维基百科
Gammarus is an amphipod crustacean genus in the family Gammaridae. It contains more than 200 described species, making it one of the most speciose genera of crustaceans.[2] Different species hav
雄性翅展17.5–-23.5 mm mm。额被黄白色及暗褐色短鳞片;头顶被粗糙灰褐色鳞片和量黄褐色鳞片。触角灰褐色。翅基片发达,灰褐色和黄褐色鳞片混杂;胸部基半部灰褐色,端半部黄褐色。足灰白色,前足和中足跗节被灰褐色鳞片。前翅宽阔,前缘从基部到中部均匀隆起,其后较平直;臀角宽圆。前翅底色灰褐色,斑纹暗褐色或锈褐色1基斑较大,指状,端部上弯;顶角和外缘端半部缘毛灰褐色,其余部分黄褐色或黄白色。后翅暗