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Francke Oscar - One of the best experts on this subject based on the ideXlab platform.
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Figures 46-47 from: Valdez Mondragon A, Mendoza J, Francke O (2014) First record of the mygalomorph spider family Paratropididae (Arachnida, Araneae) in North America with the description of a new species of Paratropis Simon from Mexico, and with new ultramorphological data for the family. ZooKeys 416: 1-21. https://doi.org/10.3897/zookeys.416.7253
2014Co-Authors: Valdez Mondragon Alejandro, Mendoza Jorge, Francke OscarAbstract:Figures 46-47 - Paratropis tuxtlensis sp. n. Trichobothria on male appendages 46 Trichobothria pattern on tibiae of palp (Pa) and legs I-IV 47 Trichobothria pattern on metatarsi I-IV
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Figures 14-21 from: Valdez Mondragon A, Mendoza J, Francke O (2014) First record of the mygalomorph spider family Paratropididae (Arachnida, Araneae) in North America with the description of a new species of Paratropis Simon from Mexico, and with new ultramorphological data for the family. ZooKeys 416: 1-21. https://doi.org/10.3897/zookeys.416.7253
2014Co-Authors: Valdez Mondragon Alejandro, Mendoza Jorge, Francke OscarAbstract:Figures 14-21 - Paratropis tuxtlensis sp. n. Male 14 Left palp, prolateral view 15 Left palp, detail of bulb and embolus, prolateral view 16 Detail of the embolus opening, distal view 17 Left palp tibia, dorsal-retrolateral view (arrows indicate the Trichobothria) 18 Detail of the Trichobothria sockets on the palp tibia 19 Left palp, tibia and tarsus, prolateral view 20 Left palp, tibia and tarsus, retrolateral view (arrows indicate the Trichobothria) 21 Detail of the setae on tarsus of left palp, prolateral view. Scales: 10 µm (Figure 16), 100 µm (Figure 18), 200 µm (Figure 21), 500 µm (Figures 15, 17, 19, 20), 1 mm (Figure 14)
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Figures 48 from: Valdez Mondragon A, Mendoza J, Francke O (2014) First record of the mygalomorph spider family Paratropididae (Arachnida, Araneae) in North America with the description of a new species of Paratropis Simon from Mexico, and with new ultramorphological data for the family. ZooKeys 416: 1-21. https://doi.org/10.3897/zookeys.416.7253
2014Co-Authors: Valdez Mondragon Alejandro, Mendoza Jorge, Francke OscarAbstract:Figures 48 - Paratropis tuxtlensis sp. n. Trichobothria pattern on tarsi I-IV on male legs
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First record of the mygalomorph spider family Paratropididae (Arachnida, Araneae) in North America with the description of a new species of Paratropis Simon from Mexico, and with new ultramorphological data for the family
2014Co-Authors: Valdez Mondragon Alejandro, Mendoza Jorge, Francke OscarAbstract:A new species of the genus Paratropis is described from North America: Paratropis tuxtlensis sp. n., from a tropical rainforest in Veracruz, Mexico. This is the fifth Paratropis and the tenth paratropidid species described and the first North American record of this Neotropical family. The species is described based on adult males and females, and juveniles. The juveniles show ontogenetic variation in the number of cuspules on the labium and endites, and in the number and position of leg Trichobothria. This is the second Paratropis species, and the third paratropidid known from both sexes. The scanning electron photographs (SEM) reveal new morphological data and contribute to the knowledge of the famil
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Figures 22-29 from: Valdez Mondragon A, Mendoza J, Francke O (2014) First record of the mygalomorph spider family Paratropididae (Arachnida, Araneae) in North America with the description of a new species of Paratropis Simon from Mexico, and with new ultramorphological data for the family. ZooKeys 416: 1-21. https://doi.org/10.3897/zookeys.416.7253
2014Co-Authors: Valdez Mondragon Alejandro, Mendoza Jorge, Francke OscarAbstract:Figures 22-29 - Paratropis tuxtlensis sp. n. Male. 22 Left endite, dorsal view 23 Left endite, apical detail 24 Left endite, detail of the setae 25 Detail of the finger-shaped cuspules on endite 26 Detail of the setae on retrolateral region of left endite 27 Left leg I, dorsal view of the tarsus 28 Left tarsus I, detail of the Trichobothria sockets (arrows indicate the cuticular pores) 29 Detail of the glandular pore on the surface of the tarsus. Scales: 10 µm (Figure 29), 50 µm (Figure 25), 100 µm (Figure 26), 200 µm (Figure 28), 300 µm (Figure 24), 400 µm (Figure 23), 500 µm (Figure 27), 1 mm (Figure 22)
Lorenzo Prendini - One of the best experts on this subject based on the ideXlab platform.
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FIgS. 18–19. Urodacus butleri, n. sp., holotype ♂ (WAM T85141), dextral pedipalp chela manus, illustrating distribution of Trichobothria (open circles). 18. External aspect. 19. Ventral aspect. Scale bar = 0.5 mm. Abbreviations: Db, dorsal basal; Dt, dorsal terminal; Est, external subter- minal; Et, external terminal; V, ventral.
2018Co-Authors: Erich S Volschenk, Mark S. Harvey, Lorenzo PrendiniAbstract:FIgS. 18–19. Urodacus butleri, n. sp., holotype ♂ (WAM T85141), dextral pedipalp chela manus, illustrating distribution of Trichobothria (open circles). 18. External aspect. 19. Ventral aspect. Scale bar = 0.5 mm. Abbreviations: Db, dorsal basal; Dt, dorsal terminal; Est, external subter- minal; Et, external terminal; V, ventral
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FIgS. 15–17. Urodacus butleri, n. sp., holotype ♂ (WAM T85141), dextral pedipalp patella, illustrating distribution of Trichobothria (open circles). 15. Dorsal aspect. 16. External aspect. 17. Ventral aspect. Scale bar = 0.5 mm.
2018Co-Authors: Erich S Volschenk, Mark S. Harvey, Lorenzo PrendiniAbstract:FIgS. 15–17. Urodacus butleri, n. sp., holotype ♂ (WAM T85141), dextral pedipalp patella, illustrating distribution of Trichobothria (open circles). 15. Dorsal aspect. 16. External aspect. 17. Ventral aspect. Scale bar = 0.5 mm
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a living fossil from central asia the morphology of pseudochactas ovchinnikovi gromov 1998 scorpiones pseudochactidae with comments on its phylogenetic position
Zoologischer Anzeiger – A Journal of Comparative Zoology, 2006Co-Authors: Lorenzo Prendini, Erich S Volschenk, Samara Maaliki, Alexander V GromovAbstract:Pseudochactas ovchinnikovi Gromov, 1998, arguably the most remarkable scorpion discovered during the last century, inhabits an isolated, mountainous region of southeastern Uzbekistan and southwestern Tajikistan, Central Asia. This scorpion displays several morphological characters unique among Recent (extant) scorpions, including a unique Trichobothrial pattern and a mixture of other characters, some potentially synapomorphic with Buthidae C.L. Koch, 1837, others with the nonbuthid scorpion families, particularly Chaerilidae Pocock, 1893. Consequently, a monotypic family, Pseudochactidae Gromov, 1998 was created to accommodate it. Although there is widespread agreement that Pseudochactas Gromov, 1998 is basal within Recent scorpions, its precise phylogenetic position remains a matter of debate. Three competing hypotheses have been proposed to account for its position: (1) sister group of all Recent scorpions; (2) sister group of Buthidae; (3) sister group of Chaerilidae. Despite the importance of Pseudochactas in determining the basal relationships among Recent scorpions, several important character systems, including the hemispermatophore and the ovariuterus, have not yet been studied in the genus. There are also several misconceptions regarding some of the character systems (e.g., Trichobothria and carinae) that have been studied. In this contribution, we provide a detailed, fully illustrated reexamination of the morphology of Pseudochactas, including the first descriptions of its hemispermatophore, ovariuterus, and pectinal peg sensillae. We discuss the implications of these and other characters for the phylogenetic position of this ‘living fossil’ and conclude that Hypothesis 2, sister group of Buthidae, is the most plausible of the alternatives, all of which await further testing in a rigorous phylogenetic analysis. r 2006 Elsevier GmbH. All rights reserved.
Bergsten Johannes - One of the best experts on this subject based on the ideXlab platform.
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Figure 15 from: Fossen EI, Ekrem T, Nilsson AN, Bergsten J (2016) Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). ZooKeys 564: 71-120. https://doi.org/10.3897/zookeys.564.6558
2016Co-Authors: Fossen Erlend, Ekrem Torbjørn, Nilsson Anders, Bergsten JohannesAbstract:Figure 15 - Comparison of the relative position of Trichobothria (red arrows) on the elytra of Hydrobius. A Trichobothria positioned in the intervals between the 2nd and 3rd row of serial punctures, and between the 4th and 5th row. Typical positioning of Trichobothria in Hydrobius arcticus, Hydrobius fuscipes fuscipes and Hydrobius fuscipes subrotundus, here represented by a specimen of Hydrobius fuscipes fuscipes B Trichobothria positioned in or very close to the 3rd and 5th row of serial punctures, which is characteristic of Hydrobius fuscipes rottenbergii
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Figure 2 from: Fossen EI, Ekrem T, Nilsson AN, Bergsten J (2016) Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). ZooKeys 564: 71-120. https://doi.org/10.3897/zookeys.564.6558
2016Co-Authors: Fossen Erlend, Ekrem Torbjørn, Nilsson Anders, Bergsten JohannesAbstract:Figure 2 - Measurement of the relative position of Trichobothria on the elytra (character 2.1). Dorsal view of anterior part of the elytra, showing how several Trichobothria encountered posterior to the scutellum were measured. Each relative position of a trichobothrium was measured by dividing the length from the 3rd row of serial punctures to the trichobothrium (a) by the length from the 3rd row to the 2nd row (a+b). The same was done with Trichobothria in or near the 5th row of serial punctures. Image of Hydrobius fuscipes fuscipes
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Figure 13 from: Fossen EI, Ekrem T, Nilsson AN, Bergsten J (2016) Species delimitation in northern European water scavenger beetles of the genus Hydrobius (Coleoptera, Hydrophilidae). ZooKeys 564: 71-120. https://doi.org/10.3897/zookeys.564.6558
2016Co-Authors: Fossen Erlend, Ekrem Torbjørn, Nilsson Anders, Bergsten JohannesAbstract:Figure 13 - Box- and whisker-plot showing morphometric differences between morphotypes of Hydrobius. Top and bottom of boxes represent first and third quartile; dark bands represent the second quartile (median); whiskers show the maximum and minimum values not including outliers (white points). a Shape of mesoventral process. Hydrobius arcticus is the only morphotype with a blunt process (indicated by the higher values) b Relative position of Trichobothria in relation to the 3rd and 5th row of elytral serial punctures. The Trichobothria of Hydrobius fuscipes rottenbergii are positioned closer to the serial punctures than in other morphotypes (indicated by lower values)
Valdez Mondragon Alejandro - One of the best experts on this subject based on the ideXlab platform.
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Figures 46-47 from: Valdez Mondragon A, Mendoza J, Francke O (2014) First record of the mygalomorph spider family Paratropididae (Arachnida, Araneae) in North America with the description of a new species of Paratropis Simon from Mexico, and with new ultramorphological data for the family. ZooKeys 416: 1-21. https://doi.org/10.3897/zookeys.416.7253
2014Co-Authors: Valdez Mondragon Alejandro, Mendoza Jorge, Francke OscarAbstract:Figures 46-47 - Paratropis tuxtlensis sp. n. Trichobothria on male appendages 46 Trichobothria pattern on tibiae of palp (Pa) and legs I-IV 47 Trichobothria pattern on metatarsi I-IV
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Figures 14-21 from: Valdez Mondragon A, Mendoza J, Francke O (2014) First record of the mygalomorph spider family Paratropididae (Arachnida, Araneae) in North America with the description of a new species of Paratropis Simon from Mexico, and with new ultramorphological data for the family. ZooKeys 416: 1-21. https://doi.org/10.3897/zookeys.416.7253
2014Co-Authors: Valdez Mondragon Alejandro, Mendoza Jorge, Francke OscarAbstract:Figures 14-21 - Paratropis tuxtlensis sp. n. Male 14 Left palp, prolateral view 15 Left palp, detail of bulb and embolus, prolateral view 16 Detail of the embolus opening, distal view 17 Left palp tibia, dorsal-retrolateral view (arrows indicate the Trichobothria) 18 Detail of the Trichobothria sockets on the palp tibia 19 Left palp, tibia and tarsus, prolateral view 20 Left palp, tibia and tarsus, retrolateral view (arrows indicate the Trichobothria) 21 Detail of the setae on tarsus of left palp, prolateral view. Scales: 10 µm (Figure 16), 100 µm (Figure 18), 200 µm (Figure 21), 500 µm (Figures 15, 17, 19, 20), 1 mm (Figure 14)
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Figures 48 from: Valdez Mondragon A, Mendoza J, Francke O (2014) First record of the mygalomorph spider family Paratropididae (Arachnida, Araneae) in North America with the description of a new species of Paratropis Simon from Mexico, and with new ultramorphological data for the family. ZooKeys 416: 1-21. https://doi.org/10.3897/zookeys.416.7253
2014Co-Authors: Valdez Mondragon Alejandro, Mendoza Jorge, Francke OscarAbstract:Figures 48 - Paratropis tuxtlensis sp. n. Trichobothria pattern on tarsi I-IV on male legs
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First record of the mygalomorph spider family Paratropididae (Arachnida, Araneae) in North America with the description of a new species of Paratropis Simon from Mexico, and with new ultramorphological data for the family
2014Co-Authors: Valdez Mondragon Alejandro, Mendoza Jorge, Francke OscarAbstract:A new species of the genus Paratropis is described from North America: Paratropis tuxtlensis sp. n., from a tropical rainforest in Veracruz, Mexico. This is the fifth Paratropis and the tenth paratropidid species described and the first North American record of this Neotropical family. The species is described based on adult males and females, and juveniles. The juveniles show ontogenetic variation in the number of cuspules on the labium and endites, and in the number and position of leg Trichobothria. This is the second Paratropis species, and the third paratropidid known from both sexes. The scanning electron photographs (SEM) reveal new morphological data and contribute to the knowledge of the famil
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Figures 22-29 from: Valdez Mondragon A, Mendoza J, Francke O (2014) First record of the mygalomorph spider family Paratropididae (Arachnida, Araneae) in North America with the description of a new species of Paratropis Simon from Mexico, and with new ultramorphological data for the family. ZooKeys 416: 1-21. https://doi.org/10.3897/zookeys.416.7253
2014Co-Authors: Valdez Mondragon Alejandro, Mendoza Jorge, Francke OscarAbstract:Figures 22-29 - Paratropis tuxtlensis sp. n. Male. 22 Left endite, dorsal view 23 Left endite, apical detail 24 Left endite, detail of the setae 25 Detail of the finger-shaped cuspules on endite 26 Detail of the setae on retrolateral region of left endite 27 Left leg I, dorsal view of the tarsus 28 Left tarsus I, detail of the Trichobothria sockets (arrows indicate the cuticular pores) 29 Detail of the glandular pore on the surface of the tarsus. Scales: 10 µm (Figure 29), 50 µm (Figure 25), 100 µm (Figure 26), 200 µm (Figure 28), 300 µm (Figure 24), 400 µm (Figure 23), 500 µm (Figure 27), 1 mm (Figure 22)
Erich S Volschenk - One of the best experts on this subject based on the ideXlab platform.
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FIgS. 18–19. Urodacus butleri, n. sp., holotype ♂ (WAM T85141), dextral pedipalp chela manus, illustrating distribution of Trichobothria (open circles). 18. External aspect. 19. Ventral aspect. Scale bar = 0.5 mm. Abbreviations: Db, dorsal basal; Dt, dorsal terminal; Est, external subter- minal; Et, external terminal; V, ventral.
2018Co-Authors: Erich S Volschenk, Mark S. Harvey, Lorenzo PrendiniAbstract:FIgS. 18–19. Urodacus butleri, n. sp., holotype ♂ (WAM T85141), dextral pedipalp chela manus, illustrating distribution of Trichobothria (open circles). 18. External aspect. 19. Ventral aspect. Scale bar = 0.5 mm. Abbreviations: Db, dorsal basal; Dt, dorsal terminal; Est, external subter- minal; Et, external terminal; V, ventral
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FIgS. 15–17. Urodacus butleri, n. sp., holotype ♂ (WAM T85141), dextral pedipalp patella, illustrating distribution of Trichobothria (open circles). 15. Dorsal aspect. 16. External aspect. 17. Ventral aspect. Scale bar = 0.5 mm.
2018Co-Authors: Erich S Volschenk, Mark S. Harvey, Lorenzo PrendiniAbstract:FIgS. 15–17. Urodacus butleri, n. sp., holotype ♂ (WAM T85141), dextral pedipalp patella, illustrating distribution of Trichobothria (open circles). 15. Dorsal aspect. 16. External aspect. 17. Ventral aspect. Scale bar = 0.5 mm
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a living fossil from central asia the morphology of pseudochactas ovchinnikovi gromov 1998 scorpiones pseudochactidae with comments on its phylogenetic position
Zoologischer Anzeiger – A Journal of Comparative Zoology, 2006Co-Authors: Lorenzo Prendini, Erich S Volschenk, Samara Maaliki, Alexander V GromovAbstract:Pseudochactas ovchinnikovi Gromov, 1998, arguably the most remarkable scorpion discovered during the last century, inhabits an isolated, mountainous region of southeastern Uzbekistan and southwestern Tajikistan, Central Asia. This scorpion displays several morphological characters unique among Recent (extant) scorpions, including a unique Trichobothrial pattern and a mixture of other characters, some potentially synapomorphic with Buthidae C.L. Koch, 1837, others with the nonbuthid scorpion families, particularly Chaerilidae Pocock, 1893. Consequently, a monotypic family, Pseudochactidae Gromov, 1998 was created to accommodate it. Although there is widespread agreement that Pseudochactas Gromov, 1998 is basal within Recent scorpions, its precise phylogenetic position remains a matter of debate. Three competing hypotheses have been proposed to account for its position: (1) sister group of all Recent scorpions; (2) sister group of Buthidae; (3) sister group of Chaerilidae. Despite the importance of Pseudochactas in determining the basal relationships among Recent scorpions, several important character systems, including the hemispermatophore and the ovariuterus, have not yet been studied in the genus. There are also several misconceptions regarding some of the character systems (e.g., Trichobothria and carinae) that have been studied. In this contribution, we provide a detailed, fully illustrated reexamination of the morphology of Pseudochactas, including the first descriptions of its hemispermatophore, ovariuterus, and pectinal peg sensillae. We discuss the implications of these and other characters for the phylogenetic position of this ‘living fossil’ and conclude that Hypothesis 2, sister group of Buthidae, is the most plausible of the alternatives, all of which await further testing in a rigorous phylogenetic analysis. r 2006 Elsevier GmbH. All rights reserved.
