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

位于背甲上的四五步足，末端 呈钩状，使疣面关蟹具有携物之能力。

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

其次，四种蟳体在五泳足、三颚足五步足都有较明显的差异。