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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Comparative cytogenetic analysis among filistatid spiders (Araneomorphae: Haplogynae)

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Paula-Neto, Emygdio ; Cella, Doralice Maria ; Araujo, Douglas ; Brescovit, Antonio Domingos ; Schneider, Marielle Cristina
Total Authors: 5
Document type: Journal article
Source: JOURNAL OF ARACHNOLOGY; v. 45, n. 1, p. 123-128, 2017.
Web of Science Citations: 1

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)

FAPESP's process: 11/50689-0 - Systematic of the neotropical haplogynae spiders (Arachnida, Araneae)
Grantee:Antonio Domingos Brescovit
Support type: Research Projects - Thematic Grants
FAPESP's process: 11/21643-1 - Meiosis in scorpions (Arachnida): model to understand the evolution in species with achiasmate chromosomes
Grantee:Marielle Cristina Schneider
Support type: Research Grants - Young Investigators Grants
FAPESP's process: 10/14193-7 - Chromosomal evolution of tarantula (Mygalomorphae) and basal haplogyne spiders (Araneomorphae)
Grantee:Emygdio de Paula Neto
Support type: Scholarships in Brazil - Master