Mexiclopina campechana gen. et sp. n., from the Gulf of Mexico, SEM-prepared males. A cephalic area showing digeniculate antennules (note flattened aesthetasc-mfs) and mouthparts including maxilla (mx) and maxilliped (mxp) B distal segments (9-15) of antennule showing position of pectinate setae (asterisks) C detail of maxillipedal (mxp) ornamentation of basis and endopodal segmentation and armature, ventral view D fifth leg(P5) partly damaged but with distinctive serrate spine and sixth leg (P6) with inner spiniform process (arrowed) E fifth leg F rostrum, geniculate antennules and antennae, ventral view; another male specimen.