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Karyotypes of some Ghanaian Shield-Bugs and the Higher Systematics of the Pentatomoidea (Hemiptera: Heteroptera)

  • Kwame Afreh Nuamah
Research Article

Abstract

Data on 2n-numbers of 55 species, belonging to six families of Ghanaian shield-bugs, collected in Southern Ghana, West Africa, are presented. Micrographs and tracings of karyotypes observed for each species are reproduced as figures. Histograms of chromosome numbers of the various families have been constructed and these results, together with the existing information in the literature, are analysed and discussed.

In all, 217 species of Pentatomoidea were found to be known cytologically in the literature. With the present work, the total number of species of shield-bugs where the karyotypes are now known stands at 266.

The following karyotype groups appear to emerge from the study: 14 and 12. Under group 14 is the family Pentatomidae, whilst the families Scutelleridae, Cydnidae and Plataspidae fall under the karyotype group 12. No basic chromosome number can however be cited for the other families of Pentatomoidea, namely the Dinidoridae, Tessaratomidae, Acanthosomatidae and Urostylidae, because the cytological data for each of these are too scanty for any such conclusions to be arrived at. The interrelation of various groups in the superfamily Pentatomoidea is discussed, and the present investigations tend to support the work and conclusions arrived at by morpho-taxonomical studies.

Key Words

Karyotypes shield-bugs chromosomes classification systematics families 

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Copyright information

© ICIPE 1982

Authors and Affiliations

  • Kwame Afreh Nuamah
    • 1
  1. 1.Department of ZoologyUniversity of GhanaLegonGhana

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