... Gebrauch dieses Terminus in der Vergangenheit erkennen. Das Telson ist ein terminaler Korperteil, welcher angegliedert ist an ... oder Oberflachendornen tragen. Der Anus endet an der Telson-basis (primitiv) oder an seiner ventralen Oberflache, aber ... Crustacea wird das terminale oder anale Somit falschlicherweise Telson genannt und seine Anhange, die Uropoden, irrtumlicherweise als ... Solche Crustacea (z.B. Hutchinsoniella, Nebalia) besitzen kein Telson und haben ein abdominales Somit mehr als ihnen ... Gebrauch dieses Terminus in der Vergangenheit erkennen. Das Telson ist ein terminaler Korperteil, welcher angegliedert ist an ...
Tópico(s): Crustacean biology and ecology
1971 - Brill | Crustaceana
... Arbeit nimmt zu Bowmans Ausfuhrungen (1971) uber das Telson der Crustacea Stellung. Es wird seiner Auffassung entgegengetreten, nach der die Definition des Telsons eine terminale Lage des Afters ausschliest. Entgegen Bowmans Darstellung ist eine solche Lage vielmehr fur das Telson der Thermosbaenacea, Spelaeogriphacea, Stygocarididae und Bathynellacea kennzeichnend. Auch ... Afteroffnung wird als nebensachlich fur die Definition des Telsons angesehen, zumal Verlagerungen nicht nur von anderen Tiergruppen ...
Tópico(s): Crustacean biology and ecology
1976 - Brill | Crustaceana
J. P. C. Dumont, Jeffrey J. Wine,
... describe the phasic neuromuscular system of the crayfish telson and establish its homology with the abdominal flexor ... stroke for tailflip escape responses. Three paired phasic telson muscles are innervated by 11 paired neurones which ... sixth nerve. These are the posterior and ventral telson flexors and the anterior telson muscle. Studies of embryonic ganglia provide evidence that ... homologous with the segmental ganglia. Two of the telson flexor motor neurones are homologues of the single ... depression of the neuromuscular synapse. Two of the telson flexor neurones are homologues of the single flexor ...
Tópico(s): Neuroscience and Neural Engineering
1987 - The Company of Biologists | Journal of Experimental Biology
J. P. C. Dumont, Jeffrey J. Wine,
ABSTRACT The telson flexor system is homologous to the fast flexor system of anterior ganglia (Dumont & Wine, 1986a), but important differences exist in connections to the telson motor giants (MoGs) (Dumont & Wine, 1986b). In this ... we describe additional differences in connections to the telson non-giant fast flexor (FF) motor neurones and to the telson flexor inhibitor (FI). The telson FF motor neurones in ganglion 6 (G6) receive ... in common provide weak disynaptic input via the telson segmental giant (SG6), and relatively strong tri-synaptic ...
Tópico(s): Neural dynamics and brain function
1987 - The Company of Biologists | Journal of Experimental Biology
J. P. C. Dumont, Jeffrey J. Wine,
ABSTRACT The telson and sixth ganglion of the crayfish contain a fast flexor system that is homologous to that found in ... connections to the motor giants (MoGs) in the telson as compared to the MoGs in the anterior ... segments. Unlike their homologues in anterior segments, the telson MoGs receive excitatory input via a trisynaptic pathway ... activation of the two I3s alone fires the telson MoGs. The trisynaptic pathway from the LGs to the telson MoGs is inhibited by central, command-derived, postsynaptic ...
Tópico(s): Zebrafish Biomedical Research Applications
1987 - The Company of Biologists | Journal of Experimental Biology
Jennifer R. A. Taylor, S. N. Patek,
... mechanical impact properties of the mantis shrimp's telson, a piece of abdominal armor that withstands repeated, ... of restitution, an index of elasticity, of the telson and compared it with that of an adjacent ... that is not impacted. We found that the telson behaves more like an inelastic punching bag than ... segment provides no mechanical correlates with size, the telson's coefficient of restitution, displacement and impact duration all correlate with body size. The telson's mineralization patterns were determined through micro-CT ( ...
Tópico(s): Sports Dynamics and Biomechanics
2010 - The Company of Biologists | Journal of Experimental Biology
Özcan Özkan, S. Adigüzel, S. Yakistiran, Ayhan Filazı,
... the production of antivenom by using Androctonus crassicauda telsons. Venom toxicity is related to telson weight, size, and storing condition (open or closed). Telsons of A. crassicauda were collected in Southeastern Anatolia ( ... b). Venom solution was prepared by maceration of telsons. Swiss albino mice were used to determine the ... Group 3b - 6.88mg. Among the groups of telsons, the first and the second groups showed different ... In the third group, a fourfold amount of telsons was used for toxicity. In other words, telsons ...
Tópico(s): Nicotinic Acetylcholine Receptors Study
2006 - BioMed Central | The Journal of venomous animals and toxins including tropical diseases
Jennifer R. A. Taylor, Nina I. Scott, Greg W. Rouse,
... resistant armour that clash during ritualized combat. The telson is one of few biological structures known to ... and weapon is associated with the evolution of telson sparring. We carried out a comparative analysis of telson impact mechanics across 15 mantis shrimp species to assess if the telsons of sparring species (i) are consistently specialized for ... data from ball drop tests show that the telsons of all species function like a stiff spring ... mantis shrimp do not appear to have coevolved telson armour that is more robust to impact than ...
Tópico(s): Turtle Biology and Conservation
2019 - Royal Society | Journal of The Royal Society Interface
D. H. Paul, ALEXANDER M. THEN, David S.K. Magnuson,
The neuromusculature in the telsons of three macrurans (Pandalus platycerus, Procambarus clarkii, Upogebia pugettensis) and three anomurans (Munida quadrispina, Blepharipoda occidentalis, Emerita analoga) are compared ... of these decapods. The stereotypical arrangement in macruran telsons comprises a group of massive axial muscles and ... appendage muscles (Fig. 1). The various arrangements of telson neuromusculature in the anomurans (Fig. 3) are interpreted ... Homologies among muscles and nerve roots in the telsons of the six decapods are identified (Figs. 1, ...
Tópico(s): Crustacean biology and ecology
1985 - Marine Biological Laboratory (MBL) | Biological Bulletin
Lanxia Meng, Yonghui Zhao, Da‐Liang Qu, Zili Xie, Xingchen Guo, Zhanyong Zhu, Zongyun Chen, Longhua Zhang, Wenxin Li, Zhijian Cao, Changlin Tian, Yingliang Wu,
... number of scorpion fossils indicate that the venomous telson developed from the sharp telson in sea scorpions into the extant scorpion-like telson in aquatic scorpions in the Paleozoic Era and ... were adapted to the emergence of the scorpion telson from the sharp telson of sea scorpions into the extant scorpion-like telson in aquatic scorpions in the Paleozoic Era.
Tópico(s): Invertebrate Immune Response Mechanisms
2020 - Elsevier BV | International Journal of Biological Macromolecules
Nicholas A. Yaraghi, Adwait A. Trikanad, David Restrepo, Wei Huang, Jesus Rivera, Steven Herrera, Mikhail Zhernenkov, Dilworth Y. Parkinson, Roy L. Caldwell, Pablo Zavattieri, David Kisailus,
... shield‐like segment of abdominal armor called the telson. Multiscale structure–mechanical property relationships of this damage‐ ... resisting failure from repeated high‐energy impacts. The telson structures of the smashing‐type species, Odontodactylus scyllarus , ... pressures driving the formation and use of the telson as a biological shield. A higher bulk compressive stiffness is identified within the smasher telson, which is attributed to its concave macromorphology, thicker ... toughening mechanism of crack twisting within the smasher telson, attributed to its well‐defined pitch‐graded helicoidal ...
Tópico(s): Cephalopods and Marine Biology
2019 - Wiley | Advanced Functional Materials
... why some are nonspiking, we examined the spiking telson‐uropod stretch receptors in the spiny sand crab ... quadrispina (Galatheidae) and compared them with the nonspiking telson‐uropod stretch receptor of the mole sand crab ... s nonspiking receptor. We conclude that the spiking telson‐uropod stretch receptors of albuneids and galatheids are ... B. occidentalis < E. analoga . The spiking and nonspiking telson‐uropod stretch receptors differ anatomically in three major ... different. We conclude that the hippid's nonspiking telson‐uropod stretch receptor evolved de novo and not ...
Tópico(s): Coral and Marine Ecosystems Studies
1994 - Wiley | The Journal of Comparative Neurology
Masahiro Takahata, Jeffrey J. Wine,
... to investigate the afferent input onto the two telson flexor inhibitors (F16 and F17), which receive more ... pathways. 3. When any afferent nerve from the telson was stimulated, both telson FIs showed an additional fast-rising, short-latency ( ... afferent nerves innervating any region other than the telson. The fast PSPs of the two FIs were ... was observed when any two of the four telson nerves that evoked the response were stimulated simultaneously. ... least two separate suprathreshold pathways converge onto the telson FIs.
Tópico(s): Neuroscience and Neural Engineering
1987 - American Physiological Society | Journal of Neurophysiology
... grouped into seven stages based on pleopod and telson development. The larval stage ends at the juvenile ... terminal spine and two posterolateral spines on the telson. The frequency of occurrence of larval furcilia forms ... 7, there was a common dominant pathway of telson development for both field and reared animals. The ... estadios en base al desarrollo de pleopodos y telson. El desarrollo larval finalizo en la fase juvenil ... espina terminal y dos espinas posterolaterales en el telson. La frecuencia de aparicion de formas de furcilia ...
Tópico(s): Marine and coastal plant biology
2008 - Brill | Crustaceana
... docked stump only of a lJl'imarily elongate telson, reduced mouth parts, and uropods but slightly armed.This stump of the telson bears a te1•minal fringe of spines, in ... an intermediate condition in the reduction of the telson, or be due to a secondary acquisition of ... projection reduced to sn1all upturned stump ; pleura of telson well developed; ~;rnathopod with spines on palm denticulate; ... three pairs of spines A'2.Eyes wanting; telson scarcely produced or upturned.its hinder dorsal border ... with stout sub-conical spines.B. Body vermiform, telson with flattened posterior surface; spine beneath insertion of ...
Tópico(s): Historical, Religious, and Philosophical Studies
1943 - | Papers and proceedings of the Royal Society of Tasmania
Maynard M. Dewey, Rhea J. C. Levine, D. Colflesh,
The musculature of the telson of Limulus polyphemus L. consists of three dorsal muscles: the medial and lateral telson levators and the telson abductor, and one large ventral muscle; the telson depressor, which has three major divisions: the dorsal, medioventral, and lateroventral heads. The telson muscles are composed of one type of striated ...
Tópico(s): Muscle Physiology and Disorders
1973 - Rockefeller University Press | The Journal of Cell Biology
Takashi Sato, Robin E. Denell,
... the derivatives of AB9 and AB10 as the “telson.” The caudal tip is rich in cuticular features, ... patterns in the thorax to those in the telson, we have been able to assign the segmental origin of cuticular features of the telson. This study suggests that AB8 elaborates three pairs ... region extending from the posterior mesothorax through the telson. Studies by others have shown that the centromere- ... normal development of the posterior AB8 and the telson.
Tópico(s): Chromosomal and Genetic Variations
1986 - Elsevier BV | Developmental Biology
Simone Helluy, Barbara S. Beltz,
... of resolution: whole eggs, dissected embryos, antennulae and telsons. The tegumentary and setal changes in the telson show that a complete molt cycle takes place ... begins to separate from the setae in the telson; this signals the start of Drach's (1939) ... are forming proximally and medially in the bilobed telson under the metanaupliar cuticle. At E90%, these setae ... has entered stage D1. After hatching (E100%), the telson of the free metanauplius (prelarva) shows the characteristics ...
Tópico(s): Aquaculture Nutrition and Growth
1991 - Marine Biological Laboratory (MBL) | Biological Bulletin
Franziska Knopf, Stefan Koenemann, Frederick R. Schram, Carsten Wolff,
... anatomy is not sustainable, viz., that the free telson, when present, bears the anus near the base. ... sub-terminal, or mid-ventral position on the telson; or can be located on the sixth pleomere – even when a free telson is present. Furthermore, there is information that might ... interpreted to suggest that in some cases a telson can be absent. Embryologic data indicates that the ... understanding of the genesis of the so-called telson of amphipods could be subject to alternative interpretations ...
Tópico(s): Aquatic Invertebrate Ecology and Behavior
2006 - Naturalis Biodiversity Center | Contributions to Zoology
Xinzheng Li, Alexander J. Bruce,
... more than two (usually four) pairs of dorsolateral telson spines anterior to the posterior telson margin, the cornea is usually reduced, the dactyl ... shape and the number of pairs of dorsolateral telson spines. Mesopontonia brevicarpalis sp. nov., from the southeast ... complexe Periclimenes alcocki" donc les espèces ont un telson portant, en avant de son bord postérieur, plus ... le nombre des paires d'épines dorsolatérales du telson. Mesopontonia brevicarpalis sp. nov. de la côte sud‐ ...
Tópico(s): Coral and Marine Ecosystems Studies
2006 - Taylor & Francis | Journal of Natural History
Markus Poschmann, Jason A. Dunlop,
... remarkable and unique aspect is the long, flagelliform telson. Although our fossil apparently lacks chelifores (an apomorphy), the retained telson and the segmented trunk end behind the last ... between Palaeoisopus problematicus Broili, which has a lanceolate telson and the most trunk segments of any sea ... that at least two fossil pycnogonids retained a telson, albeit with very different morphologies, and further supports ...
Tópico(s): Ichthyology and Marine Biology
2006 - Wiley | Palaeontology
Michel E. Hendrickx, Hugo Aguirre‐Villaseñor,
... the brown shrimp, Farfantepenaeus californiensis and a bifid telson in the white shrimp, Litopenaeus vannamei . Des anomalies ... bifide et la crevette blanche, Litopenaeus vannamei , un telson bifide. , Morphological abnormalities were observed in two specimens ... the brown shrimp, Farfantepenaeus californiensis and a bifid telson in the white shrimp, Litopenaeus vannamei . Des anomalies ... bifide et la crevette blanche, Litopenaeus vannamei , un telson bifide. ]
Tópico(s): Parasite Biology and Host Interactions
2005 - Brill | Crustaceana
Hee-seung Hwang, Shane T. Ahyong, Won Kim,
... 8–14 spines on lateral margin of the telson, numerous minute dorsal spines on the telson and abdominal somite 6, and large, pyriform submedian bosses on the telson preceded by a small rounded boss. Chorisquilla orientalis ... dorsal ornamentation of abdominal somite 6 and the telson and reaches a considerably larger size. Chorisquilla orientalis ... and in the number of lateral spines on telson. Also, C. mehtae Erdmann & Manning, 1998, which, to ...
Tópico(s): Marine and fisheries research
2018 - Q15088586 | Zootaxa
W. Wayne Price, Richard W. Heard,
... setae completely lining the lateral margins of the telson, and each apical lobe of the telson with a pair of spiniform setae, the outer ... carpo-propodus of thoracic endopod 3, and (3) telson cleft depth: telson length ratio of about 1/6, and outer: inner length ratio of apical telson setae of 1.2–1.6. Diagnostic tables ...
Tópico(s): Coral and Marine Ecosystems Studies
2011 - Q15088586 | Zootaxa
E. W. Knight‐Jones, Phyllis Knight‐Jones,
... spirorbid tubes. It has one pair of hind telson plumose setae, each with a small companion seta ... margin (by a distance ca 0.2 of telson width) two small setae may arise dorsally from the telson in adcentral positions (about the same distance apart ... former and close to the sides of the telson in latter, with only two marginal teeth between ... bifidus sp. nov. from Cape Town has hind telson plumose setae separated by a single bifid tooth. ...
Tópico(s): Crustacean biology and ecology
2002 - Taylor & Francis | Journal of Natural History
... stages are given below:First stage-Abdomen unsegmented. Telson with six terminal spines. Uropods not yet developed. ... seventh segment not yet separated from the sixth. Telson with seven terminal spines. The developing uropods can ... integument.Third stage-Abdomen with seven distinct segments. Telson with seven terminal spines. Uropods present.4. Fourteen ... in number of the terminal spines on the telson also provides further evidence to illustrate that the ... second pair of postero-lateral spines on the telson has disappeared in the second stage. In the ...
Tópico(s): Marine Biology and Ecology Research
1965 - | Haiyang yu huzhao
... gross anatomy of the tailfan, particularly of the telson, is very different in the two species, the ... Emerita constitutes 50% by wet weight of the telson musculature. Homologies between motoneurones innervating telson muscles in the two crabs are established based ... central morphology. The derivation of the sand crab telson muscles and their innervation from neuromusculature in an ...
Tópico(s): Fish biology, ecology, and behavior
1981 - The Company of Biologists | Journal of Experimental Biology
Anthony S. Clare, George Lumb, PATRICIA A. CLARE, John D. Costlow,
Summary The morphology of telson regeneration in postlarval Limulus polyphemus has been studied by light and transmission electron microscopy. Three types of 'haemocyte' (granular haemocyte, ... cells for the differentiation of tissues of the telson, in particular, nerve and muscle. This study provides a framework against which effects of xenobiotics on telson regeneration can be assessed.
Tópico(s): Reproductive biology and impacts on aquatic species
1990 - Taylor & Francis | Invertebrate Reproduction & Development
Roy E. Plotnick, Tomasz K. Baumiller,
... physical laws (paleobiomechanics). Alternative functional models for the telson (tail spine) of the large pterygotid eurypterids are ... of fish propulsion and of ship rudders. The telson probably served as a rudder for steering in ... a thrust producer. The aspect ratio of the telson may approach an ‘optimum’, for the production of ...
Tópico(s): Fish biology, ecology, and behavior
1988 - Wiley | Lethaia
... the abdomen, the head-thorax region and the telson, respectively, appear normal. However, in embryos mutant for ... normally formed at the anterior (acron) and posterior (telson) are missing in mutant larvae and the fate ... structures of the acron (labrum, dorsal bridge) and telson (anal pads, tuft, Filzkörper, spiracle) are missing (Fig. ... posteriorly, the hindgut, the malpighian tubules and the telson are missing (Fig. 1E). Fate mapping experiments indicate ... acron is replaced by a duplication of the telson, normally located posteriorly (Fig. 1F). The defects of ...
Tópico(s): Marine Ecology and Invasive Species
1988 - The Company of Biologists | Development