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A new species,    Rhaphidosoma   paganicum    sp. 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.   paganicum    sp. nov.  and another species of   Harpactorinae  ,    Polididus   armatissimus    Stål, 1859 (tribe   Harpactorini  ). It was found that    Rh.   paganicum    sp. nov.  has a karyotype comprising 12 pairs of autosomes and a multiple sex chromosome system (2n♂=24A+X 1 X 2 X 3 Y), 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.   paganicum    sp. 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.

﻿A new species of the genus Rhaphidosoma Amyot et Serville, 1843 ( Heteroptera , Reduviidae ), with data on its chromosome complement

A new species of the genus Rhaphidosoma Amyot et Serville, 1843 ( Heteroptera , Reduviidae ), with data on its chromosome complement