Comparative Cytogenetics of Seven Ctenidae Species (Araneae)

Comparative Cytogenetics of Seven Ctenidae Species (Araneae)

Author Araujo, Douglas Google Scholar
Oliveira, Edson Gabriel de Google Scholar
Giroti, Andre Marsola Google Scholar
Mattos, Viviane Fagundes Google Scholar
Paula-Neto, Emygdio Google Scholar
Brescovit, Antonio Domingos Google Scholar
Schneider, Marielle Cristina Autor UNIFESP Google Scholar
Cella, Doralice Maria Google Scholar
Institution Universidade Federal de Mato Grosso do Sul (UFMS)
Universidade de São Paulo (USP)
Inst Butantan
Universidade Federal de São Paulo (UNIFESP)
Abstract The present study elevates the number of cytogenetically analyzed ctenid species and genera from two to eight and six, respectively, presenting comparisons between chromosomal data obtained and the phylogenetic hypothesis proposed in the literature. Six ctenid species presented 13 autosomal pairs, exhibiting either X(1)X(2)0 (Ctenus ornatus, Ctenus sp., Parabatinga brevipes and Phoneutria nigriventer) or X(1)X(2)X(3)0 sex chromosome systems (Nothroctenus sp. and Viracucha andicola). Asthenoctenus borellii showed 2n male = 20 + X(1)X(2)0. in all species, the chromosomes were telocentric. Some cells of one C. ornatus specimen exhibited one extra chromosome that, considering the behavioral similarities between the two chromosomes, can be considered to be supernumerary, derived from or giving rise to a sex chromosome. Silver impregnation revealed nucleolar organizer regions on one autosomal pair of C. ornatus and P. nigriventer (Cteninae) and two pairs of V. andicola (Acanthocteninae). Chromosomal data suggests that the X(1)X(2)X(3)0 system arose several times in the evolution of entelegyne spiders, and that conversion of an X(1)X(2)0 system into an X(1)X(2)X(3)0 system and vice-versa has been a relatively common event in spiders. All the chromosomal data corroborate the close relationship between Ctenus and Phoneutria, the placement of P. brevipes within Cteninae, the placement of Anahita in a separated branch within Cteninae, and the inclusion of A. borellii in a distinct group within the ctenids (Viridasiinae), all of which are as proposed by phylogenetic hypotheses available in the literature.
Keywords diploid number
nucleolar organizer region
sex chromosome system
GST clade
Language English
Sponsor Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Instituto Brasileiro do Meio Ambiente e dos Recursos Renovaveis - IBAMA
Instituto Chico Mendes de Conservacao da Biodiversidade (ICMBio)
Grant number FAPESP: 2010/14193-7
CNPq: DA 471821-2008
Instituto Chico Mendes de Conservacao da Biodiversidade (ICMBio): 15157-1
Date 2014-02-01
Published in Zoological Science. Tokyo: Zoological Soc Japan, v. 31, n. 2, p. 83-88, 2014.
ISSN 0289-0003 (Sherpa/Romeo, impact factor)
Publisher Zoological Soc Japan
Extent 83-88
Access rights Open access Open Access
Type Article
Web of Science ID WOS:000330716300005

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