According to Elsner "mentioned by Hickmann (1958, Sp.997) as a synonym of qasaba", and (in my perception rather enigmatically) defined as "another tone name [?] from the classical tradition"; NB: Elsner's source proves to be Hickmann's article »Die außereuropäischen und antiken Klarinetteninstrumente« [The non-European and ancient clarinets] in »Die Musik in Geschichte und Gegenwart« (MGG), Bd. 7, Sp[alte] 993-1005.