de Sousa Ricardo Firmino, Venere Paulo Cesar, Faria Karina de Cassia
Instituto de Ciências Biológicas, Programa de Pós-Graduação em Ecologia e Conservação da Biodiversidade, Universidade Federal do Mato Grosso - UFMT. Av. Fernando Corrêa da Costa, n° 2367, Bairro Boa Esperança. Cuiabá - MT, Brazil Universidade Federal do Mato Grosso Cuiabá Brazil.
Faculdade de Ciências Agrárias, Biológicas e Sociais Aplicadas, Universidade do Estado de Mato Grosso, Av. Prof. Dr. Renato Figueiro Varella, s/n, Nova Xavantina, MT, Brazil Universidade Federal do Mato Grosso Cuiabá Brazil.
Comp Cytogenet. 2021 Apr 2;15(2):89-99. doi: 10.3897/CompCytogen.v15i2.60577. eCollection 2021.
Gervais, 1856 is represented by small frugivorous bats of the Stenodermatinae subfamily. The taxonomy of this group presents controversies and has been subject to changes, especially since the morphological characters evaluated have left gaps that are difficult to fill regarding good species characterization. Previous studies performed in Gervais, 1856 found that the karyotype of this species has a diploid number of chromosomes equal to 30 and 56 autosomal arms. The objective of the present study was to describe, for the first time, the karyotypes of the species (Osgood, 1916) and (Handley, 1987) based on classical cytogenetic markers. For both species, the diploid number found was 2n = 30 and NFa = 56. Two pairs of chromosomes showed markings of the nucleolus organizing regions (AgNORs) in the species and only one pair in , differing from what has already been described for . The two species analyzed here also showed differences in the sex chromosome system, with showing a neo-XY type system while in the classic XY sexual system was observed. In both species, visualization of the constitutive heterochromatin occurred in the pericentromeric region of all chromosomes, as well as in the short arms of the subtelocentric chromosomes. The present work represents an important expansion of karyotypic information for the subfamily Stenodermatinae, bringing chromosomal features that are possible to use in the taxonomic implications of the group.
1856年的热尔韦属以食果小蝙蝠亚科的蝙蝠为代表。该类群的分类存在争议且一直在变化，特别是因为所评估的形态特征存在空白，难以就良好的物种特征进行填补。此前对1856年热尔韦属的研究发现，该物种的核型二倍体染色体数等于30，常染色体臂数为56。本研究的目的是首次基于经典细胞遗传学标记描述（奥氏，1916年）和（汉德利，1987年）这两个物种的核型。对于这两个物种，所发现的二倍体数均为2n = 30，NFa = 56。在该物种中有两对染色体显示出核仁组织区（AgNORs）标记，而在中只有一对，这与已描述的情况不同。这里分析的两个物种在性染色体系统上也存在差异，显示出一种新XY型系统，而在中观察到的是经典的XY性系统。在这两个物种中，组成型异染色质在所有染色体的着丝粒周围区域以及亚端着丝粒染色体的短臂中都有可见。本研究代表了食果小蝙蝠亚科核型信息的重要扩展，带来了可用于该类群分类学研究的染色体特征。
