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Sphingomyelinase D Activity in Sicarius Tropicus Venom:Toxic
toxins Article Sphingomyelinase D Activity in Sicarius tropicus Venom: Toxic Potential and Clues to the Evolution of SMases D in the Sicariidae Family Priscila Hess Lopes 1, Caroline Sayuri Fukushima 2,3 , Rosana Shoji 1, Rogério Bertani 2 and Denise V. Tambourgi 1,* 1 Immunochemistry Laboratory, Butantan Institute, São Paulo 05503-900, Brazil; [email protected] (P.H.L.); [email protected] (R.S.) 2 Special Laboratory of Ecology and Evolution, Butantan Institute, São Paulo 05503-900, Brazil; [email protected] (C.S.F.); [email protected] (R.B.) 3 Finnish Museum of Natural History, University of Helsinki, 00014 Helsinki, Finland * Correspondence: [email protected] Abstract: The spider family Sicariidae includes three genera, Hexophthalma, Sicarius and Loxosceles. The three genera share a common characteristic in their venoms: the presence of Sphingomyelinases D (SMase D). SMases D are considered the toxins that cause the main pathological effects of the Loxosceles venom, that is, those responsible for the development of loxoscelism. Some studies have shown that Sicarius spiders have less or undetectable SMase D activity in their venoms, when compared to Hexophthalma. In contrast, our group has shown that Sicarius ornatus, a Brazilian species, has active SMase D and toxic potential to envenomation. However, few species of Sicarius have been characterized for their toxic potential. In order to contribute to a better understanding about the toxicity of Sicarius venoms, the aim of this study was to characterize the toxic properties of male and female venoms from Sicarius tropicus and compare them with that from Loxosceles laeta, one Citation: Lopes, P.H.; Fukushima, of the most toxic Loxosceles venoms. -
Selection for Imperfection: a Review of Asymmetric Genitalia 2 in Araneomorph Spiders (Araneae: Araneomorphae)
bioRxiv preprint doi: https://doi.org/10.1101/704692; this version posted July 16, 2019. The copyright holder for this preprint (which was not certified by peer review) is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity.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 4.0 International license. 1 Selection for imperfection: A review of asymmetric genitalia 2 in araneomorph spiders (Araneae: Araneomorphae). 3 4 5 6 F. ANDRES RIVERA-QUIROZ*1, 3, MENNO SCHILTHUIZEN2, 3, BOOPA 7 PETCHARAD4 and JEREMY A. MILLER1 8 1 Department Biodiversity Discovery group, Naturalis Biodiversity Center, 9 Darwinweg 2, 2333CR Leiden, The Netherlands 10 2 Endless Forms Group, Naturalis Biodiversity Center, Darwinweg 2, 2333CR Leiden, 11 The Netherlands 12 3 Institute for Biology Leiden (IBL), Leiden University, Sylviusweg 72, 2333BE 13 Leiden, The Netherlands. 14 4 Faculty of Science and Technology, Thammasat University, Rangsit, Pathum Thani, 15 12121 Thailand. 16 17 18 19 Running Title: Asymmetric genitalia in spiders 20 21 *Corresponding author 22 E-mail: [email protected] (AR) 23 bioRxiv preprint doi: https://doi.org/10.1101/704692; this version posted July 16, 2019. 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 4.0 International license. 24 Abstract 25 26 Bilateral asymmetry in the genitalia is a rare but widely dispersed phenomenon in the 27 animal tree of life. In arthropods, occurrences vary greatly from one group to another 28 and there seems to be no common explanation for all the independent origins. -
Loxosceles Laeta (Nicolet) (Arachnida: Araneae) in Southern Patagonia
Revista de la Sociedad Entomológica Argentina ISSN: 0373-5680 ISSN: 1851-7471 [email protected] Sociedad Entomológica Argentina Argentina The recent expansion of Chilean recluse Loxosceles laeta (Nicolet) (Arachnida: Araneae) in Southern Patagonia Faúndez, Eduardo I.; Alvarez-Muñoz, Claudia X.; Carvajal, Mariom A.; Vargas, Catalina J. The recent expansion of Chilean recluse Loxosceles laeta (Nicolet) (Arachnida: Araneae) in Southern Patagonia Revista de la Sociedad Entomológica Argentina, vol. 79, no. 2, 2020 Sociedad Entomológica Argentina, Argentina Available in: https://www.redalyc.org/articulo.oa?id=322062959008 PDF generated from XML JATS4R by Redalyc Project academic non-profit, developed under the open access initiative Notas e recent expansion of Chilean recluse Loxosceles laeta (Nicolet) (Arachnida: Araneae) in Southern Patagonia La reciente expansión de Loxosceles laeta (Nicolet) (Arachnida: Araneae) en la Patagonia Austral Eduardo I. Faúndez Laboratorio de entomología, Instituto de la Patagonia, Universidad de Magallanes, Chile Claudia X. Alvarez-Muñoz Unidad de zoonosis, Secretaria Regional Ministerial de Salud de Aysén, Chile Mariom A. Carvajal [email protected] Laboratorio de entomología, Instituto de la Patagonia, Universidad de Magallanes, Chile Catalina J. Vargas Revista de la Sociedad Entomológica Argentina, vol. 79, no. 2, 2020 Laboratorio de entomología, Instituto de la Patagonia, Universidad de Sociedad Entomológica Argentina, Magallanes, Chile Argentina Received: 06 February 2020 Accepted: 03 May 2020 Published: 29 June 2020 Abstract: e recent expansion of the Chilean recluse Loxosceles laeta (Nicolet, 1849) Redalyc: https://www.redalyc.org/ in southern Patagonia is commented and discussed in the light of current global change. articulo.oa?id=322062959008 New records are provided from both Región de Aysén and Región de Magallanes. -
SANSA News, Issue 28, Jan-April 2017
1 SANSA NEWS South African National Survey of Arachnida Newsletter Date No 28 JAN APRIL 2017 FEEDBACK ON THE Inside this issue: 12 AFRAS COLLOQUIUM Feedback AFRAS colloquium …..1-2 22-25 January 2017 SANSA 20 years ………...................3 Medically important spiders..……….4 Spiders in and around the house…..5 University of the Free State…………6 University of Venda………………….7 ARC-PPR………...………………......8 National Mus of the Free State …….9 New genera…………………..……..10 Field observations Q and A…........ 11 Student project……………………...12 Soil paper…………………………...13 Recent publications……………......14 Last Word……………………….......15 NATIONAL SPIDER SPECIES COUNT JANUARY 2015 — 2171 species JUNE 2015 — 2192 species OCTOBER 2015 — 2220 species MAY 2016 — 2234 species DECEMBER 2016 — 2239 species APRIL 2017 — 2243 species Delegates at the colloquium The 12th AFRAS colloquium was hosted by the University of the Free State and the ARC. It was held at the Goudini Spa in the Worcester district, Western Cape, South Africa. The objectives of these Colloquia are to promote research on the African Arachnida (non-Acari) and to provide a fo- rum for the discussion of research on African arachnids in oral presentations, posters and work- Editors and coordinators: shops, as well as informal discussions. Ansie Dippenaar-Schoeman & A total of 40 delegates and five accompanying persons attended the colloquium, from as far afield Robin Lyle as Belgium, Israel, Russia, Czech Republic, Nigeria, Sudan, Zimbabwe, UK and USA. ARC-Plant Protection Research Private Bag X134 37 papers and 17 posters were presented during the colloquium Queenswood 0121 Two workshops were held, organized by Dr Ansie Dippenaar-Schoeman on the South African South Africa National Survey of Arachnida (SANSA), and by Dr Gerbus Muller on medically important spiders E-mail: [email protected] We also celebrated the 20th year of SANSA and 30th year of AFRAS. -
A List of Spider Species Found in the Addo Elephant National Park, Eastern Cape Province, South Africa
KOEDOE - African Protected Area Conservation and Science ISSN: (Online) 2071-0771, (Print) 0075-6458 Page 1 of 13 Checklist A list of spider species found in the Addo Elephant National Park, Eastern Cape province, South Africa Authors: The knowledge of spiders in the Eastern Cape province lags behind that of most other South Anna S. Dippenaar- African provinces. The Eastern Cape province is renowned for its conservation areas, as the Schoeman1,2 Linda Wiese3 largest part of the Albany Centre of Endemism falls within this province. This article provides Stefan H. Foord4 a checklist for the spider fauna of the Addo Elephant National Park, one of the most prominent Charles R. Haddad5 conservation areas of the Eastern Cape, to detail the species found in the park and determine their conservation status and level of endemicity based on their known distribution. Various Affiliations: 1Biosystematics: Arachnology, collecting methods were used to sample spiders between 1974 and 2016. Forty-seven families ARC – Plant Health and that include 184 genera and 276 species were recorded. Thomisidae (39 spp.), Araneidae Protection, Queenswood, (39 spp.), Salticidae (35 spp.) and Theridiidae (25 spp.) were the most species-rich families, South Africa while 14 families were only represented by a single species. 2Department of Zoology Conservation implications: A total of 12.7% of the South African spider fauna and 32.9% of the and Entomology, University Eastern Cape fauna are protected in the park; 26.4% are South African endemics, and of these, of Pretoria, Pretoria, South Africa 3.6% are Eastern Cape endemics. Approximately, 4% of the species are possibly new to science, and 240 species are recorded from the park for the first time. -
Report on Some Scientific Papers Including One Co-Authored by Member Dr Ian Engelbrecht
This file has been cleaned of potential threats. If you confirm that the file is coming from a trusted source, you can send the following SHA-256 hash value to your admin for the original file. fd74a206a326bb700fbb04be4e7153fa34a7191f396e3981f18a8061427b56f0 To view the reconstructed contents, please SCROLL DOWN to next page. The Spider Club News JUNE 2018 – VOLUME 34 No. 2 Spider paraphernalia : Ex-arachnophobe Irma’s adorable spider slippers Page The Spider Club News JUNE 2018 Vol 34/2 Page 2 About the Spider Club The Spider Club of Southern Africa is a non-profit organisation. Our aim is to encourage an interest in arachnids – especially spiders and scorpions - and to promote this interest and the study of these animals by all suitable means. Membership is open to anyone – people interested in joining the club may apply to any committee member for information. Field outings, day visits, arachnid surveys and demonstrations, workshops and exhibits are arranged from time to time. A diary of events and outings is published at the end of this newsletter. Our Mission Statement “The Spider Club provides a fun, responsible, social learning experience, centred on spiders, their relatives and on nature in general.” Contact Us Your Committee Secretary Colleen Damon 081 565 7646 [email protected] Facebook identifications Niela du Preez 072 304 9358 [email protected] And Public Relations Newsletter Editor Joan Faiola 082 565 6025 [email protected] Chairman Astri Leroy 073 168 7187 [email protected] Webmaster JP Schutte 076 926 1121 [email protected] Committee Member Miemmie Byrch 082 772 3928 [email protected] Committee Member Ruan Lambrechts 084 584 5566 [email protected] Committee/PR Laylaa Suliman 073 911 3683 [email protected] WEBSITE: http://www.spiderclub.co.za EMAIL ADDRESS: [email protected] …. -
Phylogeny of Sicariidae Spiders (Araneae: Haplogynae), with a Monograph on Neotropical Sicarius
Zoological Journal of the Linnean Linnean Society Society,, 2017,2016. 179 With, 767–864. 63 figures With 63 figures Phylogeny of Sicariidae spiders (Araneae: Haplogynae), with a monograph on Neotropical Sicarius IVAN L. F. MAGALHAES1,2*, ANTONIO D. BRESCOVIT3 and ADALBERTO J. SANTOS2 1Division� Aracnolog�ıa, Museo Argentino de Ciencias Naturales ‘Bernardino Rivadavia’, Av. Angel� Gallardo 470, C1405DJR, Buenos Aires, Argentina 2Departamento de Zoologia, Instituto de Ciencias^ Biologicas,� Universidade Federal de Minas Gerais, Av. Antonio^ Carlos, 6627, Belo Horizonte, Minas Gerais, CEP 31270-901, Brazil 767 3Laboratorio� Especial de Coleçoes~ Zoologicas,� Instituto Butantan, Av. Vital Brazil, 1500, Sao~ Paulo, SP, CEP 05503-900, Brazil Received 2 September 2015; revised 29 March 2016; accepted for publication 30 March 2016 Sicariids are an infamous spider family containing two genera: the poorly known Sicarius Walckenaer and the medically important Loxosceles Heineken & Lowe. We present the first broad survey of the morphology of the family from a phylogenetic perspective in order to resolve its relationships. We scored morphological, behavioural and venom feature data for 38 taxa, including New and Old World species of both Sicarius and Loxosceles and three outgroups. Our results point to the monophyly of Sicariidae and its two genera as currently delimited, with the identification of novel synapomorphies for all of them. We present evidence of a group of ‘true’ Loxosceles composed of all members of the genus except those from the spinulosa species group. Sicarius have a very interesting phylogenetic structure, with species from the Americas and Africa forming reciprocally monophyletic groups. Thus, we resurrect Hexophthalma Karsch to accommodate African Sicariinae species. -
Hexophthalma
Hexophthalma Hexophthalma is a genus of spiders in the family Sicariidae.[1] Although the genus was originally erected in 1878 (then with the name Hexomma), it was merged into the genus Sicarius in the 1890s, and remained unused until revived in 2017, when it was discovered that the African species then placed in Sicarius were distinct. External links. Snyman, C. & Larsen, N. (2005), "Spider bite and its treatment in southern Africa", Occupational Health Southern Africa, 11 (2): 22â“26, retrieved 2018-07-23. Euxanthopyge hexophthalma photos. There are no photos of this species on the website yet. You can offer your photo by logging into your account. News. 27.09.2017: Link autocorrection for users comments. 19.09.2017: New photos are needed on a first-priority basis for the following Insecta orders and families. 16.09.2017: If the info about the species is available only in a foreign language. In synonymy: Hexophthalma testacea (Purcell, 1908) = Hexophthalma hahni (Karsch, 1878) (Lotz, 2018: 11). Hexophthalma albospinosa (Purcell, 1908) | | Namibia, South Africa [urn:lsid:nmbe.ch:spidersp:002756]. Sicarius albospinosus Purcell, 1908: 224 (Df). Hexophthalma albospinosa Magalhães, Brescovit & Santos, 2017: 851, f. 20A-B, 21A-B, 62A-C (mf, T from Sicarius). Hexophthalma albospinosa Lotz, 2018: 7, f. 6-8, 17 (mf). Hexophthalma binfordae Lotz, 2018 | | Namibia [urn:lsid:nmbe.ch:spidersp:050246]. Download 16 Hexophthalma Stock Photos for FREE or amazingly low rates! New users enjoy 60% OFF. 85,955,822 stock photos online. Home. Hexophthalma Stock Images, Vector Illustrations And Stock FootageHexophthalma Stock Images, Vector Illustrations And Stock Footage. -
Incorporating Topological and Age Uncertainty Into Event-Based Biogeography of Sand Spiders Supports Paleo-Islands in Galapago
diversity Article Incorporating Topological and Age Uncertainty into Event-Based Biogeography of Sand Spiders Supports Paleo-Islands in Galapagos and Ancient Connections among Neotropical Dry Forests Ivan L. F. Magalhaes 1,2,* , Adalberto J. Santos 2 and Martín J. Ramírez 1 1 División Aracnología, Museo Argentino de Ciencias Naturales “Bernardino Rivadavia”—CONICET, Av. Ángel Gallardo 470, C1405DJR Buenos Aires, Argentina; [email protected] 2 Departamento de Zoologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Av. Antônio Carlos 6627, 31270-901 Belo Horizonte, MG, Brazil; [email protected] * Correspondence: [email protected] Abstract: Event-based biogeographic methods, such as dispersal-extinction-cladogenesis, have become increasingly popular for attempting to reconstruct the biogeographic history of organisms. Such methods employ distributional data of sampled species and a dated phylogenetic tree to estimate ancestral distribution ranges. Because the input tree is often a single consensus tree, uncertainty in topology and age estimates are rarely accounted for, even when they may affect the outcome of biogeographic estimates. Even when such uncertainties are taken into account for estimates of ancestral ranges, they are usually ignored when researchers compare competing biogeographic hypotheses. We explore the effect of incorporating this uncertainty in a biogeographic analysis Citation: Magalhaes, I.L.F.; Santos, of the 21 species of sand spiders (Sicariidae: Sicarius) from Neotropical xeric biomes, based on a A.J.; Ramírez, M.J. Incorporating total-evidence phylogeny including a complete sampling of the genus. Using a custom R script, Topological and Age Uncertainty into we account for uncertainty in ages and topology by estimating ancestral ranges over a sample of Event-Based Biogeography of Sand trees from the posterior distribution of a Bayesian analysis, and for uncertainty in biogeographic Spiders Supports Paleo-Islands in estimates by using stochastic maps. -
Insights Into the Karyotype and Genome Evolution of Haplogyne
www.nature.com/scientificreports OPEN Insights into the karyotype and genome evolution of haplogyne spiders indicate a polyploid Received: 7 August 2018 Accepted: 7 January 2019 origin of lineage with holokinetic Published: xx xx xxxx chromosomes Jiří Král1, Martin Forman1, Tereza Kořínková1, Azucena C. Reyes Lerma1, Charles R. Haddad2, Jana Musilová1,3, Milan Řezáč3, Ivalú M. Ávila Herrera1, Shefali Thakur1, Ansie S. Dippenaar- Schoeman4, František Marec5, Lucie Horová6 & Petr Bureš6 Spiders are an ancient and extremely diverse animal order. They show a considerable diversity of genome sizes, karyotypes and sex chromosomes, which makes them promising models to analyse the evolution of these traits. Our study is focused on the evolution of the genome and chromosomes in haplogyne spiders with holokinetic chromosomes. Although holokinetic chromosomes in spiders were discovered a long time ago, information on their distribution and evolution in these arthropods is very limited. Here we show that holokinetic chromosomes are an autapomorphy of the superfamily Dysderoidea. According to our hypothesis, the karyotype of ancestral Dysderoidea comprised three autosome pairs and a single X chromosome. The subsequent evolution has frequently included inverted meiosis of the sex chromosome and an increase of 2n. We demonstrate that caponiids, a sister clade to Dysderoidea, have enormous genomes and high diploid and sex chromosome numbers. This pattern suggests a polyploid event in the ancestors of caponiids. Holokinetic chromosomes could have arisen by subsequent multiple chromosome fusions and a considerable reduction of the genome size. We propose that spider sex chromosomes probably do not pose a major barrier to polyploidy due to specifc mechanisms that promote the integration of sex chromosome copies into the genome. -
SANSA News, Issue 29, May-Oct 2017
1 SANSA NEWS South African National Survey of Arachnida No 29 MAY OCTOBER 2017 Inside this issue: FEEDBACK ON THE RED LISTING……………………….1–2 SPIDER RED LISTING PROJECT (SRLP) VIRTUAL MUSEUMS..…...................2 It Leon Lotz retires...…………...………. 3 all started in 2006 when the second phase of SANSA was initiated with funding from the New Loxosceles spp….……………....3 South African National Biodiversity Institute (SANBI). The main aim was to evaluate all the New Hexophthalma spp…..……………..4 spider species of South Africa (>2240 species) using the IUCN guidelines. This project forms New Chumma spp….…………………4 part of the Threatened Species Programme of SANBI. The Red Listing process is time- New Diphya sp….……………………..5 consuming and takes a lot of effort to obtain all possible information on a species. For each New Austrahelas sp….……………….5 species, the SRLP starts off with: Diamond Route Reserves.………..….6 University of the Free State…….…7–8 i. Consolidation of all available data on a species University of Venda………………..….9 Student project……………………….10 ii GAP analysis showed where more sampling is needed in South Africa Field obs - Araneus legonensis..11–13 iii. During the last ten years a lot of focus was placed on sampling, identification and revision- Spiders and frogs ……………….14-15 ary research Spider and ants……………………...16 Recent publications……………........17 TYPE OF INFORMATION NEEDED SPECIES NAME: Correct species name and author according the WSC. IMAGE OF SPECIES NATIONAL SPIDER SPECIES COUNT ASSESSMENT NOTES: Common name. Taxonomic data: revised or not; when revised; both sexes known or only one; whether illustrations are available to help with identification. -
Occurrence, Distribution and Biological Description of Loxosceles Rufescens (Dufour, 1820) (Araneae: Sicariidae) from Western India”
“OCCURRENCE, DISTRIBUTION AND BIOLOGICAL DESCRIPTION OF LOXOSCELES RUFESCENS (DUFOUR, 1820) (ARANEAE: SICARIIDAE) FROM WESTERN INDIA” VARSHA TRIVEDI 1* AND PARIN DAL 2 1, 2 Animal Ecology & Conservation Biology Research Laboratory, Department of Biosciences, UGC Centre of Advance Studies, Saurashtra University, Rajkot 360005, Guj, India Email: 1*[email protected] ; [email protected] *Corresponding author ABSTRACT Loxosceles rufescens (Dufour, 1820), a relatively cosmopolitan, synanthropic species with toxic venom which can occasionally cause dermatological injuries in humans; are commonly known as the circum - Mediterranean spider species, their native range covers the Mediterranean Basin and Near East. The present communication highlights the evidence in detail confirmation on biological identity, local habitat preference and distribution of L. rufescens in Western India. Spider diversity survey from July to December 2015 and October 2016 to February 2017; the population of L. rufescens were largely (N=51) occurred in residential and educational buildings in the Kathiawar (viz: Amreli and Rajkot), Gujarat, Western India. In buildings occurrence of microhabitats were corner of wall, boxes of book storage, unused wooden and iron cupboard and their crevices making irregular web, typically in close association with Common Indian Black Ant and Common Indian large Ant. L. rufescens is a medium sized (7-8mm) light to medium brownish, with long and slender legs; bites and their potentiality to humans are less harmful (Nentwig et al. 2017). Key Words: L. rufescens, biology, building, distribution, toxic, Western India Communicating author e-mail: [email protected] 1 INTRODUCTION The six-eyed venomous spider family Sicariidae is known for their notorious bites, which occasionally produce a suit of symptoms known as loxoscelism, characterized by severe necrotic dermatologic injuries (Swanson and Vetter 2006, Yigit et al.