Mexiclopina campechana gen. et sp. n., female holotype. A urosome showing fifth legs, ventral view B first swimming leg with exopod C endopod of first leg D third leg E fourth leg, asterisk indicates modified seta on endopod F intercoxal sclerite of first leg showing spiniform processes G same, third leg H same, fourth leg. Scale bars: 50 µm (A); 10 µm (B–H).