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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Comparative cytogenetic analysis among filistatid spiders (Araneomorphae: Haplogynae)

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Autor(es):
Paula-Neto, Emygdio ; Cella, Doralice Maria ; Araujo, Douglas ; Brescovit, Antonio Domingos ; Schneider, Marielle Cristina
Número total de Autores: 5
Tipo de documento: Artigo Científico
Fonte: JOURNAL OF ARACHNOLOGY; v. 45, n. 1, p. 123-128, 2017.
Citações Web of Science: 1
Resumo

The family Filistatidae is considered sister to Synspermiata or sister to Hypochilidae. Cytogenetic knowledge of this family could be useful for understanding the mechanism of chromosome evolution that has occurred within the group. In this work, two filistatid species belonging to distinct subfamilies, Kukulcania hibernalis (Hentz, 1842) (Filistatinae) and Misionella mendensis (Mello-Leitao, 1920) (Prithinae), were investigated using standard and differential chromosome staining. Analysis of mitotic and meiotic cells revealed the diploid 2n male = 25 for K. hibernalis and 2n male = 21 for M. mendensis. Both species exhibited a sex chromosome system of the X1X2Y type and metacentric/submetacentric chromosomes. In prophase I cells, the sex chromosomes were in a trivalent configuration with all elements associated without chiasma through their terminal regions. Both species revealed six nucleolar organizer regions on the terminal region of three autosomal pairs. In K. hibernalis, constitutive heterochromatin was located mainly in the terminal regions of autosomes and sex chromosomes while in M. mendensis, the heterochromatin occurred in the pericentromeric region of all chromosomes. Despite the scarcity of cytogenetic information for Filistatidae, the available results show the occurrence of high variability in the diploid number but with the maintenance of the X1X2Y sex chromosome system. Additionally, the karyotype differentiation in the species of this family seems to have involved not only the number of autosomes but also specific chromosomal sites, such as the constitutive heterochromatic regions. (AU)

Processo FAPESP: 11/50689-0 - Sistemática de aranhas haplóginas neotropicais (Arachnida, Araneae)
Beneficiário:Antonio Domingos Brescovit
Linha de fomento: Auxílio à Pesquisa - Temático
Processo FAPESP: 11/21643-1 - Meiose em escorpiões (Arachnida): modelo para compreender a evolução em espécies com cromossomos aquiasmáticos
Beneficiário:Marielle Cristina Schneider
Linha de fomento: Auxílio à Pesquisa - Apoio a Jovens Pesquisadores
Processo FAPESP: 10/14193-7 - Evolução cromossômica em aranhas caranguejeiras (Mygalomorphae) e haplóginas basais (Araneomorphae)
Beneficiário:Emygdio de Paula Neto
Linha de fomento: Bolsas no Brasil - Mestrado