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Issue: Vol. 4303 No. 1: 8 Aug. 2017
Type: Article
Published: 2017-08-08
DOI: 10.11646/zootaxa.4303.1.9
Page range: 140–150
Abstract views: 100
PDF downloaded: 2

A new species of Synotaxus and the first chromosomal study on Synotaxidae, presenting a rare XY sex chromosome system in spiders (Araneae, Araneoidea)

Setor de Biologia Geral, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, UFMS, Cidade Universitária, 79070-900, Campo Grande, Mato Grosso do Sul, Brazil
Instituto Butantan, Laboratório Especial de Coleções Zoológicas, Av. Vital Brasil 1500, CEP 05503-900, São Paulo, SP, Brazil
Setor de Biologia Geral, Instituto de Biociências, Universidade Federal de Mato Grosso do Sul, UFMS, Cidade Universitária, 79070-900, Campo Grande, Mato Grosso do Sul, Brazil
Araneae taxonomy Meiosis Cytogenetic Araneomorphae

Abstract

Studies on spider chromosomes are very scarce, with 44 spider families without any cytogenetically analyzed species. Nevertheless, chromosomal characteristics can be useful for species delimitation, such as the sex chromosome system (SCS), which is particularly diverse in spiders. In this study, we describe Synotaxus jaraguari n. sp., based on male and female specimens from midwestern Brazil. This species has a distinctive “horn” in the male ocular area and seems related to a group of species that includes Synotaxus monocerus (Caporiacco, 1947), S. itabaiana Santos & Rheims, 2005 and S. siolli Santos & Rheims, 2005. We also present the first karyotype study on Synotaxidae. The mitotic and meiotic cells of S. jaraguari n. sp. revealed 2n♂ = 22 + XY and 2n♀ = 22 + XX telocentric chromosomes. This is the ninth spider species with a XY/XX SCS, which is extremely rare in the group.

 

References

  1. Agnarsson, I. (2003) The phylogenetic placement and circumscription of the genus Synotaxus (Araneae: Synotaxidae), a new species from Guyana, and notes on theridioid phylogeny. Invertebrate Systematics, 17, 719–734.
    https://doi.org/10.1071/IS03002

    Agnarsson, I. (2004) Morphological phylogeny of cobweb spiders and their relatives (Araneae, Araneoidea, Theridiidae). Zoological Journal of the Linnean Society, 141, 447–626.
    https://doi.org/10.1111/j.1096-3642.2004.00120.x

    Amalin, D.M., Barrion, A.A. & Rueda, L.M. (1992) Morphology and cytology of Argiope catenulata (Doleschall) (Araneae:Araneidae). Asia Life Sciences, 1, 35–44.

    Anjali & Prakash, S. (2014) Cytogenetical investigations on spiders of semi-arid areas. Indian Journal of Arachnology, 3, 40–54.

    Araujo, D., Rheims, C.A., Brescovit, A.D. & Cella, D.M. (2008) Extreme degree of chromosome number variability in species of the spider genus Scytodes (Araneae, Haplogynae, Scytodidae). Journal of Zoological Systematics and Evolutionary Research, 46, 89–95.
    https://doi.org/10.1111/j.1439-0469.2007.00457.x

    Araujo, D., Maia, U.M. & Brescovit, A.D. (2010) The first cytogenetic characterization of the poisonous black widow spider Latrodectus gr. curacaviensis from Brazil, with chromosomal review of the family Theridiidae (Arachnida, Araneae). Micron, 41,165–168.
    https://doi.org/10.1016/j.micron.2009.10.002

    Araujo, D., Schneider, M.C., Paula-Neto, E. & Cella, D.M. (2012) Sex chromosomes and meiosis in spiders: a review. In: Swan, A. (Ed.), Meiosis – Molecular mechanisms and cytogenetic diversity. Intech, Rijeka, pp. 87–108.

    Araujo, D., Oliveira, E.G., Giroti, A.M., Mattos, V.F., Paula-Neto, E., Brescovit, A.D., Schneider, M.C. & Cella, D.M. (2014) Comparative cytogenetics of seven Ctenidae species (Araneae). Zoological Science, 31, 83–88.
    https://doi.org/10.2108/zsj.31.83

    Araujo, D., Oliveira, E.G., Giroti, A.M., Mattos, V.F., Paula Neto, E., Brescovit, A.D., Schneider, M.C. & Cella, D.M. (2015) Chromosome evolution in lycosoid spiders (Araneomorphae): a scenario based on analysis of seven species of the families Lycosidae, Senoculidae and Trechaleidae. Journal of Arachnology, 43, 174–181.
    https://doi.org/10.1636/M14-60

    Araujo, D., Schneider, M.C., Paula-Neto, E. & Cella, D.M. (2017) The spider cytogenetic database. Available from http://www.arthropodacytogenetics.bio.br/spiderdatabase/ (accessed 31 January 2017)

    Barrantes, G. & Triana, E. (2009) Characteristics of the capture threads of Synotaxus sp.(probably S. turbinatus) webs (Araneae, Synotaxidae). Arachnology, 14 (9), 349–352.

    https://doi.org/10.13156/100.014.0901

    Coddington, J.A. (1990) Ontogeny and homology in the male palpus of orb-weaving spiders and their relatives, with comments on phylogeny (Araneoclada: Araneoidea, Deinopoidea). Smithsonian Contributions to Zoology, 496, 1–52.
    https://doi.org/10.5479/si.00810282.496

    Dimitrov, D., Benavides, L.R., Arnedo, M.A., Giribet, G., Griswold, C.E., Scharff, N. & Hormiga, G. (2017) Rounding up the usual suspects: a standard target-gene approach for resolving the interfamilial phylogenetic relationships of ecribellate orb-weaving spiders with a new Family-rank classification (Araneae, Araneoidea). Cladistics, 33 (3), pp. 221–250.
    https://doi.org/10.1111/cla.12165

    Eberhard, W.G. (1977) ‘Rectangular orb’ webs of Synotaxus (Araneae: Theridiidae). Journal of Natural History, 11, 501–507.
    http://dx.doi.org/10.1080/00222937700770431

    Eberhard, W.G. (1995) The web and building behavior of Synotaxus ecuadorensis (Araneae, Synotaxidae). Journal of Arachnology, 23, 25–30.

    Golding, A.E. & Paliulis, L.V. (2011) Karyotype, sex determination, and meiotic chromosome behavior of two pholcid (Araneomorphae, Pholcidae) spiders: implications for karyotype evolution. PLoS ONE, 6 (9), e24748.

    https://doi.org/10.1371/journal.pone.0024748

    Griswold, C.E., Coddington, J.A., Hormiga, G. & Scharff, N. (1998) Phylogeny of the orb-web building spiders (Araneae, Orbiculariae: Deinopoidea, Araneoidea). Zoological Journal of the Linnean Society, 123, 1–99.
    https://doi.org/10.1111/j.1096-3642.1998.tb01290.x

    Hormiga, G. & Griswold, C.E. (2014) Systematics, phylogeny, and evolution of orb-weaving spiders. Annual Review of Entomology, 59, 487–512.
    https://doi.org/10.1146/annurev-ento-011613-162046

    Howell, W.M. & Black, D.A. (1980) Controlled silver staining of nucleolus organizer regions with protective colloidal developer: a 1-step method. Experientia, 36, 1014–1015.
    https://doi.org/10.1007/BF01953855

    Král, J., Musilová, J., Št`áhlavský, F., Řezáč, M., Akan, Z., Edwards, R.L., Coyle, F.A. & Almerje, C.R. (2006) Evolution of the karyotype and sex chromosome systems in basal clades of araneomorph spiders (Araneae: Araneomorphae). Chromosome Research, 14, 859–880.
    https://doi.org/10.1007/s10577-006-1095-9

    Král, J., Kořínková, T., Krkavcová, L., Musilová, J., Forman, M., Herrera, I.M.A., Haddad, C.R., Vítková, M., Henriques, S., Vargas, J.G.P. & Hedin, M. (2013) Evolution of karyotype, sex chromosomes, and meiosis in mygalomorph spiders (Araneae: Mygalomorphae). Biological Journal of the Linnean Society, 109, 377–408.
    https://doi.org/10.1111/bij.12056

    Levan, A.K., Fredga, K. & Sandberg, A.A. (1964) Nomenclature for centromeric position on chromosomes. Hereditas, 52, 201–220.
    https://doi.org/10.1111/j.1601-5223.1964.tb01953.x

    Lopardo, L. & Hormiga, G. (2008) Phylogenetic placement of the Tasmanian spider Acrobleps hygrophilus (Araneae, Anapidae) with comments on the evolution of the capture web in Araneoidea. Cladistics, 24, 1–33.
    https://doi.org/10.1111/j.1096-0031.2007.00173.x

    Rasband, W.S. (1997–2017) ImageJ, U. S. National Institutes of Health, Bethesda, Maryland, USA. Available from http://imagej.nih.gov/ij/ (accessed 14 February 2017)

    Řezáč, M., Král, J., Musilová, J. & Pekár, S. (2006) Unusual karyotype diversity in the European spiders of the genus Atypus (Araneae: Atypidae). Hereditas, 143, 123–129.
    https://doi.org/10.1111/j.2006.0018-0661.01949.x

    Sakamoto, Y. & Zacaro, A.A. (2009) LEVAN, an ImageJ plugin for morphological cytogenetic analysis of mitotic and meiotic chromosomes. Initial version. An open source Java plugin distributed over the Internet. Available from: http://rsbweb.nih.gov/ij/ (accessed 14 February 2017)

    Santos, A.J. & Rheims, C.A. (2005) Four new species and new records for the spider genus Synotaxus Simon, 1895 (Araneae: Synotaxidae) from Brazil. Zootaxa, 937 (1), 1–12.
    https://doi.org/10.11646/zootaxa.937.1.1

    Stávale, L.M., Schneider, M.C., Araujo, D., Brescovit, A.D. & Cella, D.M. (2010) Chromosomes of Theridiidae spiders (Entelegynae): interspecific karyotype diversity in Argyrodes and diploid number intraspecific variability in Nesticodes rufipes. Genetics and Molecular Biology, 33, 663–668.
    https://doi.org/10.1590/S1415-47572010005000076

    Stávale, L.M., Schneider, M.C., Brescovit, A.D. & Cella, D.M. (2011) Chromossomal characteristics and karyotype evolution of Oxyopidae spiders (Araneae, Entelegynae). Genetics and Molecular Research, 10, 752–763.
    https://doi.org/10.4238/vol10-2gmr1084

    World Spider Catalog (2017) World Spider Catalog. Natural History Museum Bern. Version 18.0. Available from: http://wsc.nmbe.ch (accessed 31 January 2017)

    Zhao, Y., Ayoub, N.A. & Hayashi, C.Y. (2010) Chromosome mapping of dragline silk genes in the genomes of widow spiders (Araneae, Theridiidae). PLoS ONE, 5 (9), e12804.
    https://doi.org/10.1371/journal.pone.0012804