S. tranquebarica has setae number of 4,5 combination on the last two segments of antennule.It is different from three other species, which have 3,3 combination.

• 贵蟳大眼幼体在第二触角最后两节之刚毛数为4, 5的组合，与其他三种均为3, 3的组合明显不同。