Comparative cytogenetics among populations of two Bothriurus species (Scorpiones, Bothriuridae)

Lima, Juliana F. De; Schneider, Marielle C.; Carvalho, Leonardo Sousa; Pinto-da-Rocha, Ricardo

doi:10.3897/compcytogen.19.165160

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Article: Comparative cytogenetics among populations of two Bothriurus species (Scorpiones, Bothriuridae)

Title

Comparative cytogenetics among populations of two Bothriurus species (Scorpiones, Bothriuridae)

By

Lima, Juliana F. De
Schneider, Marielle C.
Carvalho, Leonardo Sousa
Pinto-da-Rocha, Ricardo

Type

Article

Date of Publication

2025-11-13

Original Publication

Comparative cytogenetics : international journal of plant & animal cytogenetics, karyosystematics and molecular systematics

Volume

Pages

189--208

Subjects

chromosomal rearrangements , chromosome , fluorochrome , heterochromatin , Meiosis , silver impregnation

Contributed by

Pensoft Publishers

Language

English

Published by

St. Petersburg, Russia [Published] with technical support of Zoological Institute RAS [2007]-

Identifiers

DOI: https://doi.org/10.3897/compcytogen.19.165160

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License Type URL: https://creativecommons.org/licenses/by/4.0/
Rights: https://biodiversitylibrary.org/permissions
Copyright Status: In copyright. Digitized with the permission of the rights holder.
Rights Holder: Copyright held by individual article author(s).

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expand Abstract

Bothriurus Peters, 1861 is one of the most diverse genera within the family Bothriuridae. However, to date, only five species have been analyzed using a cytogenetic approach. In this study, for the first time, two populations of Bothriurus asper Pocock, 1893 and nine populations of Bothriurus rochai Mello-Leitão, 1932, two species from northeastern Brazil, were analyzed with respect to diploid number, chromosomal behavior during meiosis, and the localization of heterochromatin and nucleolus organizer regions (NORs). For B. asper , a diploid number of 2n = 30 was recorded in geographically distant populations, whereas B. rochai exhibited intraspecific variation in diploid number (2n = 16 and 2n = 18), representing the lowest diploid numbers ever reported for the family Bothriuridae. Despite the variability in diploid number, the number and localization of NORs remained stable among the populations of B. rochai . When comparing heterochromatin patterns between the two species, larger blocks of constitutive heterochromatin were observed in B. asper than in B. rochai . Variation in the amount of heterochromatin among populations of B. rochai was also observed; in this case, the population with the lowest amount of heterochromatin also exhibited the greatest variation in post-pachytene cell configurations. This is the first study to cytogenetically analyze multiple populations of species within the genus Bothriurus , and it significantly expands the karyotypic information available for scorpions with monocentric chromosomes.