ODONATA FROM THE ENNEDI AND OUNIANGA REGIONS OF NORTHERN CHAD, WITH A NOTE OF THE STATUS OF ORTHETRUM KOLLMANNSPERGERIBUCHHOLZ, AND A CHECKLIST OF SPECIES CURRENTLY KNOWN FROM THE REPUBLIC OF CHAD

摘要

A hydrobiological survey of scarce permanent aquatic environments in the Ennedi and Ounianga regions of northern Chad yielded a small collection of 7 odon. spp. It adds 3 new spp to the known fauna of Chad: hchnura senegalensis, Pseudagrion hamoni, and Orthetrum sabina. The presence of O. sabina at Ounianga represents the westernmost record of this oriental sp. in N. Africa, Another oriental element, O. taeniolatum, may not exist in Africa W. of the Nile, possibly being replaced there by the closelyrelated O. kallmanmspergeri Buchholz. The 44 spp. hitherto reported from the Republic of Chad likely represent only a third or less of those to be expected in the country.