翅瓣

The team also noted a hinged flap near the base of the wing, called an Alula, which is deployed at right angles to the wing, which may be being used as a air flow-control device. 這個(gè)小組還注意到，翼根附近鉸接的副翼，被稱為小翼的，對翼成直角配置，它可能被用來作為空氣流量控制裝置。

zoology) pertaining to alulae. （動(dòng)物學(xué)）與昆蟲的翅翼有關(guān)。

alula 小翼羽