The Experts below are selected from a list of 510 Experts worldwide ranked by ideXlab platform
John J Mcdermott - One of the best experts on this subject based on the ideXlab platform.
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observations on feeding in a south african Suctorial hoplonemertean nipponnemertes sp family cratenemertidae
Hydrobiologia, 1997Co-Authors: John J McdermottAbstract:Marine hoplonemerteans were collected intertidally inAlgoa Bay, Port Elizabeth, South Africa in 1983.Algoa Living worms appear to belong to the genus Nipponnemertes, perhaps N. africanus (Wheeler, 1940). The external morphology and thestylet apparatus are described and illustrated. Laboratory observations showed that this speciesattacked and consumed two species of sympatricamphipods, Elasmopus pectenicrus and Hyalegrandicornis (the only two species tested). Thefeeding behavior was similar to that documented forother Suctorial nemerteans that feed on amphipods. Onecomplete feeding sequence, from the initial strike tocompletion of feeding on H. grandicornis,took approximately 12 min: the proboscis struck theventral side of the amphipod, which was immobilized in<1 min; the head eventually wedged between thesternal plates, and the internal organs were evacuatedby Suctorial action. The addition of E. pectenicrus andH. grandicornis as potentialprey for Suctorial hoplonemerteans brings the totalknown number of amphipod species to 25, involving atleast ten families. A summary of all species ofAmphipoda known to be potential prey for Suctorialhoplonemerteans is presented.
Kathe R. Jensen - One of the best experts on this subject based on the ideXlab platform.
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Evolution of the Sacoglossa (Mollusca, Opisthobranchia) and the ecological associations with their food plants
Evolutionary Ecology, 1997Co-Authors: Kathe R. JensenAbstract:Evolution in the opisthobranch order Sacoglossa has been closely linked to their specialized Suctorial herbivorous habits. All shelled Sacoglossa (about 20% of the species) feed on one algal genus, Caulerpa. The non-shelled Sacoglossa have 'radiated' to other diets, mainly siphonalean or septate green algae (Class Ulvophyceae). Comparing the phylogeny of sacoglossan genera with the phylogeny of the Ulvophyceae indicates that co-speciation may have taken place at the basal node of the Sacoglossa, and that host switching has taken place several times in the two non-shelled clades. It is suggested that the most important evolutionary process has been speciation by 'resource-tracking'; the resource tracked is most probably cell wall composition of the algal prey. The fossil record of extant sacoglossan genera dates back to the Eocene and, based on the fossil record of siphonalean green algae, the Sacoglossa most likely appeared in the Cretaceous. It is hypothesized that the ancestral sacoglossan was epifaunal, Suctorial and herbivorous, and the 'ancestral' food plant was not Caulerpa, but filamentous, calcified, now extinct, Udoteaceae.
Paula E. Cushing - One of the best experts on this subject based on the ideXlab platform.
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The anatomy and ultrastructure of the Suctorial organ of Solifugae (Arachnida).
Arthropod Structure & Development, 2008Co-Authors: A.e. Klann, A.v. Gromov, Paula E. Cushing, Alfredo V. Peretti, Gerd AlbertiAbstract:Solifugae possess an evertable, adhesive pedipalpal organ (Suctorial organ) at the tip of the distal tarsus of each pedipalp that is unique among arachnids. When inverted inside the pedipalp, the Suctorial organ is covered with two cuticular lips, a dorsal upper lip and a ventral lower lip, but it can be protruded rapidly in order to facilitate grasping prey or climbing on bushes or even climbing on smooth surfaces due to its remarkable adhesive properties. In this study, the Suctorial organs of different species from old world families Galeodidae and Karschiidae and new world families Ammotrechidae and Eremobatidae were investigated by means of light microscopy, scanning and transmission electron microscopy. In all representatives, the Suctorial organ is formed by an evertable, cuticular pad with a complex internal stabilizing structure. The procuticle of this pad consists of a lattice-like basal plate and numerous stalked structures connected to this basal plate. The shafts of the stalked structures are regularly organized and ramify apically. The surface of the Suctorial organ is constituted of a very thin epicuticle overlaying the ramifying apices forming ridges and furrows on the ventral side of the Suctorial organ.
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The Suctorial organ of the Solifugae (Arachnida, Solifugae)
Arthropod Structure & Development, 2005Co-Authors: Paula E. Cushing, Jack O. Brookhart, Hans-joachim Kleebe, Gary Zito, Peter PayneAbstract:The ability of members of the arachnid order Solifugae to climb smooth, vertical surfaces and the organs involved in this behavior are investigated. Macroscopic, microscopic, and scanning electron microscopic observations are made of a palpal organ called the Suctorial organ. Observations of the behavior but not the microstructure have been made in the past. Histological examination illustrates the internal gross anatomy of this structure and scanning electron microscopy demonstrates the fine structure in adults of four genera: Eremobates (Eremobatidae), Eremochelis (Eremobatidae), Eremorhax (Eremobatidae), Ammotrechula (Ammotrechidae), as well as an unidentified late stage immature and third stage instar. The Suctorial organ is most likely primarily used for prey capture in the wild. q 2005 Elsevier Ltd. All rights reserved.
Gerd Alberti - One of the best experts on this subject based on the ideXlab platform.
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The anatomy and ultrastructure of the Suctorial organ of Solifugae (Arachnida).
Arthropod Structure & Development, 2008Co-Authors: A.e. Klann, A.v. Gromov, Paula E. Cushing, Alfredo V. Peretti, Gerd AlbertiAbstract:Solifugae possess an evertable, adhesive pedipalpal organ (Suctorial organ) at the tip of the distal tarsus of each pedipalp that is unique among arachnids. When inverted inside the pedipalp, the Suctorial organ is covered with two cuticular lips, a dorsal upper lip and a ventral lower lip, but it can be protruded rapidly in order to facilitate grasping prey or climbing on bushes or even climbing on smooth surfaces due to its remarkable adhesive properties. In this study, the Suctorial organs of different species from old world families Galeodidae and Karschiidae and new world families Ammotrechidae and Eremobatidae were investigated by means of light microscopy, scanning and transmission electron microscopy. In all representatives, the Suctorial organ is formed by an evertable, cuticular pad with a complex internal stabilizing structure. The procuticle of this pad consists of a lattice-like basal plate and numerous stalked structures connected to this basal plate. The shafts of the stalked structures are regularly organized and ramify apically. The surface of the Suctorial organ is constituted of a very thin epicuticle overlaying the ramifying apices forming ridges and furrows on the ventral side of the Suctorial organ.
Peter Payne - One of the best experts on this subject based on the ideXlab platform.
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The Suctorial organ of the Solifugae (Arachnida, Solifugae)
Arthropod Structure & Development, 2005Co-Authors: Paula E. Cushing, Jack O. Brookhart, Hans-joachim Kleebe, Gary Zito, Peter PayneAbstract:The ability of members of the arachnid order Solifugae to climb smooth, vertical surfaces and the organs involved in this behavior are investigated. Macroscopic, microscopic, and scanning electron microscopic observations are made of a palpal organ called the Suctorial organ. Observations of the behavior but not the microstructure have been made in the past. Histological examination illustrates the internal gross anatomy of this structure and scanning electron microscopy demonstrates the fine structure in adults of four genera: Eremobates (Eremobatidae), Eremochelis (Eremobatidae), Eremorhax (Eremobatidae), Ammotrechula (Ammotrechidae), as well as an unidentified late stage immature and third stage instar. The Suctorial organ is most likely primarily used for prey capture in the wild. q 2005 Elsevier Ltd. All rights reserved.
