Portia Perceptions: the Umwelt of an Araneophagic Jumping Spider
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Five Topographically Organized Fields in the Somatosensory Cortex of the Flying Fox: Microelectrode Maps, Myeloarchitecture, and Cortical Modules
THE JOURNAL OF COMPARATIVE NEUROLOGY 317:1-30 (1992) Five Topographically Organized Fields in the Somatosensory Cortex of the Flying Fox: Microelectrode Maps, Myeloarchitecture, and Cortical Modules LEAH A. KRUBITZER AND MIKE B. CALFORD Vision, Touch and Hearing Research Centre, Department of Physiology and Pharmacology, The University of Queensland, Queensland, Australia 4072 ABSTRACT Five somatosensory fields were defined in the grey-headed flying fox by using microelec- trode mapping procedures. These fields are: the primary somatosensory area, SI or area 3b; a field caudal to area 3b, area 1/2; the second somatosensory area, SII; the parietal ventral area, PV; and the ventral somatosensory area, VS. A large number of closely spaced electrode penetrations recording multiunit activity revealed that each of these fields had a complete somatotopic representation. Microelectrode maps of somatosensory fields were related to architecture in cortex that had been flattened, cut parallel to the cortical surface, and stained for myelin. Receptive field size and some neural properties of individual fields were directly compared. Area 3b was the largest field identified and its topography was similar to that described in many other mammals. Neurons in 3b were highly responsive to cutaneous stimulation of peripheral body parts and had relatively small receptive fields. The myeloarchi- tecture revealed patches of dense myelination surrounded by thin zones of lightly myelinated cortex. Microelectrode recordings showed that myelin-dense and sparse zones in 3b were related to neurons that responded consistently or habituated to repetitive stimulation respectively. In cortex caudal to 3b, and protruding into 3b, a complete representation of the body surface adjacent to much of the caudal boundary of 3b was defined. -
Ecology and Behavior of the Giant Wood Spider in New Guinea
Ecology and Behavior of the Giant Wood Spider Nephila maculata (Fabricius) in New Guinea MICHAEL H. ROBINSON and BARBARA ROBINSON SMITHSONIAN CONTRIBUTIONS TO ZOOLOGY • NUMBER 149 SERIAL PUBLICATIONS OF THE SMITHSONIAN INSTITUTION The emphasis upon publications as a means of diffusing knowledge was expressed by the first Secretary of the Smithsonian Institution. In his formal plan for the Insti- tution, Joseph Henry articulated a program that included the following statement: "It is proposed to publish a series of reports, giving an account of the new discoveries in science, and of the changes made from year to year in all branches of knowledge." This keynote of basic research has been adhered to over the years in the issuance of thousands of titles in serial publications under the Smithsonian imprint, com- mencing with Smithsonian Contributions to Knowledge in 1848 and continuing with the following active series: Smithsonian Annals of Flight Smithsonian Contributions to Anthropology Smithsonian Contributions to Astrophysics Smithsonian Contributions to Botany Smithsonian Contributions to the Earth Sciences Smithsonian Contributions to Paleobiology Smithsonian Contributions to Zoology Smithsonian Studies in History and Technology In these series, the Institution publishes original articles and monographs dealing with the research and collections of its several museums and offices and of professional colleagues at other institutions of learning. These papers report newly acquired facts, synoptic interpretations of data, or original theory in specialized fields. These pub- lications are distributed by mailing lists to libraries, laboratories, and other interested institutions and specialists throughout the world. Individual copies may be obtained from the Smithsonian Institution Press as long as stocks are available. -
Spatial Restriction of Light Adaptation Inactivation in Fly Photoreceptors and Mutation-Induced
The Journal of Neuroscience, April 1991, 7 f(4): 900-909 Spatial Restriction of Light Adaptation and Mutation-Induced Inactivation in Fly Photoreceptors Baruch Minke and Richard Payne” Department of Neuroscience, The Howard Hughes Medical Institute, The Johns Hopkins University School of Medicine, Baltimore, Maryland 21205 The spatial spread within fly photoreceptors of 2 forms of We describe simple preparations of the retinas of the housefly, desensitization by bright light have been investigated: the Musca domestica, and the sheepblowfly, Lucilia cuprina, that natural process of light adaptation in normal Musca photo- allow recording from individual ommatidia in vitro, using a receptors and a receptor-potential inactivation in the no- suction pipette similar to that used to record from rod photo- steady-state (nss) mutant of the sheep blowfly Lucilia. The receptors of the vertebrate retina (Baylor et al., 1979; for a suction-electrode method used for recording from verte- preliminary use of this method, see also Becker et al., 1987). brate rods was applied to fly ommatidia. A single ommatid- The suction-electrode method has 2 advantages when applied ium in vitro was partially sucked into a recording pipette. to fly photoreceptors. First, the method might prove to be more Illumination of the portion of the ommatidium within the pi- convenient than the use of intracellular microelectrodes when pette resulted in a flow of current having a wave form similar recording from small photoreceptors, such as those of Drosoph- to that of the receptor potential and polarity consistent with ila. Recordings from Drosophila are needed to perform func- current flow into the illuminated region of the photorecep- tional tests on mutant flies. -
Diversity of Simonid Spiders (Araneae: Salticidae: Salticinae) in India
IJBI 2 (2), (DECEMBER 2020) 247-276 International Journal of Biological Innovations Available online: http://ijbi.org.in | http://www.gesa.org.in/journals.php DOI: https://doi.org/10.46505/IJBI.2020.2223 Review Article E-ISSN: 2582-1032 DIVERSITY OF SIMONID SPIDERS (ARANEAE: SALTICIDAE: SALTICINAE) IN INDIA Rajendra Singh1*, Garima Singh2, Bindra Bihari Singh3 1Department of Zoology, Deendayal Upadhyay University of Gorakhpur (U.P.), India 2Department of Zoology, University of Rajasthan, Jaipur (Rajasthan), India 3Department of Agricultural Entomology, Janta Mahavidyalaya, Ajitmal, Auraiya (U.P.), India *Corresponding author: [email protected] Received: 01.09.2020 Accepted: 30.09.2020 Published: 09.10.2020 Abstract: Distribution of spiders belonging to 4 tribes of clade Simonida (Salticinae: Salticidae: Araneae) reported in India is dealt. The tribe Aelurillini (7 genera, 27 species) is represented in 16 states and in 2 union territories, Euophryini (10 genera, 16 species) in 14 states and in 4 union territories, Leptorchestini (2 genera, 3 species) only in 2 union territories, Plexippini (22 genera, 73 species) in all states except Mizoram and in 3 union territories, and Salticini (3 genera, 11 species) in 15 states and in 4 union terrioties. West Bengal harbours maximum number of species, followed by Tamil Nadu and Maharashtra. Out of 129 species of the spiders listed, 70 species (54.3%) are endemic to India. Keywords: Aelurillini, Euophryini, India, Leptorchestini, Plexippini, Salticidae, Simonida. INTRODUCTION Hisponinae, Lyssomaninae, Onomastinae, Spiders are chelicerate arthropods belonging to Salticinae and Spartaeinae. Out of all the order Araneae of class Arachnida. Till to date subfamilies, Salticinae comprises 93.7% of the 48,804 described species under 4,180 genera and species (5818 species, 576 genera, including few 128 families (WSC, 2020). -
Sexual Selection Research on Spiders: Progress and Biases
Biol. Rev. (2005), 80, pp. 363–385. f Cambridge Philosophical Society 363 doi:10.1017/S1464793104006700 Printed in the United Kingdom Sexual selection research on spiders: progress and biases Bernhard A. Huber* Zoological Research Institute and Museum Alexander Koenig, Adenauerallee 160, 53113 Bonn, Germany (Received 7 June 2004; revised 25 November 2004; accepted 29 November 2004) ABSTRACT The renaissance of interest in sexual selection during the last decades has fuelled an extraordinary increase of scientific papers on the subject in spiders. Research has focused both on the process of sexual selection itself, for example on the signals and various modalities involved, and on the patterns, that is the outcome of mate choice and competition depending on certain parameters. Sexual selection has most clearly been demonstrated in cases involving visual and acoustical signals but most spiders are myopic and mute, relying rather on vibrations, chemical and tactile stimuli. This review argues that research has been biased towards modalities that are relatively easily accessible to the human observer. Circumstantial and comparative evidence indicates that sexual selection working via substrate-borne vibrations and tactile as well as chemical stimuli may be common and widespread in spiders. Pattern-oriented research has focused on several phenomena for which spiders offer excellent model objects, like sexual size dimorphism, nuptial feeding, sexual cannibalism, and sperm competition. The accumulating evidence argues for a highly complex set of explanations for seemingly uniform patterns like size dimorphism and sexual cannibalism. Sexual selection appears involved as well as natural selection and mechanisms that are adaptive in other contexts only. Sperm competition has resulted in a plethora of morpho- logical and behavioural adaptations, and simplistic models like those linking reproductive morphology with behaviour and sperm priority patterns in a straightforward way are being replaced by complex models involving an array of parameters. -
Speculative Hunting by an Araneophagic Salticid Spider
SPECULATIVE HUNTINGBY ANARANEOPHAGICSAL TICID SPIDER by ROBERT J.CLARK , DUANE P.HARLAND and ROBERT R.JACKSON 1,2) (Departmentof Zoology,University of Canterbury, Private Bag 4800, Christchurch, New Zealand) (Acc.3-VII-2000) Summary Portia mbriata ,anaraneophagic jumping spider ( Salticidae),makes undirected leaps ( er- raticleaping with no particulartarget being evident) in the presence of chemicalcues from Jacksonoidesqueenslandicus ,anothersalticid and a commonprey of P. mbriata. Whether undirectedleaping by P. mbriata functionsas hunting by speculation is investigatedexperi- mentally.Our rsthypothesis, that undirected leaps provoke movement by J.queenslandicus , wasinvestigated using living P. mbriata andthree types of luresmade from dead, dry arthro- pods (P. mbriata, J.queenslandicus and Muscadomestica ).When a living P. mbriata made undirectedleaps or aspring-drivendevice made the lures suddenly move up and down, sim- ulatingundirected leaping, J.queenslandicus respondedby wavingits palps and starting to walk.There was no statisticalevidence that the species from which the lure was made in u- enced J.queenslandicus ’responsein these tests. Our second hypothesis, that J.queenslandi- cus revealsits location to P. mbriata bymoving, was investigated by recording P. mbriata’s reaction to J.queenslandicus when J.queenslandicus reactedto luressimulating undirected leaping.In these tests, P. mbriata respondedby turning toward J.queenslandicus and waving its palps. Keywords: Portia mbriata , Jacksonoidesqueenslandicus ,jumpingspiders, predation, spec- ulativehunting. 1) Correspondingauthor; e-mail address: [email protected] 2) WethankPhil T aylorand David Blest for useful discussion and valuable comments on the manuscript.Financial support was provided by theNational Science Foundation ( GrantBNS 861078)and the Marsden Fund of New Zealand(Grant UOC512). c KoninklijkeBrill NV ,Leiden,2000 Behaviour137, 1601-1612 ® 1602 CLARK, HARLAND&JACKSON Introduction Ageneralproblem facing predators is howto locate prey(Curio, 1976). -
Evolutionary and Homeostatic Changes in Morphology of Visual Dendrites of Mauthner Cells in Astyanax Blind Cavefish
bioRxiv preprint doi: https://doi.org/10.1101/2020.05.13.094680; this version posted May 15, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 1 Research Article 2 Evolutionary and homeostatic changes in morphology of visual dendrites of 3 Mauthner cells in Astyanax blind cavefish 4 5 Zainab Tanvir1, Daihana Rivera1, Kristen E. Severi1, Gal Haspel1, Daphne Soares1* 6 7 1 Federated Department of Biological Sciences, New Jersey Institute of Technology, Newark NJ 8 07102 9 10 11 12 Short Title: Astyanax Mauthner cell ventral dendrites 13 14 15 *Corresponding Author 16 Daphne Soares 17 Biological Sciences 18 New Jersey Institute of Technology 19 100 Summit street 20 Newark, NJ, 07102, USA 21 Tel: 973 596 6421 22 Fax: 23 E-mail: [email protected] 24 Keywords: Evolution, neuron, fish, homeostasis, adaptation 25 26 Abstract bioRxiv preprint doi: https://doi.org/10.1101/2020.05.13.094680; this version posted May 15, 2020. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under aCC-BY-NC-ND 4.0 International license. 27 Mauthner cells are the largest neurons in the hindbrain of teleost fish and most amphibians. Each 28 cell has two major dendrites thought to receive segregated streams of sensory input: the lateral 29 dendrite receives mechanosensory input while the ventral dendrite receives visual input. -
Visual Perception in Jumping Spiders (Araneae,Salticidae)
Visual Perception in Jumping Spiders (Araneae,Salticidae) A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy in Biology at the University of Canterbury by Yinnon Dolev University of Canterbury 2016 Table of Contents Abstract.............................................................................................................................................................................. i Acknowledgments .......................................................................................................................................................... iii Preface ............................................................................................................................................................................. vi Chapter 1: Introduction ................................................................................................................................................... 1 Chapter 2: Innate pattern recognition and categorisation in a jumping Spider ........................................................... 9 Abstract ....................................................................................................................................................................... 10 Introduction ................................................................................................................................................................ 11 Methods ..................................................................................................................................................................... -
Seeing Through Moving Eyes
bioRxiv preprint doi: https://doi.org/10.1101/083691; this version posted June 1, 2017. The copyright holder for this preprint (which was not certified by peer review) is the author/funder. All rights reserved. No reuse allowed without permission. 1 Seeing through moving eyes - microsaccadic information sampling provides 2 Drosophila hyperacute vision 3 4 Mikko Juusola1,2*‡, An Dau2‡, Zhuoyi Song2‡, Narendra Solanki2, Diana Rien1,2, David Jaciuch2, 5 Sidhartha Dongre2, Florence Blanchard2, Gonzalo G. de Polavieja3, Roger C. Hardie4 and Jouni 6 Takalo2 7 8 1National Key laboratory of Cognitive Neuroscience and Learning, Beijing, Beijing Normal 9 University, Beijing 100875, China 10 2Department of Biomedical Science, University of Sheffield, Sheffield S10 T2N, UK 11 3Champalimaud Neuroscience Programme, Champalimaud Center for the Unknown, Lisbon, 12 Portugal 13 4Department of Physiology Development and Neuroscience, Cambridge University, Cambridge CB2 14 3EG, UK 15 16 *Correspondence to: [email protected] 17 ‡ Equal contribution 18 19 Small fly eyes should not see fine image details. Because flies exhibit saccadic visual behaviors 20 and their compound eyes have relatively few ommatidia (sampling points), their photoreceptors 21 would be expected to generate blurry and coarse retinal images of the world. Here we 22 demonstrate that Drosophila see the world far better than predicted from the classic theories. 23 By using electrophysiological, optical and behavioral assays, we found that R1-R6 24 photoreceptors’ encoding capacity in time is maximized to fast high-contrast bursts, which 25 resemble their light input during saccadic behaviors. Whilst over space, R1-R6s resolve moving 26 objects at saccadic speeds beyond the predicted motion-blur-limit. -
The Genus Metallyticus Reviewed (Insecta: Mantodea)
See discussions, stats, and author profiles for this publication at: https://www.researchgate.net/publication/228623877 The genus Metallyticus reviewed (Insecta: Mantodea) Article · September 2008 CITATIONS READS 11 353 1 author: Frank Wieland Pfalzmuseum für Naturkunde - POLLICHIA-… 33 PUBLICATIONS 113 CITATIONS SEE PROFILE All in-text references underlined in blue are linked to publications on ResearchGate, Available from: Frank Wieland letting you access and read them immediately. Retrieved on: 24 October 2016 Species, Phylogeny and Evolution 1, 3 (30.9.2008): 147-170. The genus Metallyticus reviewed (Insecta: Mantodea) Frank Wieland Johann-Friedrich-Blumenbach-Institut für Zoologie & Anthropologie und Zoologisches Museum der Georg-August-Universität, Abteilung für Morphologie, Systematik und Evolutionsbiologie, Berliner Str. 28, 37073 Göttingen, Germany [[email protected]] Abstract Metallyticus Westwood, 1835 (Insecta: Dictyoptera: Mantodea) is one of the most fascinating praying mantids but little is known of its biology. Several morphological traits are plesiomorphic, such as the short prothorax, characters of the wing venation and possibly also the lack of discoidal spines on the fore femora. On the other hand, Metallyticus has autapomor- phies which are unique among extant Mantodea, such as the iridescent bluish-green body coloration and the enlargement of the first posteroventral spine of the fore femora. The present publication reviews our knowledge of Metallyticus thus providing a basis for further research. Data on 115 Metallyticus specimens are gathered and interpreted. The Latin original descriptions of the five Metallyticus species known to date, as well as additional descriptions and a key to species level that were originally published by Giglio-Tos (1927) in French, are translated into English. -
Two New Genera of Jumping Spiders from Hainan Island, China (Araneae, Salticidae)
Zootaxa 3712 (1): 001–084 ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Monograph ZOOTAXA Copyright © 2013 Magnolia Press ISSN 1175-5334 (online edition) http://dx.doi.org/10.11646/zootaxa.3712.1.1 http://zoobank.org/urn:lsid:zoobank.org:pub:91ACA25B-A016-40ED-B105-3D9D960CA92E ZOOTAXA 3712 Two New Genera of Jumping Spiders from Hainan Island, China (Araneae, Salticidae) YUANYE ZHOU 1, 2 & SHUQIANG LI 1, 3 1Institute of Zoology, Chinese Academy of Sciences, Beijing 100101, China 2Liaoning Key Laboratory of Evolution and Biodiversity, Shenyang Normal University, Shenyang 110034, China 3 Corresponding author. E-mail: [email protected] Magnolia Press Auckland, New Zealand Accepted by T. Szuts: 8 Aug. 2013; published: 19 Sept. 2013 YUANYE ZHOU & SHUQIANG LI Two New Genera of Jumping Spiders from Hainan Island, China (Araneae, Salticidae) (Zootaxa 3712) 84 pp.; 30 cm. 19 Sept. 2013 ISBN 978-1-77557-262-6 (paperback) ISBN 978-1-77557-263-3 (Online edition) FIRST PUBLISHED IN 2013 BY Magnolia Press P.O. Box 41-383 Auckland 1346 New Zealand e-mail: [email protected] http://www.mapress.com/zootaxa/ © 2013 Magnolia Press All rights reserved. No part of this publication may be reproduced, stored, transmitted or disseminated, in any form, or by any means, without prior written permission from the publisher, to whom all requests to reproduce copyright material should be directed in writing. This authorization does not extend to any other kind of copying, by any means, in any form, and for any purpose other than private research use. ISSN 1175-5326 (Print edition) ISSN 1175-5334 (Online edition) 2 · Zootaxa 3712 (1) © 2013 Magnolia Press ZHOU & LI Table of contents Abstract . -
Neural Mapping of Direction and Frequency in the Cricket Cercal Sensory System
The Journal of Neuroscience, March 1, 1999, 19(5):1771–1781 Neural Mapping of Direction and Frequency in the Cricket Cercal Sensory System Sussan Paydar,2 Caitlin A. Doan,2 and Gwen A. Jacobs1 1Center for Computational Biology, Montana State University, Bozeman, Montana 59717, and 2Department of Molecular and Cell Biology, University of California, Berkeley, California 94720 Primary mechanosensory receptors and interneurons in the segregation was investigated, by calculating the relative over- cricket cercal sensory system are sensitive to the direction and lap between the long and medium-length hair afferents with the frequency of air current stimuli. Receptors innervating long dendrites of two interneurons that are known to have different mechanoreceptor hairs (.1000 mm) are most sensitive to low- frequency sensitivities. Both interneurons were shown to have frequency air currents (,150 Hz); receptors innervating nearly equal anatomical overlap with long and medium hair medium-length hairs (900–500 mm) are most sensitive to higher afferents. Thus, the differential overlap of these interneurons frequency ranges (150–400 Hz). Previous studies demonstrated with the two different classes of afferents was not adequate to that the projection pattern of the synaptic arborizations of long explain the observed frequency selectivity of the interneurons. hair receptor afferents form a continuous map of air current Other mechanisms such as selective connectivity between direction within the terminal abdominal ganglion (Jacobs and subsets of afferents and interneurons and/or differences in Theunissen, 1996). We demonstrate here that the projection interneuron biophysical properties must play a role in establish- pattern of the medium-length hair afferents also forms a con- ing the frequency selectivities of these interneurons.