamber of ejaculatory duct with cuticular fringes and secretion. Scale bar: 10 µm. (e) – The ejaculatory duct is surrounded by a thick muscular layer. Scale bar: 10 µm. (f) – Eugenital opening (arrow) and accessory gland. Scale bar: 20 µm.
FIGURE 4 in Fine Structure Of The Male Genital Systems, Spermatophores And Unusual Sperm Cells Of Saxidromidae (Acari, Actinotrichida)
FIGURE 4:: TEM micrographs of transversely sectioned progenital chambers of Rhinodromus lootsi (a, d-f) and Bovidromus roussouwi (b, c). (a) – Posterior part of ejaculatory duct with eugenital opening (arrow) and secondary genital opening bordered by progenital lips. Note accessory gland and position of (retracted) genital papillae. Scale bar: 20 µm. (b) – Genital papilla. Note many mitochondria and peculiarly modified cuticle. Scale bar: 5 µm. (c) – Detail showing modified cuticle of genital papilla. Note the thick cuticle consisting mainly of many loosely arranged fibres and thus giving a cushion-like appearance. Scale bar: 1.2 µm. (d) – Progenital chamber and accessory glands. Scale bar: 20 µm. (e) – Accessory gland with branching ducts. The cells contain numerous lipid inclusions. Scale bar: 10 µm. (f) – Detail showing two sections through thin ducts, which are cuticle-lined. Scale bar: 2 µm.
FIGURE 2 in Fine Structure Of The Male Genital Systems, Spermatophores And Unusual Sperm Cells Of Saxidromidae (Acari, Actinotrichida)
FIGURE 2: TEM micrographs of details of testis of Rhinodromus lootsi (a-c, e) and Saxidromus delamarei (d). (a) – Overview of testis. Note thick epithelium comprising the glandular part and area with round spermatids composing the germinal part of testis. Scale bar: 20 µm. (b)– Detail of glandular part showing large nuclei, conspicuous nucleoli and Golgi bodies. Scale bar: 5 µm. (c) – Nuclear region of glandular epithelial cell with numerous rough ER cisternae and Golgi bodies. Scale bar: 2 µm. (d) – Detail of germinal part of testis of S. delamarei showing synspermatid containing four nuclei (N1-N4). White arrows indicate cell membrane bordering the synspermatid. Note tubular invaginations at the cell peripheriy. Three acrosomal vacuoles (black arrows) and parts of acrosomal filaments are also seen. The nuclei, at the beginning of chromatin condensation, still have a nuclear envelope (arrowheads). Scale bar: 1 µm. (e) – Distal part of testis with large synspermatid. Two much condensed chromatin bodies are seen. Scale bar: 5 µm.
FIGURE 1 in Fine Structure Of The Male Genital Systems, Spermatophores And Unusual Sperm Cells Of Saxidromidae (Acari, Actinotrichida)
FIGURE 1: Light micrographs of transverse sections through the posterior part of the idiosoma of Rhinodromus lootsi. (a) – Shortly in front of the genital opening. The two vasa deferentia located below the midgut are seen containing several synspermia. (b) – Slightly posterior, the genital opening is appearing. The vasa deferentia are connected by a transverse bridge (asterisk indicates a shrinkage artifact). (c) – More posteriorly, the ejaculatory duct with its dorsal chamber appears (asterisk indicates artifact). (d) – The paired testis are seen consisting of germinal and glandular parts. The dorsomedian excretory organ (i.e. the postcolon; e.g., Alberti and Coons 1999) is seen. Note that all parts of the genital system are located ventral of the digestive system. Scale bar: 50 µm.
FIGURE 6 in Fine Structure Of The Male Genital Systems, Spermatophores And Unusual Sperm Cells Of Saxidromidae (Acari, Actinotrichida)
FIGURE 6: Comparison of mating by Saxidromus delamarei and Rhinodromus lootsi and their corresponding spermatophores as seen in TEM (that of Rh. lootsi partially reconstructed; a, d from Coineau et al., 2006, b from Alberti et al., 2007). (a) – Some details of the mating sequence from above to below: S. delamarei male (black) has captured a female with its forelegs and deposits a rather large spermatophore (arrow). The male then turns round and impales the female onto the spermatophore. The spermatophore almost fills the "entire" female. The male has to separate the upper part of the spermatophore (which is more or less in the female) from the lower part which is attached to the ground. (b) – Longitudinal section of spermatophore of S. delamarei. Note the considerable amount of secretion forming the spermatophore and the rather small sperm chamber containing dense secretion and many synspermia. (c) – Spermatophore of Rh. lootsi drawn to same scale as that of S. delamarei. The head is (largely) represented by one synspermium. Stalk added schematically. Scale bar for b and c: 50 µm. (d) – Mating sequence seen in Rh. lootsi. Note that the spermatophore (arrow) produced by the male is considerably smaller bearing a very small head (i.e., mainly the synspermium). The male can use the same stalk several times depositing further synspermia on it. The male inserts its dorsoanteriad protruding processus into the female's genital opening prior to spermatophore deposition (not shown; see Coineau et al., 2006 for more details).
FIGURE 5 in Fine Structure Of The Male Genital Systems, Spermatophores And Unusual Sperm Cells Of Saxidromidae (Acari, Actinotrichida)
FIGURE 5: See next page
Figure 7 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 7 - Nannodromus reveilleti gen. n., sp. n. Female. A dorsal view B ventral view. Scale bar: A, B = 200 μm.
Figure 4 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 4 - Nannodromus reveilleti gen. n., sp. n. A, B Male C Female A anterior region with antiaxial view of right chelicera B left chelicera, paraxial view C left chelicera, paraxial view. Scale bar: A, B, C = 100 μm.
Figure 12 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 12 - Nannodromus reveilleti gen. n. sp. n. Female Legs IV A, B dorsal view C, D lateral view. Scale bar: A, B = 70 μm; C–D = 40 μm.
Figure 1 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 1 - Nannodromus reveilleti gen. n., sp. n. Male. A dorsal view B ventral view. Scale bar: A, B = 130 μm.
Figure 3 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 3 - Nannodromus reveilleti gen. n., sp. n. A+C male B+D female A frontal view (LM observation) B frontal view (SEM observation) C chelicerae left (SEM observation), paraxial view D chelicerae (SEM observation), inferior and superior digits. Scale bar: A, B, C = 50 μm; D = 10 μm.
Figure 11 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 11 - Nannodromus reveilleti gen. n., sp. n. Female. Legs I A, B dorsal view C, D lateral view. Scale bar: A, B = 100 μm; C–D = 50 μm.
Figure 6 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 6 - Nannodromus reveilleti gen. n., sp. n. Leg I. Male A tarsus I lateral left paraxial view B tarsus I dorsal view C genu, lateral view D tibia lateral left paraxial view E tibia, detail, paraxial left F tibia left dorsal view. Scale bar: A, B = 10 μm; C = 20 μm; D = 20 μm, E = 10 μm; F = 20 μm.
Figure 5 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 5 - Nannodromus reveilleti gen. n., sp. n. Male. Leg I A dorsal view B lateral view, distal paraxial segments C lateral view tarsus I, paraxial. Scale bar: A, B = 100 μm; A', C' = 50 μm.
Figure 2 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 2 - Nannodromus reveilleti gen. n., sp. n. Male. A dorsal view B frontal view C lateral view aspidosoma, anterior part D–E Prodorsal paired processes, details. Scale bar: A = 200 μm; B = 50 μm; C = 20 μm; D = 10 μm; E = 10 μm.
Figure 9 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 9 - Nannodromus reveilleti gen. n., sp. n. Female. A anterior eye, cornea B microsculpture, zone surrounding po setae C lyrifissure, ia D lyrifissure im E, F microsculpture around ocular zone. Scale bar: A = 5 μm; B = 20 μm; C, D = 20 μm; E = 10 μm; F = 10 μm.
Figure 8 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 8 - Nannodromus reveilleti gen. n., sp. n. Female. A dorsal view B trichobothrium C microsculpture depressed area D the two left eyes: the anterior normal with a convex cornea, the posterior regressed or modified and probably dedicated to another function. Scale bar: A = 200 μm; B = 10 μm; C = 20 μm; D = 30 μm.
Figure 10 from: Fernandez N, Coineau Y, Theron P, Tiedt L (2014) Nannodromus reveilleti (Acari, Anystida, Saxidromidae) a new genus and species from South Africa. ZooKeys 378: 17-39. https://doi.org/10.3897/zookeys.378.6753
Figure 10 - Nannodromus reveilleti gen. n., sp. n. Female/Male. A posterior view, female B posterior view, male C female, genito-anal zone D legs IV, female, view from above, several setae are lost E female, anterior zone tarsus I. Scale bar: A = 50 μm B = 70 μm; C = 50 μm; D = 100 μm; E = 40 μm, F = 10 μm.
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