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A new species of the genus Rhaphidosoma Amyot et Serville, 1843 (Heteroptera, Reduviidae), with data on its chromosome complement
Comparative Cytogenetics ( IF 1 ) Pub Date : 2021-12-15 , DOI: 10.3897/compcytogen.v15.i4.78718
Dmitry A Gapon 1 , Valentina G Kuznetsova 1 , Anna Maryańska-Nadachowska 2
Affiliation  

 A new species, Rhaphidosoma paganicumsp. nov. (Heteroptera: Reduviidae: Harpactorinae: Rhaphidosomatini), is described from the Dry Zone of Myanmar. It is the fifth species of Rhaphidosoma Amyot et Serville, 1843, known from the Oriental Region, and the first record of the genus for Myanmar and Indochina. The structure of the external and internal terminalia of the male and female is described and illustrated in detail. The completely inflated endosoma is described for the first time in reduviids. The complex structure of the ductus seminis is shown; it terminates with a voluminous seminal chamber which opens with a wide secondary gonopore and may be a place where spermatophores are formed. The new species is compared with all congeners from the Oriental Region and Western Asia. It is characterised by the absence of distinct tubercles on the abdominal tergites of the male, the presence only two long tubercles and small rounded ones on the abdominal tergites VII and VI, respectively, in the female, the presence of short fore wing vestiges which are completely hidden under longer fore wing vestiges, and other characters. In addition to the morphological description, an account is given of the male karyotype and the structure of testes of Rh. paganicumsp. nov. and another species of Harpactorinae, Polididus armatissimus Stål, 1859 (tribe Harpactorini). It was found that Rh. paganicumsp. nov. has a karyotype comprising 12 pairs of autosomes and a multiple sex chromosome system (2n♂=24A+X1X2X3Y), whereas P. armatissimus has a karyotype comprising five pairs of autosomes and a simple sex chromosome system (2n♂=10A+XY). The males of these species were found to have seven and nine follicles per testis, respectively. FISH mapping of 18S ribosomal DNA (major rDNA) revealed hybridisation signals on two of the four sex chromosomes (Y and one of the Xs) in Rh. paganicumsp. nov. and on the largest pair of autosomes in P. armatissimus. The presence of the canonical “insect” (TTAGG)n telomeric repeat was detected in the chromosomes of both species. This is the first application of FISH in the tribe Raphidosomatini and in the genus Polididus Stål, 1858.

中文翻译:

Amyot et Serville Rhaphidosoma Amyot et Serville 属的一个新种,1843 年(异翅目,Reduviidae),及其染色体互补数据

 一个新物种,Rhaphidosoma paganicumsp。十一月 (异翅目:Reduviidae:Harpactorinae:Rhaphidosomatini),描述于缅甸的旱区。它是 Amyot et Serville 的第五种,1843 年,从东方地区已知,也是缅甸和印度支那属的第一个记录。详细描述和说明了男性和女性的外部和内部终端的结构。完全膨胀的内体首次在 reduviids 中被描述。显示了精管的复杂结构;它的末端是一个巨大的精囊,其开口有一个宽阔的次生生殖孔,可能是形成精囊的地方。新物种与来自东方地区和西亚的所有同系物进行了比较。其特征是雄性的腹部小节上没有明显的结节,在雌性的腹部小节VII和VI上分别只有两个长的小结节和小的圆形小节,前翅的残迹很短。完全隐藏在较长的前翼痕迹和其他字符下。除了形态学描述外,还对男性核型和Rh睾丸结构进行了说明。paganicumsp. 十一月 和另一种 Harpactorinae,Polididus armatissimus Stål,1859 年(Harpactorini 部落)。发现Rh。paganicumsp. 十一月 核型包括 12 对常染色体和多性染色体系统 (2n♂=24A+X1X2X3Y),而 P. armatissimus 的核型包括五对常染色体和简单的性染色体系统 (2n♂=10A+XY)。发现这些物种的雄性每个睾丸分别有七个和九个卵泡。18S 核糖体 DNA(主要 rDNA)的 FISH 作图显示 Rh 中四个性染色体中的两个(Y 和 Xs 之一)上的杂交信号。paganicumsp. 十一月 以及 P. armatissimus 中最大的一对常染色体。在两个物种的染色体中都检测到了典型的“昆虫”(TTAGG)n 端粒重复序列的存在。这是 FISH 在 Raphidosomatini 部落和 Polididus Stål 属中的首次应用,1858 年。在两个物种的染色体中都检测到了典型的“昆虫”(TTAGG)n 端粒重复序列的存在。这是 FISH 在 Raphidosomatini 部落和 Polididus Stål 属中的首次应用,1858 年。在两个物种的染色体中都检测到了典型的“昆虫”(TTAGG)n 端粒重复序列的存在。这是 FISH 在 Raphidosomatini 部落和 Polididus Stål 属中的首次应用,1858 年。
更新日期:2021-12-15
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