The humpbacked grasshopper Dericorys albidula (Serville, 1838) (Orthoptera: Dericorythidae: Dericorythinae) is reported here for the first time from Southern Tunisia (Tozeur province) and northwestern Libya. Details on the ecological occurrence of D. albidula are given and compared to available data from Central Asia. A lectotype is designated for D. albidula and its type locality identified as the Sinaï desert in Egypt.
Since the publication of Chopard's 1943 book, Les Orthoptéroides d'Afrique du Nord, the diversity of Orthoptera in Tunisia has not been studied or prospected except for 20 publications. Furthermore, the classification of Orthoptera has changed since 1943 due to taxonomic and phylogenetic advances. To allow a full survey of the Tunisian grasshopper fauna, it is thus necessary first to correctly survey the biological diversity of grasshoppers in Tunisia, and second to have an updated taxonomic reference in order to describe this diversity and compare it with the grasshopper faunas in the other countries of the Maghreb. In the present paper, we propose an updated checklist and a key for the identification of Tunisian grasshoppers, based primarily on field sampling in central and southwestern Tunisia, and literature data for other Tunisian areas. Each species is documented with habitus photographs, geographical distribution, and type of habitat. In total, for the prospected areas, 75 species of Caelifera belonging to five families and 43 genera are listed, while 83 species were recorded up to now for the whole Tunisia. Among these 75 species, seven are newly recorded for Tunisia, i.e., Sphodromerus
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