Venomous Loxosceles Species (Araneae, Haplogynae, Sicariidae) from Brazil: 2nâ™ = 23 and X1X2Y Sex Chromosome System as Shared Characteristics
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.2108/zs190128 http://hdl.handle.net/11449/198738 |
Resumo: | The family Sicariidae comprises the genera Hexophthalma, Sicarius and Loxosceles. This latter is subdivided in eight monophyletic groups based on genitalia morphology and molecular analyses: amazonica, gaucho, laeta, and spadicea (South America); reclusa (North America); rufescens (Mediterranean); spinulosa and vonwredei (Africa). In Brazil, the genus Loxosceles is represented by 50 species. The mitotic and meiotic characteristics of eight Loxosceles species were analyzed in order to discuss the chromosome evolution, as well as the correspondence between cytogenetic data and morphological/molecular data for the delimitation of the South American groups of species belonging to this genus. All species studied in this work showed 2nâ™ = 23, including a X1X2Y sex chromosome system (SCS). Despite the similarity of diploid number and SCS, the species studied here differed regarding the chromosome morphology of some autosomal pairs, presence of secondary constrictions, size of X chromosomes and localization of Ag-NOR/rDNA sites. Based on all these chromosomal data, we verified a close relationship between Loxosceles species belonging to the amazonica and gaucho groups. Transmission electron microscopy (TEM) analysis of spread pachytene cells of L. gaucho showed regular synapsis between homologous autosomal chromosomes, but asynaptic behavior of the sex chromosomes. The axial elements of the sex chromosomes undergo conspicuous morphological modifications resulting in shortening of their length. |
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Venomous Loxosceles Species (Araneae, Haplogynae, Sicariidae) from Brazil: 2nâ™ = 23 and X1X2Y Sex Chromosome System as Shared Characteristicsbrown spiderchromosome evolutionfluorescence in situ hybridizationmeiosissynaptonemal complexThe family Sicariidae comprises the genera Hexophthalma, Sicarius and Loxosceles. This latter is subdivided in eight monophyletic groups based on genitalia morphology and molecular analyses: amazonica, gaucho, laeta, and spadicea (South America); reclusa (North America); rufescens (Mediterranean); spinulosa and vonwredei (Africa). In Brazil, the genus Loxosceles is represented by 50 species. The mitotic and meiotic characteristics of eight Loxosceles species were analyzed in order to discuss the chromosome evolution, as well as the correspondence between cytogenetic data and morphological/molecular data for the delimitation of the South American groups of species belonging to this genus. All species studied in this work showed 2nâ™ = 23, including a X1X2Y sex chromosome system (SCS). Despite the similarity of diploid number and SCS, the species studied here differed regarding the chromosome morphology of some autosomal pairs, presence of secondary constrictions, size of X chromosomes and localization of Ag-NOR/rDNA sites. Based on all these chromosomal data, we verified a close relationship between Loxosceles species belonging to the amazonica and gaucho groups. Transmission electron microscopy (TEM) analysis of spread pachytene cells of L. gaucho showed regular synapsis between homologous autosomal chromosomes, but asynaptic behavior of the sex chromosomes. The axial elements of the sex chromosomes undergo conspicuous morphological modifications resulting in shortening of their length.Universidade Federal de Mato Grosso Do sul - UFMS Setor de Biologia Geral Instituto de Biociências Cidade Universitária Bairro UniversitárioUniversidade Federal de Mato Grosso UFMT Departamento de Biologia e Zoologia, Av. Fernando Côrrea da Costa, 2367Universidade Federal de Viçosa - UFV Centro de Ciências Biológicas e da Saúde Departamento de Biologia Geral Campus Universitário, Av. P.H. Rolfs, s/n°Universidade Estadual Paulista - UNESP Instituto de Biociências Departamento de Biologia, Av. 24-A, 1515, Bela VistaInstituto Butantan Laboratório Especial de Coleções Zoológicas, Av. Vital Brasil, 1500Universidade Estadual Paulista - UNESP Instituto de Biociências Departamento de Biologia, Av. 24-A, 1515, Bela VistaUniversidade Federal de Mato Grosso do Sul (UFMS)UFMTUniversidade Federal de Viçosa (UFV)Universidade Estadual Paulista (Unesp)Laboratório Especial de Coleções ZoológicasAraujo, DouglasSchneider, Marielle CristinaZacaro, Adilson ArizaDe Oliveira, Edson Gabriel [UNESP]Martins, RosanaBrescovit, Antonio DomingosKnysak, IreneCella, Doralice Maria2020-12-12T01:20:44Z2020-12-12T01:20:44Z2020-04-06info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article128-139http://dx.doi.org/10.2108/zs190128Zoological Science, v. 37, n. 2, p. 128-139, 2020.0289-0003http://hdl.handle.net/11449/19873810.2108/zs1901282-s2.0-85083316262Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengZoological Scienceinfo:eu-repo/semantics/openAccess2021-10-22T20:04:15Zoai:repositorio.unesp.br:11449/198738Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:31:00.762874Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Venomous Loxosceles Species (Araneae, Haplogynae, Sicariidae) from Brazil: 2nâ™ = 23 and X1X2Y Sex Chromosome System as Shared Characteristics |
title |
Venomous Loxosceles Species (Araneae, Haplogynae, Sicariidae) from Brazil: 2nâ™ = 23 and X1X2Y Sex Chromosome System as Shared Characteristics |
spellingShingle |
Venomous Loxosceles Species (Araneae, Haplogynae, Sicariidae) from Brazil: 2nâ™ = 23 and X1X2Y Sex Chromosome System as Shared Characteristics Araujo, Douglas brown spider chromosome evolution fluorescence in situ hybridization meiosis synaptonemal complex |
title_short |
Venomous Loxosceles Species (Araneae, Haplogynae, Sicariidae) from Brazil: 2nâ™ = 23 and X1X2Y Sex Chromosome System as Shared Characteristics |
title_full |
Venomous Loxosceles Species (Araneae, Haplogynae, Sicariidae) from Brazil: 2nâ™ = 23 and X1X2Y Sex Chromosome System as Shared Characteristics |
title_fullStr |
Venomous Loxosceles Species (Araneae, Haplogynae, Sicariidae) from Brazil: 2nâ™ = 23 and X1X2Y Sex Chromosome System as Shared Characteristics |
title_full_unstemmed |
Venomous Loxosceles Species (Araneae, Haplogynae, Sicariidae) from Brazil: 2nâ™ = 23 and X1X2Y Sex Chromosome System as Shared Characteristics |
title_sort |
Venomous Loxosceles Species (Araneae, Haplogynae, Sicariidae) from Brazil: 2nâ™ = 23 and X1X2Y Sex Chromosome System as Shared Characteristics |
author |
Araujo, Douglas |
author_facet |
Araujo, Douglas Schneider, Marielle Cristina Zacaro, Adilson Ariza De Oliveira, Edson Gabriel [UNESP] Martins, Rosana Brescovit, Antonio Domingos Knysak, Irene Cella, Doralice Maria |
author_role |
author |
author2 |
Schneider, Marielle Cristina Zacaro, Adilson Ariza De Oliveira, Edson Gabriel [UNESP] Martins, Rosana Brescovit, Antonio Domingos Knysak, Irene Cella, Doralice Maria |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de Mato Grosso do Sul (UFMS) UFMT Universidade Federal de Viçosa (UFV) Universidade Estadual Paulista (Unesp) Laboratório Especial de Coleções Zoológicas |
dc.contributor.author.fl_str_mv |
Araujo, Douglas Schneider, Marielle Cristina Zacaro, Adilson Ariza De Oliveira, Edson Gabriel [UNESP] Martins, Rosana Brescovit, Antonio Domingos Knysak, Irene Cella, Doralice Maria |
dc.subject.por.fl_str_mv |
brown spider chromosome evolution fluorescence in situ hybridization meiosis synaptonemal complex |
topic |
brown spider chromosome evolution fluorescence in situ hybridization meiosis synaptonemal complex |
description |
The family Sicariidae comprises the genera Hexophthalma, Sicarius and Loxosceles. This latter is subdivided in eight monophyletic groups based on genitalia morphology and molecular analyses: amazonica, gaucho, laeta, and spadicea (South America); reclusa (North America); rufescens (Mediterranean); spinulosa and vonwredei (Africa). In Brazil, the genus Loxosceles is represented by 50 species. The mitotic and meiotic characteristics of eight Loxosceles species were analyzed in order to discuss the chromosome evolution, as well as the correspondence between cytogenetic data and morphological/molecular data for the delimitation of the South American groups of species belonging to this genus. All species studied in this work showed 2nâ™ = 23, including a X1X2Y sex chromosome system (SCS). Despite the similarity of diploid number and SCS, the species studied here differed regarding the chromosome morphology of some autosomal pairs, presence of secondary constrictions, size of X chromosomes and localization of Ag-NOR/rDNA sites. Based on all these chromosomal data, we verified a close relationship between Loxosceles species belonging to the amazonica and gaucho groups. Transmission electron microscopy (TEM) analysis of spread pachytene cells of L. gaucho showed regular synapsis between homologous autosomal chromosomes, but asynaptic behavior of the sex chromosomes. The axial elements of the sex chromosomes undergo conspicuous morphological modifications resulting in shortening of their length. |
publishDate |
2020 |
dc.date.none.fl_str_mv |
2020-12-12T01:20:44Z 2020-12-12T01:20:44Z 2020-04-06 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.2108/zs190128 Zoological Science, v. 37, n. 2, p. 128-139, 2020. 0289-0003 http://hdl.handle.net/11449/198738 10.2108/zs190128 2-s2.0-85083316262 |
url |
http://dx.doi.org/10.2108/zs190128 http://hdl.handle.net/11449/198738 |
identifier_str_mv |
Zoological Science, v. 37, n. 2, p. 128-139, 2020. 0289-0003 10.2108/zs190128 2-s2.0-85083316262 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Zoological Science |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
128-139 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
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1808129213771808768 |