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A review of the ‘Polyrhachis aculeata’species-group of the subgenus ‘Myrma’Billberg (Hymenoptera: Formicidae: Formicinae), with keys and descriptions of new species
On the bibliography of a late eighteenth-century German work on natural history and an early record of Leuciscus meidingeri Heckel, 1852 (Pisces, Cyprinidae) in the river system of the Upper Danube on 6th APRIL 1786