D. frascone's fourth and fifth pairs of pereiopods on the carapace have hooked ends and therefore enable them to carry things.

位于背甲上的第四对及第五对步足，末端 呈钩，面关蟹具有之能力。

In addition, these four kinds of megalopa are different on the fifth pleopod, third maxilliped and fifth pereiopod.

其次，四种蟳大眼幼体在第五泳足、第三颚足及第五步足都有较明显的差异。